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Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2011	Feb. 17, 2012	Jul. 01, 2011
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Entity Registrant Name	ON SEMICONDUCTOR CORP
Entity Central Index Key	0001097864
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		452,136,921
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 3,522,004,475
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 652.9	$ 623.3
Short-term investments	248.6
Receivables, net	457.2	294.6
Inventories	637.4	360.8
Other current assets	121.6	63.6
Deferred income taxes, net of allowances	10.0	15.7
Total current assets	2,127.7	1,358.0
Restricted cash		142.1
Property, plant and equipment, net	1,109.5	864.3
Deferred income taxes, net of allowances	34.2
Goodwill	198.7	191.2
Intangible assets, net	337.2	303.0
Other assets	76.2	60.6
Total assets	3,883.5	2,919.2
Liabilities, Minority Interests and Stockholders' Equity
Accounts payable	451.8	256.9
Accrued expenses	239.8	162.6
Income taxes payable	7.5	5.1
Accrued interest	0.7	0.8
Deferred income on sales to distributors	172.0	149.5
Deferred income taxes, net of allowances	33.6
Current portion of long-term debt (See Note 8)	370.1	136.0
Total current liabilities	1,275.5	710.9
Long-term debt (See Note 8)	836.9	752.8
Other long-term liabilities	260.1	49.3
Deferred income taxes, net of allowances	17.5	18.2
Total liabilities	2,390.0	1,531.2
Commitments and contingencies (See Note 15)
ON Semiconductor Corporation stockholders' equity:
Common stock ($0.01 par value, 750,000,000 shares authorized, 502,452,084 and 485,904,100 shares issued, 451,284,220 and 436,774,177 shares outstanding, respectively)	5.0	4.9
Additional paid-in capital	3,113.5	3,016.1
Accumulated other comprehensive loss	(46.7)	(59.1)
Accumulated deficit	(1,202.3)	(1,213.9)
Less: treasury stock, at cost; 51,167,864 and 49,129,923 shares, respectively	(401.3)	(382.0)
Total ON Semiconductor Corporation stockholders' equity	1,468.2	1,366.0
Minority interests in consolidated subsidiaries	25.3	22.0
Total equity	1,493.5	1,388.0
Total liabilities and equity	$ 3,883.5	$ 2,919.2

Consolidated Balance Sheet (Parenthetical) - $ / shares	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	502,452,084	485,904,100
Common stock, shares outstanding	451,284,220	436,774,177
Treasury stock, shares	51,167,864	49,129,923

Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Operations [Abstract]
Revenues	$ 3,442.3	$ 2,313.4	$ 1,768.9
Cost of product revenues	2,433.5	1,357.4	1,148.2
Gross profit	1,008.8	956.0	620.7
Operating expenses:
Research and development	362.5	248.0	198.8
Selling and marketing	195.1	145.6	120.9
General and administrative	192.4	129.9	104.5
Amortization of acquisition-related intangible assets	42.7	31.7	29.0
Restructuring, asset impairments and other, net	102.7	10.5	24.9
Goodwill and intangible asset impairment		16.1
Total operating expenses	895.4	581.8	478.1
Operating income	113.4	374.2	142.6
Other income (expenses), net:
Interest expense	(68.9)	(61.4)	(64.6)
Interest income	1.1	0.5	0.8
Other	(8.9)	(6.9)	(4.7)
Loss on debt repurchase and exchange	(23.2)	(0.7)	(3.1)
Gain on SANYO Semiconductor acquisition	24.3
Other income (expenses), net	(75.6)	(68.5)	(71.6)
Income before income taxes	37.8	305.7	71.0
Income tax provision	(22.9)	(12.8)	(7.7)
Net income	14.9	292.9	63.3
Less: Net income attributable to minority interests	(3.3)	(2.4)	(2.3)
Net income attributable to ON Semiconductor Corporation	$ 11.6	$ 290.5	$ 61.0
Net income per common share attributable to ON Semiconductor Corporation:
Basic	$ 0.03	$ 0.67	$ 0.14
Diluted	$ 0.03	$ 0.65	$ 0.14
Weighted average common shares outstanding:
Basic	446.7	431.0	420.8
Diluted	457.2	444.4	432.1

Consolidated Statement Of Stockholder's Equity - USD ($) $ in Millions	2.625% Coupon Convertible Notes [Member] Additional Paid-In Capital [Member]	2.625% Coupon Convertible Notes [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Minority Interests In Consolidated Subsidiaries [Member]	Total
Balance at Dec. 31, 2008			$ 4.6	$ 2,810.7	$ (53.6)	$ (1,565.4)	$ (358.1)	$ 17.3	$ 855.5
Balance, shares at Dec. 31, 2008			457,542,365				(45,867,076)
Net income						61.0		2.3	63.3
Foreign currency translation adjustments					(11.5)				(11.5)
Amortization of prior year service costs					0.2				0.2
Comprehensive income									52.0
Issuance of common stock, for repurchase of debt			$ 0.1	28.5					28.6
Issuance of common stock, for repurchase of debt, shares			7,367,580
Stock option exercises				17.5					17.5
Stock option exercises, shares			3,956,366
Shares issued under the employee stock purchase plan				5.4					5.4
Shares issued under the employee stock purchase plan, shares			1,185,645
Restricted stock units issued, shares			4,322,800
Repurchase of treasury stock							$ (8.6)		(8.6)
Repurchase of treasury stock, shares							(1,259,359)
Stock based compensation expense				54.2					54.2
Warrant exercise				0.3			$ (0.3)
Warrant exercise, shares			52,950				(47,171)
Balance at Dec. 31, 2009			$ 4.7	2,916.6	(64.9)	(1,504.4)	$ (367.0)	19.6	1,004.6
Balance, shares at Dec. 31, 2009			474,427,706				(47,173,606)
Net income						290.5		2.4	292.9
Foreign currency translation adjustments					5.7				5.7
Amortization of prior year service costs					0.1				0.1
Comprehensive income									298.7
Issuance of common stock, for repurchase of debt, shares			1,020
Stock option exercises			$ 0.2	23.1					23.3
Stock option exercises, shares			4,054,373
Shares issued under the employee stock purchase plan				7.0					7.0
Shares issued under the employee stock purchase plan, shares			1,193,234
Restricted stock units issued, shares			6,227,767
Repurchase of treasury stock							$ (15.0)		(15.0)
Repurchase of treasury stock, shares							(1,956,317)
Stock based compensation expense				52.5					52.5
Extension of Zero Coupon Convertible Notes				13.3					13.3
Consideration for unvested stock options in connection with acquisition of California Micro Devices Corporation				3.6					3.6
Balance at Dec. 31, 2010			$ 4.9	3,016.1	(59.1)	(1,213.9)	$ (382.0)	22.0	1,388.0
Balance, shares at Dec. 31, 2010			485,904,100				(49,129,923)
Net income						11.6		3.3	14.9
Foreign currency translation adjustments					12.3				12.3
Amortization of prior year service costs					0.1				0.1
Comprehensive income									27.3
Stock option exercises			$ 0.1	59.3					$ 59.4
Stock option exercises, shares			8,734,690						8,700,000
Shares issued under the employee stock purchase plan				8.1					$ 8.1
Shares issued under the employee stock purchase plan, shares			1,152,778
Restricted stock units issued, shares			6,660,516
Repurchase of treasury stock							$ (19.3)		(19.3)
Repurchase of treasury stock, shares							(2,037,941)
Stock based compensation expense				33.5					33.5
2.625% Coupon Convertible Notes repurchase and exchange	$ (25.8)	$ (25.8)
2.625% Coupon Convertible Notes, Series B Notes issued	$ 22.3	$ 22.3
Balance at Dec. 31, 2011			$ 5.0	$ 3,113.5	$ (46.7)	$ (1,202.3)	$ (401.3)	$ 25.3	$ 1,493.5
Balance, shares at Dec. 31, 2011			502,452,084				(51,167,864)

Consolidated Statement Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 14.9	$ 292.9	$ 63.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	229.4	166.9	155.6
Gain on sale and disposal of fixed assets	(8.7)	(6.9)	(3.9)
Non-cash manufacturing expenses associated with favorable supply agreement	80.4
Loss on debt repurchase and exchange	23.2	0.7	3.1
Gain on acquisition of SANYO Semiconductor	(24.3)
Amortization of debt issuance costs and debt discount	2.3	2.5	3.1
Provision for excess inventories	49.1	10.0	20.4
Non-cash stock compensation expense	33.5	52.5	54.2
Non-cash interest	34.9	33.7	34.9
Non-cash asset impairment charges	86.3	3.9	6.3
Non-cash goodwill and intangible asset impairment charges		16.1
Recovery from insurance proceeds on property, plant and equipment	(13.3)
Non-cash portion of insurance gain	(23.9)
Deferred income taxes	(4.2)	2.6	0.7
Other	0.7	(1.8)	0.7
Changes in assets and liabilities (exclusive of the impact of acquisitions):
Receivables	89.1	(22.9)	(71.5)
Inventories	102.1	(84.0)	44.8
Other assets	(15.2)	(17.1)	(18.5)
Accounts payable	(109.7)	26.8	9.8
Accrued expenses	(37.4)	23.0	(6.3)
Income taxes payable	2.4		0.6
Accrued interest	(0.1)	(0.1)	(0.4)
Deferred income on sales to distributors	22.5	50.7	(15.4)
Other long-term liabilities	11.5	2.3	(2.2)
Net cash provided by operating activities	545.5	551.8	279.3
Cash flows from investing activities:
Purchases of property, plant and equipment	(316.4)	(188.9)	(55.3)
Purchase of businesses, net of cash acquired	(17.9)	(91.0)	(16.7)
Recovery from insurance on property, plant and equipment	13.3
Deposits utilized for purchases of property, plant and equipment	0.5	(2.2)	0.3
Proceeds from sales of property, plant and equipment	3.3	37.1	(3.2)
Proceeds from held-to-maturity securities	122.2	45.5	52.4
Purchase of held-to-maturity securities	(370.8)		(97.9)
Change in restricted cash	142.1	(136.2)	(5.9)
Net cash used in investing activities	(423.7)	(335.7)	(126.3)
Cash flows from financing activities:
Proceeds from issuance of common stock under the employee stock purchase plan	8.1	7.0	5.5
Proceeds from debt issuance	69.0	152.0	79.5
Proceeds from exercise of stock options	59.4	23.3	17.5
Payment of capital lease obligation	(39.0)	(32.3)	(29.5)
Purchase of treasury stock	(19.3)	(15.0)	(8.6)
Repayment of long-term debt	(103.3)	(254.4)	(150.6)
Net cash used in financing activities	(97.2)	(119.4)	(86.2)
Effect of exchange rate changes on cash and cash equivalents	5.0	0.9	0.2
Net increase in cash and cash equivalents	29.6	97.6	67.0
Cash and cash equivalents, beginning of period	623.3	525.7	458.7
Cash and cash equivalents, end of period	652.9	$ 623.3	$ 525.7
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Cash flows from financing activities:
Payments made in connection with exchange of 2.625% convertible senior subordinated notes due 2026	(15.9)
Repayment of long-term debt	$ (56.2)

Background And Basis Of Presentation	12 Months Ended
Background And Basis Of Presentation	Dec. 31, 2011
Background And Basis Of Presentation [Abstract]
Background And Basis Of Presentation	Note 1: Background and Basis of Presentation ON Semiconductor Corporation ("ON Semiconductor"), together with its wholly and majority-owned subsidiaries (the "Company"), is a premier supplier of high performance, silicon solutions for energy efficient electronics. The Company's broad portfolio of power and signal management, logic, discrete and custom devices helps customers efficiently solve their design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power applications.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Significant Accounting Policies

Note 2:

Significant Accounting Policies

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company, including its wholly-owned and majority-owned subsidiaries. Investments in companies that represent less than 20% of the related voting stock where the Company does not have the ability to exert significant influence are accounted for on a cost basis. All material intercompany accounts and transactions have been eliminated.

Use of Estimates

The preparation of financial statements in accordance with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Significant estimates have been used by management in conjunction with the (1) measurement of valuation allowances relating to trade and tax receivables, inventories and deferred tax assets; (2) estimates of future payouts for customer incentives, warranties, and restructuring activities; (3) assumptions surrounding future pension obligations and related trust returns; (4) the fair values of stock options and financial instruments (including derivative financial instruments); and (5) future cash flows associated with long-lived assets and goodwill impairment charges. Actual results could differ from these estimates.

Cash and cash equivalents

The Company considers all highly liquid investments with an original maturity to the Company of three months or less to be cash equivalents. Cash and cash equivalents are maintained with reputable major financial institutions. If, due to current economic conditions, one or more of the financial institutions with which the Company maintains deposits fails, the Company's cash and cash equivalents may be at risk. Deposits with these banks may exceed the amount of insurance provided on such deposits; however, these deposits typically may be redeemed upon demand and, therefore, bear minimal risk.

Short-Term Investments

Short-term investments have an original maturity to the Company between three months and one year, and are classified as held-to-maturity. Held-to-maturity securities are carried at amortized cost as it is the intent of the Company to hold these securities until maturity. Short-term investments classified as held-to-maturity as of December 31, 2011 were as follows (in millions):


	Balance at December 31, 2011
	Carried at Amortized Cost		Unrealized Gain/(Loss)			Fair Value
Short-term investments-held-to-maturity:
Commercial paper	$	101.0	$	(0.1	)	$	100.9
Corporate bonds		128.6		(0.1	)		128.5
Government agencies		19.0		—			19.0

	$	248.6	$	(0.2	)	$	248.4

Restricted Cash

In December 2010, the Company funded the escrow for the closing of the acquisition of SANYO Semiconductor Co., Ltd., a Japanese corporation ("SANYO Semiconductor") and subsidiary of SANYO Electric Co. Ltd., a Japanese corporation ("SANYO Electric") and other assets related to SANYO Electric's semiconductor business (the "SANYO Transaction") in the amount of $142.1 million. The $142.1 million was classified as restricted cash at December 31, 2010 and was paid to SANYO Electric on January 1, 2011.

Allowance for Doubtful Accounts

In the normal course of business, the Company provides unsecured credit terms to its customers. Accordingly, the Company maintains an allowance for doubtful accounts for possible losses on uncollectible accounts receivable. The Company routinely analyzes accounts receivable and considers history, customer creditworthiness, facts and circumstances specific to outstanding balances, current economic trends, and payment term changes when evaluating adequacy of the allowance for doubtful accounts. For uncollectible accounts receivable, the Company records a loss against the allowance for doubtful accounts only after exhaustive efforts have been made to collect and with management's approval. Generally, realized losses have been within the range of management's expectations.

Inventories

Inventories are stated at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or market. The Company records provisions for slow moving inventories based upon a regular analysis of inventory on hand compared to historical and projected end user demand. These provisions can influence results from operations. For example, when demand for a given part falls, all or a portion of the related inventory is reserved, impacting cost of revenues and gross profit. If demand recovers and the parts previously reserved are sold, a higher than normal margin will generally be recognized. However, the majority of product inventory that has been previously reserved is ultimately discarded. Although the Company does sell some products that have previously been written down, such sales have historically been relatively consistent on a quarterly basis and the related impact on the Company's margins has not been material. Additionally, general market conditions, as well as the Company's design activities, can cause certain of its products to become obsolete.

Property, Plant and Equipment

Property, plant and equipment are recorded at cost and are depreciated over estimated useful lives of 30-50 years for buildings and 3-20 years for machinery and equipment using accelerated and straight-line methods. Expenditures for maintenance and repairs are charged to operations in the year in which the expense is incurred. When assets are retired or otherwise disposed of, the related costs and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in operations in the period realized.

The Company evaluates the recoverability of the carrying amount of its property, plant and equipment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable. An impairment charge is recognized when the undiscounted expected cash flows derived from an asset are less than its carrying amount. Impairment losses are measured as the amount by which the carrying value of an asset exceeds its fair value and are recognized in operating results. Judgment is used when applying these impairment rules to determine the timing of the impairment test, the undiscounted cash flows used to assess impairments and the fair value of an impaired asset. The dynamic economic environment in which the Company operates and the resulting assumptions used to estimate future cash flows impact the outcome of these impairment tests.

Business Combination Purchase Price Allocation

The allocation of the purchase price of business combinations is based on management estimates and assumptions, and other information compiled by management, which utilizes established valuation techniques appropriate for the high-technology industry. These techniques include the income approach, cost approach or market approach, depending upon which approach is the most appropriate based on the nature and reliability available data. The income approach is predicated upon the value of the future cash flows that an asset is expected to generate over its economic life. The cost approach takes into account the cost to replace (or reproduce) the asset and the effects on the asset's value of physical, functional and/or economic obsolescence that has occurred with respect to the asset. The market approach is used to estimate value from an analysis of actual transactions or offerings for economically comparable assets available as of the valuation date.

Goodwill

Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the Company's acquisitions (see Note 3: "Goodwill and Intangible Assets" and Note 4: "Acquisitions" for further discussion).

Goodwill is evaluated for potential impairment on an annual basis or whenever events or circumstances indicate that impairment may have occurred, using a two-step process. The first step of the goodwill impairment test, used to identify potential impairment, compares the estimated fair value of the reporting unit containing goodwill with the related carrying amount. If the estimated fair value of the reporting unit exceeds its carrying amount, the reporting unit's goodwill is not considered to be impaired and the second step of the impairment test is unnecessary. If the reporting unit's carrying amount exceeds its estimated fair value, the second step of the test must be performed to measure the amount of the goodwill impairment loss, if any. The second step of the test compares the implied fair value of the reporting unit's goodwill, determined in the same manner as the amount of goodwill recognized in a business combination, with the carrying amount of such goodwill. If the carrying amount of the reporting unit's goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to that excess. The Company performs its annual impairment analysis as of the first day of the fourth quarter of each year. Adverse changes in operating results and/or unfavorable changes in economic factors used to estimate fair values could result in a non-cash impairment charge in the future.

The Company has determined that its product families, which are components of its operating segments, constitute reporting units for purposes of allocating and testing goodwill. As of each acquisition date, all goodwill was assigned to the product families that were expected to benefit from the synergies of the respective acquisition. The amount of goodwill assigned to each reporting unit was the difference between the fair value of the reporting unit and the fair value of identifiable assets and liabilities allocated to the reporting unit as of the acquisition date. The Company determined the fair value of a reporting unit using the income approach, which is based on the present value of estimated future cash flows using management's assumptions and forecasts as of the acquisition date

Intangible Assets

The Company's acquisitions resulted in intangible assets consisting of values assigned to intellectual property, assembled workforce, customer relationships, non-compete agreements, patents, developed technology, trademarks, acquired software and in-process research and development ("IPRD"). These are stated at cost less accumulated amortization, are amortized over their economic useful lives ranging from less than 1 year to 18 years, using the straight-line method, and are reviewed for impairment when facts or circumstances suggest that the carrying value of these assets may not be recoverable. See Note 3: "Goodwill and Intangible Assets" for further discussion.

Debt Issuance Costs

Debt issuance costs are capitalized and amortized over the term of the underlying agreements using the effective interest method. Upon prepayment of debt, the related unamortized debt issuance costs are charged to expense (see Note 8: "Long-Term Debt—Loss on Debt Repurchase"). Amortization of debt issuance costs is included in interest expense while the unamortized balance is included in other assets. Capitalized debt issuance costs totaled $6.2 million and $7.0 million at December 31, 2011 and 2010, respectively.

Revenue Recognition

The Company generates revenue from sales of its semiconductor products to original equipment manufacturers ("OEMs"), electronic manufacturing service providers and distributors. The Company also generates revenue, although to a much lesser extent, from manufacturing services provided to customers. The Company recognizes revenue on sales to OEMs and electronic manufacturing service providers and sales of manufacturing services, net of provisions for related sales returns and allowances, when persuasive evidence of an arrangement exists, title and risk of loss pass to the customer (which is generally upon shipment), the price is fixed or determinable and collectability is reasonably assured. Title to products sold to distributors typically passes at the time of shipment by the Company, so the Company records accounts receivable for the amount of the transaction, reduces its inventory for the products shipped and defers the related margin in its consolidated balance sheet. The Company recognizes the related revenue and cost of revenues when it is informed by the distributor that it has resold the products to the end user. As a result of the Company's inability to reliably estimate up front the effects of the returns and allowances with these distributors, the Company defers the related revenue and margin on sales to these distributors. For distributors that are not entitled to returns and allowances, the Company recognizes revenue when title passes. Although payment terms vary, most distributor agreements require payment within 30 days.

Taxes assessed by government authorities on revenue-producing transactions, including value added and excise taxes, are presented on a net basis (excluded from revenues) in the statement of operations.

Sales returns and allowances are estimated based on historical experience. The Company's OEM customers do not have the right to return products, other than pursuant to the provisions of the Company's standard warranty. Sales to distributors, however, are typically made pursuant to agreements that provide return rights with respect to discontinued or slow-moving products. Under the Company's general agreements, distributors are allowed to return any product that has been removed from the price book. In addition, agreements with distributors typically contain standard stock rotation provisions permitting limited levels of product returns. However, since the Company defers recognition of revenue and gross profit on sales to distributors until the distributor resells the product, due to the inability to reliably estimate up front the effect of the returns and allowances with these distributors, sales returns and allowances have minimal impact on the results of operations. Provisions for discounts and rebates to customers, estimated returns and allowances, and other adjustments are provided for in the same period the related revenues are recognized, and are netted against revenues. Given that revenues consist of a high volume of relatively similar products, actual returns and allowances and warranty claims have not traditionally fluctuated significantly from period to period, and returns and allowances and warranty provisions have historically been reasonably accurate.

The Company generally warrants that products sold to its customers will, at the time of shipment, be free from defects in workmanship and materials and conform to approved specifications. The Company's standard warranty extends for a period that is the greater of (i) three years from the date of shipment or (ii) the period of time specified in the customer's standard warranty (provided that the customer's standard warranty is stated in writing and extended to purchasers at no additional charge). At the time revenue is recognized, the Company establishes an accrual for estimated warranty expenses associated with its sales, recorded as a component of cost of revenues. In addition, the Company also offers cash discounts to customers for payments received within an agreed upon time, generally 10 days after shipment. The Company accrues reserves for cash discounts as a reduction to accounts receivable and a reduction to revenues, based on experience with each customer.

Freight and handling costs are included in cost of revenues and are recognized as period expense during the period in which they are incurred.

Research and Development Costs

Research and development costs are expensed as incurred.

Share-Based Compensation

Share-based compensation cost is measured at the grant date, based on the estimated fair value of the award, and is recognized as expense over the employee's requisite service period. As of December 31, 2011, the Company had no unvested awards with market conditions, although it did have outstanding awards with performance, time and service based vesting provisions. See Note 11: "Share-Based Compensation" for further discussion.

Income Taxes

Income taxes are accounted for using the asset and liability method. Under this method, deferred income tax assets and liabilities are recognized for the future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred income tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which these temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided for those deferred tax assets for which management cannot conclude that it is more likely than not that such deferred taxes will be realized.

In determining the amount of the valuation allowance, estimated future taxable incomes, as well as feasible tax planning strategies in each taxing jurisdiction are considered. If all or a portion of the remaining deferred tax assets will not be realized, the valuation allowance will be increased with a charge to income tax expense. Conversely, if the Company will ultimately be able to utilize all or a portion of the deferred tax assets for which a valuation allowance has been provided, the related portion of the valuation allowance will be released to income as a credit to income tax expense.

The calculation of tax liabilities involves dealing with uncertainties in the application of complex global tax regulations. The Company recognizes potential liabilities for anticipated tax audit issues in the United States and other tax jurisdictions based on its estimate of whether, and the extent to which, additional taxes will be due. If payment of these liabilities ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. Additionally, the Company reviews the collectability of its tax receivables due from various jurisdictions and when recovery is uncertain, the Company reserves amounts deemed to be uncollectable. If the receipts of these amounts occur or are assured, the reversal of the reserves previously established would result in a tax benefit in the period.

The Company (both directly and through its subsidiaries) files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years prior to 2005.

Foreign Currencies

Most of the Company's foreign subsidiaries conduct business primarily in U.S. dollars and as a result, utilize the dollar as their functional currency. For the translation of financial statements of these subsidiaries, assets and liabilities in foreign currencies that are receivable or payable in cash are translated at current exchange rates, while inventories and other non-monetary assets in foreign currencies are translated at historical rates. Gains and losses resulting from the translation of such financial statements are included in the operating results, as are gains and losses incurred on foreign currency transactions.

The Company's Japanese subsidiaries utilize Japanese Yen as their functional currency. The assets and liabilities of these subsidiaries are translated at current exchange rates, while revenues and expenses are translated at the average rates in effect for the period. The related translation gains and losses are included in accumulated other comprehensive gain or loss within stockholders' equity.

Defined Benefit Plans

The Company maintains pension plans, covering certain of its foreign employees. For financial reporting purposes, net periodic pension costs are calculated based upon a number of actuarial assumptions, including a discount rate for plan obligations, assumed rate of return on pension plan assets and assumed rate of compensation increases for plan employees. All of these assumptions are based upon management's judgment and consultation with an actuary, considering all known trends and uncertainties. See Note 12: "Employee Benefit Plans" for further discussion.

Multi-Employer Benefit Plans

The Company participates in several multi-employer defined pension plans. The Company intends to withdraw from certain of these plans. The estimated withdrawal liabilities are accounted for as net underfunded liabilities and estimated using actuarial assumptions similar to those used to estimate liabilities associated with the defined benefit pension plans. For the multi-employer plans from which the Company does not intend to withdraw, expenses are recognized as the contributions to the plans become due. See Note 12: "Employee Benefit Plans" for further discussion.

Contingencies

The Company is involved in a variety of legal matters that arise in the normal course of business. Based on information available, management evaluates the relevant range and likelihood of potential outcomes and records the appropriate liability when the amount is deemed probable and reasonably estimable.

Fair Value Measurement

Fair value is the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy is based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value, as follows:

•

Level 1—Quoted prices in active markets for identical assets or liabilities;

•

Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities;

•

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Companies may choose to measure certain financial instruments and certain other items at fair value. Unrealized gains and losses on items for which the fair value option has been elected must be reported in earnings. The Company elected not to measure such financial instruments at fair value.

Goodwill And Intangible Assets

12 Months Ended

Dec. 31, 2011

Goodwill And Intangible Assets [Abstract]

Goodwill And Intangible Assets

Note 3: Goodwill and Intangible Assets

Goodwill

Goodwill is tested for impairment annually on the first day of the fourth quarter. During the first step of the Company's annual impairment analysis in the fourth quarters of 2011 and 2009, the Company determined that the carrying amount of the Company's goodwill for all reporting units was recoverable; however, during the first step of the Company's annual impairment analysis in the fourth quarter of 2010, the Company determined that the carrying value of the Company's goodwill for one of its product families might not have been recoverable. After completing the second step of the Company's 2010 impairment analysis for the one product family, the Company recognized a goodwill impairment charge of $8.9 million in what is now the Company's automotive, industrial, medical and mil-aero product operating segment. The impairment charge resulted from a decline in the operating results of this one product family.

The Company uses the income approach, based on estimated future cash flows, to perform the goodwill impairment test. These estimates include assumptions about future conditions such as future revenues, gross profits, operating expenses, and industry trends. The Company considers other valuation methods, such as the cost approach or market approach, less desirable than the income approach to perform the goodwill impairment test because there are no stand-alone companies that exclusively sell the products that are similar to those sold by the Company's reporting units. The material assumptions used for the income approach for 2011, 2010 and 2009 were five years of projected net cash flows, a discount rate of 14.0%, 13.0% and 11.2%, respectively, and a long-term growth rate of 3.9%, 3.9% and 3.5%, respectively. The Company considered historical rates and current market conditions when determining the discount and growth rates to use in the Company's analyses.

The following table summarizes the original goodwill by relevant operating segment as of December 31, 2011 and December 31, 2010 (in millions):


	Balance as of December 31, 2011										Balance as of December 31, 2010
	Original Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value		Original Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value
Operating Segment:
Automotive, Industrial, Medical and Mil-Aero	$	556.6	$	(4.2	)	$	(406.0	)	$	146.4	$	549.1	$	(4.2	)	$	(406.0	)	$	138.9
Computing & Consumer Products		29.1		(5.6	)		—			23.5		29.1		(5.6	)		—			23.5
Standard Products		37.7		—			(8.9	)		28.8		37.7		—			(8.9	)		28.8

	$	623.4	$	(9.8	)	$	(414.9	)	$	198.7	$	615.9	$	(9.8	)	$	(414.9	)		191.2

The following table summarizes the change in goodwill from December 31, 2010 to December 31, 2011 (in millions):


Net balance as of December 31, 2010	$	191.2
Additions due to business combination		7.5

Net balance as of December 31, 2011	$	198.7

Intangible Assets

Intangible assets, net were as follows as of December 31, 2011 and December 31, 2010 (in millions):


	December 31, 2011
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(8.0	)	$	—		$	—		$	5.9		5-12
Assembled workforce		6.7		(6.7	)		—			—			—		5
Customer relationships		280.3		(71.9	)		(26.5	)		(3.2	)		178.7		5-18
Patents		43.7		(10.4	)		—			—			33.3		12
Developed technology		145.6		(35.5	)		—			(2.0	)		108.1		5-12
Trademarks		14.0		(3.4	)		—						10.6		15
In-process research and development		3.1		—			—			(2.5	)		0.6
Backlog		0.8		(0.8	)		—			—			—		0.3

Total intangibles	$	508.1	$	(136.7	)	$	(26.5	)	$	(7.7	)	$	337.2


	December 31, 2010
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.0	)	$	—		$	—		$	6.9		5-12
Assembled workforce		6.7		(6.1	)		—			—			0.6		5
Customer relationships		250.5		(51.2	)		(27.2	)		(3.2	)		168.9		5-18
Patents		16.7		(4.2	)		—			—			12.5		12
Developed technology		113.0		(22.5	)		—			(2.0	)		88.5		5-12
Trademarks		11.0		(1.7	)		—			—			9.3		15
In-process research and development		18.3		—			—			(2.0	)		16.3

Total intangibles	$	430.1	$	(92.7	)	$	(27.2	)	$	(7.2	)	$	303.0

Amortization expense for intangible assets amounted to $43.8 million for the year ended December 31, 2011, of which $1.1 million was included in cost of revenues; $34.1 million for the year ended December 31, 2010, of which $2.4 million was included in cost of revenues; and $31.3 million for the year ended December 31, 2009, of which $2.3 million was included in cost of revenues. The Company is currently amortizing thirteen projects totaling $32.8 million through developed technology relating to projects that were originally classified as IPRD at the time of acquisition, but which have been completed, over a weighted average useful life of 8.6 years. Amortization expense for intangible assets, with the exception of the remaining $0.6 million of in-process research and development assets that will be amortized once the corresponding projects have been completed, is expected to be as follows over the next five years, and thereafter (in millions):


	Total
2012	$	44.3
2013		39.6
2014		38.4
2015		37.3
2016		34.4
Thereafter		142.6

Total estimated amortization expense	$	336.6

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Acquisitions

12 Months Ended

Dec. 31, 2011

Acquisitions [Abstract]

Acquisitions

Note 4: Acquisitions

Acquisition of SANYO Semiconductor Co., Ltd.

On January 1, 2011, the Company paid SANYO Electric $142.1 million in cash (using restricted cash as of December 31, 2010) and issued a $377.5 million note payable to SANYO Electric, through its subsidiary, Semiconductor Components, LLC ("SCI LLC"), and as a result SANYO Semiconductor became a wholly-owned subsidiary of the Company. During 2011, the Company received $39.7 million in cash from SANYO Electric of which $19.0 million was considered in the initial purchase accounting estimates relating to funding adjustments for working capital and pension levels, as defined in the purchase agreement, as well as certain adjustments to conform to the Company's accounting policies. As a result of these adjustments, the purchase price has been reduced from $500.6 million to $479.9 million as of December 31, 2011.

SANYO Semiconductor designs, manufactures and sells discrete components, hybrid integrated circuits, radio frequency and power related products as well as custom integrated circuits. Many of these devices fall into the Company's existing product categories; however, SANYO Semiconductor expands the Company's capacity in microcontrollers and custom application specific integrated circuits ("ASICs") for the consumer, automotive and industrial end-markets. SANYO Semiconductor also expands the Company's presence in the Japan market.

The following table presents the initial allocation of the purchase price and subsequent adjustments applied on a retrospective basis based on the estimated fair values of the net assets acquired of SANYO Semiconductor (in millions):


	Initial Estimate			Adjustments			Final
Cash and cash equivalents	$	117.1		$	—		$	117.1
Receivables, net		242.1			—			242.1
Inventories		423.9			(23.6	)		400.3
Deferred income taxes current		0.5			—			0.5
Other current assets		119.2			—			119.2
Property, plant and equipment		148.0			(1.3	)		146.7
Deferred income taxes, non-current		60.5			—			60.5
Intangible assets		55.7			—			55.7
Other non-current assets		14.9			—			14.9

Total assets acquired		1,181.9			(24.9	)		1,157.0

Accounts payable		(300.0	)		—			(300.0	)
Deferred income taxes, current		(70.3	)		1.5			(68.8	)
Other current liabilities		(61.3	)		(21.9	)		(83.2	)
Deferred income taxes, non-current		(0.5	)		—			(0.5	)
Long-term accrued liabilities		(187.9	)		(12.4	)		(200.3	)

Total liabilities assumed		(620.0	)		(32.8	)		(652.8	)
Net assets acquired		561.9			(57.7	)		504.2
Gain on acquisition		(61.3	)		37.0			(24.3	)

Purchase price	$	500.6		$	(20.7	)	$	479.9

The acquisition was accounted for as a business purchase pursuant to ASC Topic 805, Business Combinations. Under this ASC, acquisition and integration costs are not included as components of consideration transferred, but are accounted for as expenses in the period in which the costs are incurred.

Accounting standards require that when the fair value of the net assets acquired exceeds the purchase price, resulting in a bargain purchase gain, the acquirer must reassess the reasonableness of the values assigned to all of the net assets acquired, liabilities assumed and consideration transferred. The Company has performed such a reassessment and has concluded that the values assigned for the SANYO Semiconductor acquisition are reasonable. In the first quarter ended April 1, 2011, the Company originally reported a gain of $61.3 million which has been retrospectively adjusted to $24.3 million as reflected in the table above. The decrease in the gain is the result of the recognition of certain employee related benefit liabilities and certain adjustments to conform to the Company's accounting policies, partially offset by the cash payment from SANYO Electric in the second quarter of 2011. Consequently, the Company has recorded a $24.3 million bargain purchase gain on the SANYO Semiconductor acquisition. The Company believes the gain realized in purchase accounting was the result of a number of factors, including the following: SANYO Electric wanted to exit its semiconductor operations, historical losses recognized by SANYO Electric, SANYO Electric viewed this as the best outcome for SANYO Semiconductor and the fact that the Company will incur expenses associated with the transfer and consolidation of certain operations.

The $55.7 million of acquired intangible assets were assigned a weighted-average useful life of approximately 8.8 years. The intangible assets that make up that amount include: patents of $27.0 million (5.5-year weighted average useful life), $3.0 million of trademarks (3.0-year weighted average useful life) and customer relationships of $25.7 million (13-year weighted average useful life). Other current assets acquired includes $80.0 million representing the estimated fair value of a favorable supply arrangement provided by SANYO Electric to the Company in the form of operational cost reduction to the acquired business during the period of time it is effectively required to utilize certain SANYO Electric seconded employees and manufacturing facilities in Japan. This asset has been charged to cost of goods sold over the period of benefit, which was the first 5 months of 2011. The amortization recorded totaled $80.4 million as a result of foreign currency exchange rate changes over the recognition period.

Included in the final allocation of net assets acquired are long-term liabilities assumed representing approximately $50.9 million of underfunded pension obligations relating to existing defined benefit pension plans as well as $144.9 million representing estimated liabilities associated with the Company's estimated portion of underfunded pension obligations relating to certain employees participating in the SANYO Electric or affiliate multiemployer defined benefit pension plan from which the Company intends to withdraw. The Company is in the process of establishing defined benefit pension plans which are intended to provide similar retirement benefits as the SANYO Electric sponsored multiemployer plans and expects to withdraw from the SANYO Electric sponsored multiemployer plans by December 31, 2012.

The estimated allocation of the purchase price is based on management estimates and assumptions, and other information compiled by management, which utilized established valuation techniques appropriate for the high-technology industry. The income approach, cost approach or market approach was used based on the nature of the asset or liability and reliability of the data available.

The following presentation of unaudited pro forma consolidated results of operations for the year ended December 31, 2010 has been prepared as if the acquisition of SANYO Semiconductor had occurred on January 1, 2010 and includes adjustments for depreciation expense, amortization of intangibles and the tax effect of such items (in millions, except per share data):


	Proforma For Year Ended December 31, 2010
Net Revenues	$	3,848.2
Net Income	$	104.1
Net income per common share — Basic	$	0.24
Net income per common share — Diluted	$	0.23

Acquisition of the CMOS Image Sensor Business Unit from Cypress Semiconductor

On February 27, 2011, the Company acquired 100% of the CMOS Image Sensor Business Unit (the "ISBU") from Cypress Semiconductor Corporation, for approximately $34.1 million in cash. The ISBU business includes a broad portfolio of high-performance custom and standard image sensors used in multi-megapixel machine vision, linear and two dimensional (2D) bar code imaging, medical x-ray imaging, biometrics, digital photography and cinematography, and aerospace applications. The acquired products include the VITA, LUPA, STAR and IBIS families, which are all well known throughout the industry.

The following table presents the allocation of the purchase price of the ISBU to the assets acquired on February 27, 2011 based on their fair values (in millions):


	Initial Estimate			Adjustments			Final
Cash and cash equivalents	$	1.5					$	1.5
Receivables, net		2.6						2.6
Inventories		9.2						9.2
Other current assets		0.4						0.4
Property, plant and equipment		1.2						1.2
Goodwill		8.0			(0.5	)		7.5
Intangible assets		11.2						11.2
In-process research and development		11.2						11.2

Total assets acquired		45.3			(0.5	)		44.8

Accounts payable		(5.6	)					(5.6	)
Other current liabilities		(4.2	)		0.5			(3.7	)
Other non-current liabilities		(1.4	)					(1.4	)

Total liabilities assumed		(11.2	)		0.5			(10.7	)

Net assets acquired	$	34.1		$	—		$	34.1

Of the $22.4 million of acquired intangible assets, $11.2 million was assigned to IPRD assets that will be amortized over the useful life upon successful completion of the projects or expensed if impaired. The value assigned to IPRD was determined by considering the importance of products under development to the overall development plan, estimating costs to develop the purchased IPRD into commercially viable products, estimating the resulting net cash flows from the projects when completed and discounting the net cash flows to their present value. The fair value of IPRD was determined using the income approach. The income approach recognizes that the current value of an asset or liability is premised on the expected receipt or payment of future economic benefits generated over its remaining life. A discount rate of 17.5% was used in the present value calculations, and was derived from a weighted-average cost of capital analysis, adjusted to reflect the risks inherent in the acquired research and development operations.

The remaining $11.2 million of acquired intangible assets have a weighted-average useful life of approximately 6.1 years. The intangible assets that make up the amount include: customer relationships of $4.2 million (6.0-year weighted average useful life), developed technology of $6.2 million (7.0-year weighted average useful life) and backlog of $0.8 million (0.3-year weighted average useful life).

Of the total purchase price of approximately $34.1 million, approximately $7.5 million has been allocated to goodwill. Among the factors that contributed to goodwill arising from the acquisition were the potential synergies expected to be derived from combining the ISBU business with the Company's existing sensor business. These relationships provided and continue to provide the capability of selling advanced technology of next generation products to the market place. Goodwill will not be amortized but instead tested for impairment at least annually (more frequently if certain indicators are present). The $7.5 million of goodwill as of December 31, 2011 was assigned to the digital and mixed signal product group, none of which is expected to be deductible for tax purposes.

The allocation of purchase price is based on management estimates and assumptions, and other information compiled by management, which utilized established valuation techniques appropriate for the high-technology industry. The valuation technique used was the income approach, cost approach or market approach, as it was determined to be the most appropriate based on the nature of the asset or liability and reliability of the data available.

The Company has determined that pro forma results of operations for the ISBU are not significant for disclosure.

Acquisition of Sound Design Technologies LTD

On June 9, 2010, the Company acquired 100% of Sound Design Technologies Ltd. ("SDT"), for $22.0 million in cash for all outstanding stock, and recorded a contingent liability of $1.8 million representing the estimated fair value pursuant to its obligations under an earnout agreement if SDT is able to meet certain revenue objectives in 2010 through 2012. The range of initial potential earn-out payments during the period from 2010 to 2012 is from zero to $10.0 million. During 2011, it was determined based on performance that the earn out potential was zero. SDT is a leading designer and manufacturer of ultra-low-power semiconductor solutions for hearing aids and portable, battery-powered DSP applications, and a leading provider of advanced high density interconnected technologies used in custom minimizing packages. SDT's advanced manufacturing expertise in chip-scale capacitors and high density packaging will expand the Company's capabilities in delivering advanced, highly miniaturized packaging technology. SDT's results of operations have been included in the consolidated financial statements since the date of the acquisition.

The following table presents the allocation of the purchase price of SDT to the assets acquired based on their fair values (in millions):


Receivables, net	$	3.3
Inventories		7.8
Other current assets		1.0
Property, plant and equipment		2.7
Goodwill		5.9
Intangible assets		2.4
In-process research and development		2.8
Other non-current assets		2.0

Total assets acquired		27.9

Accounts payable		(2.2	)
Other current liabilities		(1.9	)

Total liabilities assumed		(4.1	)

Net assets acquired	$	23.8

Of the $5.2 million of acquired intangible assets, $2.8 million was assigned to IPRD assets that will be amortized over the useful life upon successful completion of the projects or expensed if impaired. The value assigned to IPRD was determined by considering the importance of products under development to the overall development plan, estimating costs to develop the purchased IPRD into commercially viable products, estimating the resulting net cash flows from the projects when completed and discounting the net cash flows to their present value. The fair value of IPRD was determined using the income approach. The income approach recognizes that the current value of an asset or liability is premised on the expected receipt or payment of future economic benefits generated over its remaining life. A discount rate of 9.0% was used in the present value calculations, and was derived from a weighted-average cost of capital analysis, adjusted to reflect the risks inherent in the acquired research and development operations.

The remaining $2.4 million of acquired intangible assets have a weighted-average useful life of approximately 10 years. The intangible assets that make up the amount include: customer relationships of $1.7 million (15.5-year weighted average useful life) and developed technology of $0.7 million (5.0-year weighted average useful life).

Of the total purchase price of approximately $23.8 million, approximately $5.9 million was initially allocated to goodwill. Among the factors that contributed to goodwill arising from the acquisition were the potential synergies expected to be derived from combining SDT's design and manufacturing business with the Company's medical business. These relationships provided and continue to provide the Company with the capability of selling advanced technology of next generation products to the market place. The $8.7 million of goodwill as of December 31, 2011, was assigned to the automotive, industrial, medical and mil-aero products group, none of which is expected to be deductible for tax purposes.

The allocation of purchase price is based on management estimates and assumptions, and other information compiled by management, which utilized established valuation techniques appropriate for the high technology industry. The valuation technique used was determined to be the income approach, cost approach or market approach, based on the nature of the asset or liability and reliability of the data available.

The Company has determined that pro forma results of operations for SDT are not significant for disclosure.

Acquisition of California Micro Devices Corporation

On January 27, 2010, the Company acquired 100% of California Micro Devices Corporation ("CMD"), through purchasing all of CMD's issued and outstanding shares of common stock at a purchase price of $4.70 per share, for a total cash payment of approximately $109.5 million and $3.7 million of estimated fair value of stock options and restricted stock, for total consideration of $113.2 million. CMD's business is primarily engaged in application specific integrated passive ("ASIP") devices in the wireless, computing and consumer electronics end-markets. In addition, CMD's expertise in protection solutions for the high brightness LED ("HBLED") market, and its strengths in inductor capacitor-based electromagnetic interface ("EMI") filtering and low capacitance electrostatic discharge ("ESD") protection, complement the Company's existing portfolio of protection and lighting solutions.

The following table presents the allocation of the purchase price of CMD to the assets acquired based on their fair values (in millions):


Cash and cash equivalents	$	42.8
Receivables, net		5.0
Inventories		9.0
Other current assets		2.0
Property, plant and equipment		1.7
Goodwill		20.3
Intangible assets		21.7
In-process research and development		18.6
Other non-current assets		0.1

Total assets acquired		121.2

Accounts payable		(6.2	)
Other current liabilities		(1.6	)
Long-term accrued liabilities		(0.2	)

Total liabilities assumed		(8.0	)

Net assets acquired	$	113.2

Of the $40.3 million of acquired intangible assets, $18.6 million was assigned to IPRD assets that will be amortized over the useful life upon successful completion of the projects or expensed, if impaired. The value assigned to IPRD was determined by considering the importance of products under development to the overall development plan, estimating costs to develop the purchased IPRD into commercially viable products, estimating the resulting net cash flows from the projects when completed and discounting the net cash flows to their present value. The fair value of IPRD was determined using the income approach. The income approach recognizes that the current value of an asset or liability is premised on the expected receipt or payment of future economic benefits generated over its remaining life. A discount rate of 13.2% was used in the present value calculations, and was derived from a weighted-average cost of capital analysis, adjusted to reflect additional risks inherent in the acquired research and development operations.

The remaining $21.7 million of acquired intangible assets consist of: (i) developed technology of $17.7 million (8-year weighted-average useful life) and (ii) customer relationships of $4.0 million (10-year weighted average useful life).

Of the total purchase price paid of $113.2 million, approximately $20.3 million was allocated to goodwill. Among the factors that contributed to goodwill arising from the acquisition was the acquisition of an assembled workforce of experienced semiconductor engineers. These experienced engineers provided and continue to provide the capability of developing and integrating advanced technology into next generation products. The balance as of December 31, 2011 was $20.3 million of goodwill assigned to the standard products group, none of which is expected to be deductible for tax purposes.

The allocation of the purchase price was based on management estimates and assumptions, and other information compiled by management, which utilized established valuation techniques appropriate for the high-technology industry. The valuation technique used was the income approach, cost approach or market approach, based on the nature of the asset or liability and reliability of the data available.

The Company has determined that pro forma results of operations for CMD are not significant for disclosure.

Additionally, the Company has determined that, in aggregate, pro forma results of operations for SDT and CMD are not significant for disclosure.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1383-128463

+ Details

New Accounting Pronouncements	12 Months Ended
New Accounting Pronouncements	Dec. 31, 2011
New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	Note 5: New Accounting Pronouncements *Adoption of Accounting Standards Update ("ASU") No. 2011-08 — "Intangibles — Goodwill and Other (Topic 350): Testing Goodwill for Impairment" ("ASU 2011-08")* In September 2011, the Financial Accounting Standards Board ("FASB") issued ASU 2011-08, which is intended to reduce the complexity and cost of performing an evaluation of impairment of goodwill. Under the new guidance, an entity will have the option of first assessing qualitative factors (events and circumstances) to determine whether it is more likely than not (meaning a likelihood of more than 50 percent) that the fair value of a reporting unit is less than its carrying amount. If, after considering all relevant events and circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test will be unnecessary. The amendments will be effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011, although early adoption is permitted. The adoption of this pronouncement is not expected to have a material impact on the Company's consolidated financial statements. *Adoption of ASU No. 2011-09 — "Compensation — Retirement Benefits — Multiemployer Plans (Subtopic 715-80)" ("ASU 2011-09")* In September 2011, the FASB issued ASU 2011-09, which requires that employers provide additional separate disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans. The additional quantitative and qualitative disclosures will provide users with more detailed information about an employer's involvement in multiemployer pension plans. The amendments are effective for annual disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans for fiscal years ending after December 15, 2011. The adoption of this standard expanded our consolidated financial statement footnote disclosures, but otherwise did not have a material impact on our financial statements. *Adoption of ASU No. 2010-17, "Revenue Recognition — Milestone Method" ("ASU 2010-17")* In April 2010, the FASB issued ASU 2010-17, which is included in ASC 605—Milestone Method of Revenue Recognition. This ASU codifies the consensus reached in Emerging Issues Task Force 08-09, "Milestone Method of Revenue Recognition," and addresses the accounting when entities enter into revenue arrangements with multiple payment streams for a single deliverable or a single unit of accounting. The pronouncement shall be applied prospectively to milestones achieved in fiscal years, and interim periods within those years, beginning after June 15, 2010, with earlier application and retrospective application permitted. The adoption of this pronouncement did not have a material impact on the Company's consolidated financial statements. *Adoption of ASU No. 2010-29, "Business Combinations (Topic 805): Disclosure of Supplementary Pro Forma Information for Business Combinations" ("ASU 2010-29")* In December 2010, the FASB issued ASU 2010-29. The amendments in this update are effective prospectively for business combinations for which the acquisition date is on or after the beginning of the first annual reporting period beginning on or after December 15, 2010. The adoption of this pronouncement affected the Company's disclosure related to its acquisitions. ASU No. 2011-04, "Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. Generally Accepted Accounting Principles and IFRS" ("ASU 2011-04") ASU 2011-04 generally provides a uniform framework for fair value measurements and related disclosures between generally accepted accounting principles and international financial reporting standards ("IFRS"). Additional disclosure requirements in the update include: (1) for Level 3 fair value measurements, quantitative information about the unobservable inputs used, a description of the valuation processes used by the entity, and a qualitative discussion about the sensitivity of the measurements to changes in the unobservable inputs; (2) for an entity's use of a nonfinancial asset that is different from the asset's highest and best use, the reason for the difference; (3) for financial instruments not measured at fair value but for which disclosure of fair value is required, the fair value hierarchy level in which the fair value measurements were determined; and (4) the disclosure of all transfers between Level 1 and Level 2 of the fair value hierarchy. ASU 2011-04 will be effective for interim and annual periods beginning on or after December 15, 2011, which for the Company will be its first quarter of 2012. The Company is currently evaluating the impact that ASU 2011-04 will have on its financial statements. ASU No. 2011-05, "Comprehensive Income (Topic 220): Presentation of Comprehensive Income" ("ASU 2011-05") and ASU 2011-12 "Comprehensive Income (Topic 220): Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05" ("ASU 2011-12") ASU 2011-05 allows an entity to present components of net income and other comprehensive income in one continuous statement, referred to as the statement of comprehensive income, or in two separate, but consecutive statements. The new guidance eliminates the current option to report other comprehensive income and its components in the statement of changes in equity. While ASU 2011-05 changes the presentation of comprehensive income, there are no changes to the components that are recognized in net income or other comprehensive income under current accounting guidance. In December 2011, the FASB issued ASU 2011-12 , which deferred certain aspects of ASU 2011-05. The new guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company will adopt this guidance in the first quarter of fiscal 2012. The adoption of ASU 2011-05 and the deferrals in ASU 2011-12 are not expected to have a material impact on the Company's Consolidated Financial Statements.

Restructuring, Asset Impairments And Other, Net

12 Months Ended

Dec. 31, 2011

Restructuring, Asset Impairments And Other, Net [Abstract]

Restructuring, Asset Impairments And Other, Net

Note 6: Restructuring, Asset Impairments and Other, Net

A summary description of the activity included in the "Restructuring, Asset Impairments and Other, Net" caption on the consolidated statement of operations for the years ended December 31, 2011, 2010 and 2009 are as follows (in millions):


	Restructuring			Asset Impairment		Other			Total
Year Ended December 31, 2011
Thailand facility closure	$	5.7		$	24.8	$	(18.6	)	$	11.9
Aizu facility closure		6.5			61.5		2.0			70.0
2011 SANYO acquisition		10.0			—		—			10.0
Japan earthquake and tsunami		—			—		4.8			4.8
Phoenix wafer manufacturing facility closure		4.3			—		—			4.3
2011 global workforce reduction		2.5			—		—			2.5
Lease termination adjustment		(1.3	)		—					(1.3	)
IPRD project write-off		—			—		0.5			0.5

Total	$	27.7		$	86.3	$	(11.3	)	$	102.7

Year Ended December 31, 2010
2010 acquisition of SDT	$	2.2		$	—	$	—		$	2.2
2010 acquisition of CMD		3.5			0.1		—			3.6
Cost basis investment write-off		—			—		3.9			3.9
Other		0.3			0.1		0.4			0.8

Total	$	6.0		$	0.2	$	4.3		$	10.5

Year Ended December 31, 2009
2009 global workforce reduction	$	12.6		$	0.4	$	—		$	13.0
Piestany, Slovakia facility closure		1.7			1.7		5.4			8.8
2009 Belgium workforce reduction		3.9			—		—			3.9
Gain on sale of intellectual property		—			—		(2.0	)		(2.0	)
Gain on settlement of two legal matters		—			—		(2.5	)		(2.5	)
Other		1.0			2.0		0.7			3.7

Total	$	19.2		$	4.1	$	1.6		$	24.9

The following is a rollforward of the accrued restructuring charges from December 31, 2010 to December 31, 2011 (in millions):


	Balance as of December 31, 2010		Charges		Usage			Adjustments			Balance as of December 31, 2011
Estimated employee separation charges	$	1.4	$	25.8	$	(18.3	)	$	—		$	8.9

Estimated costs to exit	$	9.9	$	3.3	$	(3.3	)	$	(1.5	)	$	8.4

The activity related to the Company's restructuring, asset impairments and other, net for programs that were either initiated in 2011 or had not been completed as of December 31, 2011, are as follows:

Thailand Facility Closure

Cumulative charges of $11.9 million, net of adjustments, have been recognized through December 31, 2011, related to the 2011 announced plan to close our probe, assembly and test operations in Ayutthaya, Thailand and to partially close our Bang Pa In, Thailand facility as a result of the recent flooding in these regions. During the year ended December 31, 2011, a total of approximately 1,600 employees were asked to resign due to the closure and partial closure of the Thailand facilities. As of December 31, 2011, 1,452 employees had been exited. The Company recorded employee separation charges of approximately $5.7 million related to these terminations. Additionally, the Company recorded other charges of $2.1 million for costs incurred associated with the closure and partial closure of these facilities.

Additionally, the Company recorded $24.8 million of asset impairment charges related to the write-down of property, plant and equipment, due to damages incurred as a result of the recent flooding in Thailand. Additionally, the Company recorded $28.3 million of damaged inventory write-off. The asset impairment charges and inventory write-off were partially offset by the receipt of insurance proceeds of $25.0 million in 2011, combined with a non-cash insurance recovery of $23.9 million, which represents insurance proceeds received in the first quarter of 2012.

The accrued liability associated with employee separation charges as of December 31, 2011 was $0.5 million. The Company expects to incur additional employee separation charges of $1.4 million and a limited amount of exit costs during 2012 associated with this closure.

Aizu Facility Closure

Cumulative charges of $70.0 million, net of adjustments, have been recognized through December 31, 2011, related to the announced closure of the Company's Aizu facility, for cost savings purposes. During the year ended December 31, 2011, a total of 207 employees were notified that their employment with the Company would be terminated due to the closure of the Aizu facilities. As of December 31, 2011, none of these employees had been exited. The Company recorded employee separation charges of approximately $6.5 million related to these terminations. Additionally, the Company recorded other charges of $2.0 million for costs associated with the pension true up.

Additionally, the Company recorded $61.5 million of asset impairment charges associated with the planned Aizu closure by June 2012. The determination to close this facility triggered an impairment test to determine recoverability of the carrying value of the related long-lived assets. The Company's asset group used for the impairment test was the wafer manufacturing facility. The Company estimated future undiscounted cash flows for the period of continued manufacturing activities and the eventual disposition of the assets using price, volume, cost and salvage value assumptions that management considered reasonable in the circumstances. Based on those undiscounted cash flows for the wafer manufacturing plant, an impairment of the plant and associated long-lived assets was indicated. The impairment charge was recorded as the amount by which the carrying values of the respective assets exceeded their estimated fair values. The fair values were estimated by obtaining third-party valuation estimates, which are unobservable inputs. The Aizu, Japan wafer manufacturing facility mainly supports the Automotive and Power Products Group and the Computing and Consumer Products Group.

The remaining accrued liability associated with employee separation charges as of December 31, 2011 was $6.5 million. The Company expects to incur additional employee separation charges of $9.4 million and $3.0 million of exit costs during 2012 associated with this closure.

2011 Acquisition of SANYO Semiconductor

Cumulative charges of $10.0 million, net of adjustments, have been recognized through December 31, 2011, related to the 2011 announced plans to integrate and restructure the overlapping operations of SANYO Semiconductor and the Company, in part, for cost savings purposes (see Note 4: "Acquisitions" for further discussion regarding the Company's acquisition of SANYO Semiconductor). As part of these plans, SANYO Semiconductor's assembly and test facility is being consolidated into other existing factories. During the year ended December 31, 2011, a total of 289 employees were terminated and the Company recorded employee separation charges of approximately $8.5 million related to these terminations.

During the year ended December 31, 2011, the Company recorded exit costs of approximately $1.5 million related to termination of certain leases, purchase agreements, and items relating to the consolidation of factories.

While the Company has the intention of consolidating the front end manufacturing processes of SANYO Semiconductor with those of the Company over the next 12 months, the anticipated consolidation and associated costs are still being evaluated. In connection with the consolidation, it is likely that the Company will incur significant expenses to complete these activities.

Japan Earthquake and Tsunami

During the year ended December 31, 2011, the Company recorded $4.8 million of other costs associated with damaged inventory and other assets due to the Japanese earthquake and resulting tsunami.

2011 Global Workforce Reduction

Cumulative charges of $2.5 million, net of adjustments, have been recognized through December 31, 2011 related to the announced plans to reduce worldwide personnel for cost savings purposes. A total of 42 employees were notified that their employment with the Company would be terminated due to their positions being eliminated or consolidated in connection with this restructuring. As of the end of the fourth quarter of 2011, 7 of these employees still remained employed by the Company. During the year ended December 31, 2011, the Company recorded employee separation charges of $2.5 million related to these terminations. As of December 31, 2011, the Company had $1.6 million accrued for employee separation charges associated with this activity. We expect that all of these notified individuals will be officially separated and exited from the Company during the fourth quarter of 2012, with all related benefit payments being made in the same period.

IPRD Project Write-Off

Additionally, during the year ended December 31 2011, the Company recorded $0.5 million of other costs associated with the impairment of one project associated with our SDT acquisition, which was determined to be no longer viable.

2011 Closure of the Phoenix, Arizona Wafer Manufacturing Facility

Cumulative charges of $4.3 million, net of adjustments, have been recognized through December 31, 2011, related to the 2011 closure of the Phoenix, Arizona wafer manufacturing facility.

In the second quarter of 2011, the Company proceeded with its previously announced plans to close the Phoenix, Arizona wafer manufacturing facility for cost saving purposes. During the year ended December 31, 2011, a total of 166 employees were notified that their employment with the Company would be terminated due to their positions being eliminated or consolidated in connection with this restructuring. We expect that all remaining employees will be exited by the end of the first quarter of 2012, with all related benefit payments being made in the same period. The Company recorded employee separation charges of approximately $2.7 million related to these terminations. As of December 31, 2011, the Company had $0.2 million accrued for employee separation charges associated with this activity.

Additionally, during the year ended December 31, 2011, the Company recorded exit costs of approximately $1.6 million, related to the decommissioning of the Phoenix, Arizona wafer manufacturing facility. As of December 31, 2011, the Company had $0.3 million accrued for exit costs associated with this activity.

2010 Acquisition of CMD

Cumulative charges of $3.6 million, net of adjustments, have been recognized through December 31, 2011, related to the January 2010 announced plans to integrate and restructure the overlapping operations of the CMD business and the Company, in part for cost savings purposes.

Cumulative employee separation charges of $3.5 million, net of adjustments, have been recognized through December 31, 2011. A total of 27 employees, including five former executive officers of CMD, were notified during 2010 that their positions were being eliminated or consolidated. As of December 31, 2011, all terminations and related termination benefit payments associated with these plans were completed.

Cumulative exit costs of $0.1 million have been recognized from the inception of this restructuring activity through December 31, 2011, related to charges incurred to terminate certain lease agreements. All payments related to these exit activities were completed in the fourth quarter of fiscal 2011.

2009 Global Workforce Reduction

Cumulative employee separation charges of $13.0 million, net of adjustments, have been recognized through December 31, 2011, related to the first quarter of 2009 announced plans to reduce worldwide personnel for cost savings purposes. A total of 570 employees were notified during 2009 that their positions were being eliminated or consolidated, all of which were terminated as of December 31, 2010. All terminations associated with this plan were completed by the end of the fourth quarter of 2010, and all related termination benefits were paid out by the end of the first quarter of 2011.

Acquisition of AMIS Holdings, Inc. ("AMIS")

On March 17, 2008, the Company completed the purchase of AMIS, whereby AMIS became a wholly-owned subsidiary of the Company.

The Company had $10.0 million of accrued liabilities for estimated costs to exit certain activities of AMIS, of which $0.2 million were for employee separation costs and $9.8 million were for exit costs outstanding as of December 31, 2010. During the year ended December 31, 2011, the Company paid decommissioning costs resulting from the shutdown of a fabrication facility of $0.5 million and recorded an adjustment of $1.5 million associated with outstanding exit costs for a lease liability. As of December 31, 2011, the Company had $8.1 million of accrued exit costs associated with this activity. All payments related to these activities are expected to be completed by the end of the first quarter of fiscal 2012.

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Balance Sheet Information

12 Months Ended

Dec. 31, 2011

Balance Sheet Information [Abstract]

Balance Sheet Information

Note 7: Balance Sheet Information


	December 31, 2011			December 31, 2010
Receivables, net:
Accounts receivable	$	464.3		$	301.9
Less: Allowance for doubtful accounts		(7.1	)		(7.3	)

	$	457.2		$	294.6

Inventories:
Raw materials	$	58.8		$	49.0
Work in process		430.8			210.9
Finished goods		147.8			100.9

	$	637.4		$	360.8

Other Current Assets:
Deposits	$	1.9		$	1.9
Prepaid Expenses		26.9			22.2
Tax Receivables		41.0			14.9
Other		51.8			24.6

	$	121.6		$	63.6

Property, plant and equipment, net:
Land	$	76.6		$	48.3
Buildings		539.3			484.4
Machinery and equipment		1,943.0			1,631.1

Total property, plant and equipment		2,558.9			2,163.8
Less: Accumulated depreciation		(1,449.4	)		(1,299.5	)

	$	1,109.5		$	864.3

Accrued expenses:
Accrued payroll	$	125.2		$	73.1
Sales related reserves		45.5			36.5
Restructuring reserves		17.3			11.3
Accrued pension liability		11.4			0.3
Other		40.4			41.4

	$	239.8		$	162.6

Accumulated other comprehensive loss:
Foreign currency translation adjustments	$	(46.5	)	$	(58.8	)
Unrecognized prior service cost of defined benefit pension plan		(0.2	)		(0.1	)
Prior service cost from pension legal plan amendment		—			(0.2	)

	$	(46.7	)	$	(59.1	)

Depreciation expense for property, plant and equipment, including amortization of capital leases, totaled $162.8 million, $115.1 million and $108.3 million for 2011, 2010 and 2009, respectively.

The property, plant and equipment amounts above as of December 31, 2011 are inclusive of asset impairments of $86.3 million. See Note 6: "Restructuring, Asset Impairments and Other, Net" for further details.

As of December 31, 2011 and 2010, total property, plant and equipment included $89.5 million and $104.0 million, respectively, of assets financed under capital leases. Accumulated depreciation associated with these assets is included in total accumulated depreciation in the table above.

Included in accumulated other comprehensive loss is $18.5 million of foreign currency translation gains related to our Aizu, Japan facility. As further described in Note 6: "Restructuring, Asset Impairments and Other, Net", the Company intends to close its Aizu, Japan facility during 2012. After the operational closure is complete, the Company will proceed to liquidate and wind-down the legal entity. As required by accounting standards, when the liquidation is substantially complete, the Company will recognize in results of operations any amount remaining in accumulated other comprehensive income related to the entity.

The activity related to our warranty reserves for 2009, 2010 and 2011 follows (in millions):


Balance as of December 31, 2008	$	3.9
Provision		0.4
Usage		(1.1	)

Balance as of December 31, 2009		3.2
Provision		0.9
Usage		(0.8	)

Balance as of December 31, 2010		3.3
Provision		4.0
Usage		(1.5	)

Balance as of December 31, 2011	$	5.8

Long-Term Debt

12 Months Ended

Dec. 31, 2011

Long-Term Debt [Abstract]

Long-Term Debt

Note 8: Long-Term Debt

Long-term debt consists of the following (dollars in millions):


	December 31, 2011			December 31, 2010
Senior Revolving Credit Facility (up to $325.0 million)	$	—		$	—
Loan with a Japanese company due 2012 through 2018, interest payable quarterly at 2.33%		339.8			—
Zero Coupon Convertible Senior Subordinated Notes due 2024 (net of discount of $2.0 million and $8.7 million, respectively) (1)		94.2			87.5
1.875% Convertible Senior Subordinated Notes due 2025 (net of discount of $6.6 million and $12.8 million, respectively) (2)		88.4			82.2
2.625% Convertible Senior Subordinated Notes due 2026 (net of discount of $24.5 million and $73.9 million, respectively) (3)		207.9			410.1
2.625% Convertible Senior Subordinated Notes due 2026, Series B (net of discount of $22.0 million) (4)		176.6			—
Loan with Hong Kong bank, interest payable weekly at 2.04% and 2.03%, respectively		40.0			40.0
Loans with Philippine banks due 2012 through 2015, interest payable monthly and quarterly at an average rate of 2.01% and 1.80%, respectively		68.2			68.8
Loans with Chinese banks due 2013, interest payable quarterly at an average rate of 4.44% and 4.23%, respectively		7.0			34.0
Loans with Japanese banks due through 2013, interest payable monthly and semi-annually at an average rate of 1.71% and 1.45%, respectively		3.5			3.9
Loan with Singapore bank, interest payable weekly at 1.97%		25.0			—
Loan with British finance company, interest payable monthly at 2.42% and 2.18%, respectively		13.1			13.8
U.S. real estate mortgages payable monthly through 2016 at an average rate of 4.86%		31.6			33.0
U.S. equipment financing payable monthly through 2015 at 3.23%		10.8			—
Capital lease obligations		100.9			115.5

Long-term debt, including current maturities		1,207.0			888.8
Less: Current maturities		(370.1	)		(136.0	)

Long-term debt	$	836.9		$	752.8

(1)	The Zero Coupon Convertible Senior Subordinated Notes due 2024 may be put back to the Company at the option of the holders of the notes on April 15 of 2012, 2014 and 2019 or called at the option of the Company on or after April 15, 2012.

(2)	The 1.875% Convertible Senior Subordinated Notes due 2025 may be put back to the Company at the option of the holders of the notes on December 15 of 2012, 2015 and 2020 or called at the option of the Company on or after December 20, 2012.

(3)	The 2.625% Convertible Senior Subordinated Notes due 2026 may be put back to the Company at the option of the holders of the notes on December 15 of 2013, 2016 and 2021 or called at the option of the Company on or after December 20, 2013.

(4)	The 2.625% Convertible Senior Subordinated Notes due 2026, Series B may be put back to the Company at the option of the holders of the notes on December 15 of 2016 and 2021 or called at the option of the Company on or after December 20, 2016.

Annual maturities relating to the Company's long-term debt as of December 31, 2011 are as follows (in millions):


	Actual Maturities
2012		378.8
2013		329.4
2014		75.2
2015		63.4
2016		237.4
Thereafter		178.0

Total	$	1,262.2

The above table reflects principal payments of $622.2 million relating to the Zero Coupon Convertible Senior Subordinated Notes due 2024, the 1.875% Convertible Senior Subordinated Notes due 2025, the 2.625% Convertible Senior Subordinated Notes due 2026 and the 2.625% Convertible Senior Subordinated Notes due 2026, Series B.

Loss on Debt Repurchase and Exchange

During the year ended December 31, 2011, the Company exchanged $198.6 million in par value ($177.2 million of carrying value) of its 2.625% Convertible Senior Subordinated Notes due 2026 for $198.6 million in par value ($176.4 million of carrying value) of 2.625% Convertible Senior Subordinated Notes due 2026, Series B and $15.9 million in cash. The cash payment and the $198.6 million of 2.625% Convertible Senior Subordinated Notes due 2026, Series B were allocated between the fair value of the liability component and the equity component of the convertible security. The amount allocated to the extinguishment of the liability component was based on the discounted cash flows using a rate of return an investor would have required on non-convertible debt with other terms substantially similar to the 2.625% Convertible Senior Subordinated Notes due 2026. The remaining consideration was recognized as reacquisition of the equity component.

The difference between the consideration allocated to the liability component and the rest of the net carrying amount of the liability and unamortized debt issuance costs was recorded as a loss on debt repurchase of $17.9 million, which included the write-off of $1.7 million in unamortized debt issuance costs. The Company also recorded an adjustment to additional paid-in capital in the amount of $21.0 million for the reacqusiton of equity component.

During the year ended December 31, 2011, the Company also repurchased $53.0 million in par value ($46.6 million of carrying value) of its 2.625% Convertible Senior Subordinated Notes due 2026 for $56.2 million in cash. The cash payment was allocated between the fair value of the liability component and the equity component of the convertible security. The amount allocated to the extinguishment of the liability component was based on the discounted cash flows using a rate of return an investor would have required on non-convertible debt with other terms substantially similar to the 2.625% Convertible Senior Subordinated Notes due 2026. The remaining consideration was recognized as reacquisition of the equity component.

The difference between the consideration allocated to the liability component and the rest of the net carrying amount of the liability and unamortized debt issuance costs was recorded as a loss on debt repurchase of $5.3 million, which included the write-off of $0.5 million in unamortized debt issuance costs. The Company also recorded an adjustment to additional paid-in capital in the amount of $4.8 million for the reacquistion of equity component.

During the year ended December 31, 2010, the Company incurred a loss on debt repurchase of $0.8 million as a result of the write-off of unamortized debt issuance costs, related to the $169.8 million prepayment of the senior bank facilities and a $0.1 million gain as a result of the modification of the Zero Coupon Convertible Senior Subordinated Notes due 2024.

During the year ended December 31, 2009, the Company incurred a net loss on debt repurchase of $3.1 million, which included the write-off of $0.7 million in unamortized debt issuance costs, resulting from the repurchase of $99.7 million in par value ($91.0 million of carrying value) of its Zero Coupon Convertible Senior Subordinated Notes due 2024 for $64.8 million in cash and the issuance of 7.4 million shares of common stock, which had a value of $28.5 million based on the closing price of the Company's common stock at the time of repurchase.

Acquisition Note Payable to SANYO Electric

In January 2011, SCI LLC, as borrower, and the Company, as guarantor, entered into a seven-year, unsecured loan agreement with SANYO Electric to finance a portion of the purchase price of the SANYO Semiconductor acquisition. The loan had an original principal amount of approximately $377.5 million and had a principal balance of $339.8 million as of December 31, 2011. The loan bears interest at a rate of 3-month LIBOR plus 1.75% per annum and provides for quarterly interest and $9.4 million in principal payments, with the unpaid balance of $122.7 million due in January 2018.

Senior Revolving Credit Facility

On December 23, 2011, the Company and its wholly owned subsidiary, SCI LLC, entered into a $325.0 million, five-year senior revolving credit facility (the "Facility"), the terms of which are set forth in a Credit Agreement dated as of December 23, 2011 ("Credit Agreement") between the Company and a group of lenders. The new Facility includes $40.0 million availability for the issuance of letters of credit, $15.0 million availability for swingline loans for short-term borrowings and a foreign currency sublimit of $75.0 million. SCI LLC has the ability to increase the size of the Facility from time-to-time in increments of $10.0 million so long as after giving effect to such increases, the aggregate amount of all such increases does not exceed $125.0 million.

Payments of the principal amounts of revolving loans under the Credit Agreement are due no later than December 23, 2016, which is the maturity date of the Facility. Interest is payable based on either a LIBOR or base rate option, plus an applicable rate that varies based on the total leverage ratio. SCI LLC has also agreed to pay the lenders certain fees, including a commitment fee that varies based on the total leverage ratio. SCI LLC may prepay loans under the Credit Agreement at any time, in whole or in part, upon payment of accrued interest and break funding payments, if applicable.

The obligations under the Facility are guaranteed by certain of the domestic subsidiaries of the Company and SCI LLC and are secured by a pledge of the equity interests in certain of the Company and SCI LLC's domestic subsidiaries. The Company and SCI LLC are also required to pledge certain of their equity interests in certain material first tier foreign subsidiaries within a specified time after closing.

The Credit Agreement contains affirmative and negative covenants that are customary for credit agreements of this nature. The negative covenants include, among other things, limitations on asset sales, mergers and acquisitions, indebtedness, liens, investments and transactions with affiliates. The Credit Agreement contains only two financial covenants: (i) a maximum total leverage ratio of consolidated total indebtedness to consolidated earnings before interest, taxes, depreciation and amortization ("consolidated EBITDA") for the trailing four consecutive quarters of 3.75 to 1.00; and (ii) a minimum interest coverage ratio of consolidated EBITDA to consolidated interest expense for the trailing four consecutive quarters of 3.50 to 1.0.

The Credit Agreement includes customary events of default that include, among other things, non-payment defaults, inaccuracy of representations and warranties, covenant defaults, cross default to material indebtedness, bankruptcy and insolvency defaults, material judgment defaults, ERISA defaults and a change of control default. The occurrence of an event of default could result in the acceleration of the obligations under the Credit Agreement. The Company was in compliance with the various covenants contained in the Credit Agreement as of December 31, 2011 and expects to remain in compliance with all covenants over the next twelve months.

The Company can utilize the borrowings under the Facility for areas such as general corporate purposes, working capital and acquisitions. To date, the Company has not borrowed under the Facility. Included in other assets as of December 31, 2011, were $2.3 million of debt issuance costs associated with the senior revolving credit facility.

Zero Coupon Convertible Senior Subordinated Notes

On April 6, 2004, the Company commenced a cash tender offer for all of its then outstanding 12% senior subordinated notes due 2009. In order to finance the cash tender offer, the Company issued $260.0 million of Zero Coupon Convertible Senior Subordinated Notes due 2024. The Company received net proceeds of approximately $251.2 million from the sale of the notes after deducting commissions and estimated offering expenses of $8.8 million, which were capitalized as debt issuance costs and were being amortized using the effective interest method through the first put date of April 15, 2010. The notes do not bear cash interest, nor does the principal amount accrete. The effective interest rate of the notes is 8.9%. The notes are fully and unconditionally guaranteed on an unsecured senior subordinated basis by certain existing domestic subsidiaries of the Company.

In June 2006, the Company commenced an offer to exchange all of its then outstanding $260.0 million principal amount of Zero Coupon Convertible Senior Subordinated Notes due 2024 (the "Old Notes") for a like principal amount of new Zero Coupon Convertible Senior Subordinated Notes due 2024 (the "New Notes"), plus an exchange fee of $2.50 per $1,000 principal amount of the Old Notes validly tendered and accepted for exchange. The New Notes contain a net share settlement feature, which reduces the amount of shares included in diluted net income per share. On July 21, 2006, the Company issued $259.5 million aggregate principal at par of New Notes that are convertible into cash up to the par value at a conversion rate of 101.8849 shares per $1,000 principal amount under certain circumstances. The excess of fair value over par value is convertible into stock. The exchange expired on July 19, 2006, and 99.8% of the aggregate principal amount of the Old Notes were tendered and subsequently exchanged. On August 9, 2006, the Company entered into transactions with four of the remaining holders of the Old Notes and exchanged $443,000 aggregate principal at par of Old Notes that were not tendered in the exchange. These holders exchanged their Old Notes for New Notes on the same terms as the exchange offer discussed above. The Company intends to repurchase or redeem all of the Old Notes that remain outstanding, subject to market conditions.

In the fourth quarter of 2008, the Company repurchased $60.9 million of par value of Zero Coupon Convertible Senior Subordinated Notes due 2024 for $49.4 million. Additionally, the Company wrote off the proportionate share of debt issuance costs of $0.5 million, thus recognizing a net $3.8 million gain on the extinguishment of the debt.

In the first half of 2009, the Company repurchased $99.7 million of par value of Zero Coupon Convertible Senior Subordinated Notes due 2024 for $64.8 million in cash and the issuance of 7.4 million shares of common stock, which had a value of $28.5 million based on the closing price of the Company's common stock at the time of repurchase. The Company recognized a $3.1 million loss on the repurchase, which included the write-off of $0.7 million in unamortized debt issuance costs.

The New Notes are convertible by holders into cash and shares of the Company's common stock at a conversion rate of 101.8849 shares of common stock per $1,000 principal amount of notes (subject to adjustment in certain events), which is equivalent to an initial conversion price of approximately $9.815 per share of common stock. The Company will settle conversion of all notes validly tendered for conversion in cash and shares of the Company's common stock, if applicable, subject to the Company's right to pay the share amount in additional cash. Holders may convert their notes under the following circumstances: (i) during the five business-day period immediately following any five consecutive trading-day period in which the trading price per $1,000 principal amount of notes for each day of such period was less than 98% of the product of the closing sale price of the Company's common stock and the conversion rate; (ii) upon occurrence of the specified transactions described in the indenture relating to the notes; or (iii) after April 15, 2010. The Company determined that the conversion option based on a trading price condition meets the definition of a derivative, and should be bifurcated from the debt host and accounted for separately. However, the fair value of this feature was determined to be de minimis at the date of issuance and the Company continues to evaluate the significance of this feature on a quarterly basis.

In April 2010, the Company amended the Indenture for its Zero Coupon Convertible Senior Subordinated Notes due 2024. The amendments include one additional opportunity to require the Company to purchase the notes on April 15, 2012; and eliminates the Company's ability to redeem the notes at its option from April 15, 2010 until April 15, 2012. Additionally the holders may require the Company to repurchase the notes for cash on April 15, 2014 and 2019.

In accordance with the right of the holders of the notes to require the Company to purchase the notes on April 15, 2010, approximately $3.2 million of the $99.4 million par value of notes then outstanding were purchased by the Company. The amendment was considered a substantial modification for accounting purposes; therefore the $96.2 million original remaining debt was deemed to be extinguished, resulting in a $0.1 million gain, and a new convertible debt with fair value of $98.5 million was deemed to be issued.

The Company is required to separately account for the liability and equity components of convertible debt instruments with cash settlement features. Thus, the liability component of the new convertible debt was recognized at the present value of its cash flows discounted using a discount rate equivalent to the borrowing rate at the date of the modification of the convertible notes for similar debt instruments without a conversion feature. The equity component of the new convertible debt was recorded as additional paid in capital and represents the difference between the fair value of the modified convertible notes and the liability component. It also requires an accretion of the debt discount resulting from the allocation of a portion of the modified fair value to equity over the life of the notes, which is expected to be the next put date of April 15, 2012.

As a result, the Company recognized $13.3 million of debt discount, which will be amortized through April 2012.

The notes, which are the Company's unsecured obligations, will be subordinated in right of payment to all of the Company's existing and future senior indebtedness, will rank pari passu in right of payment with all of the Company's existing and future senior subordinated indebtedness and will be senior in right of payment to all of the Company's existing and future subordinated obligations. The notes will also be effectively subordinated to any of the Company's or its subsidiaries' secured indebtedness to the extent of the value of the assets securing such indebtedness.

Included in long-term debt as of December 31, 2011 was $2.0 million of unamortized debt discount associated with the Zero Coupon Convertible Senior Subordinated Notes due 2024, which will be amortized using the effective interest method through 2012.

1.875% Convertible Senior Subordinated Notes

In order to finance the repayment of the previously outstanding junior subordinated note, on December 21, 2005, the Company issued $95.0 million of 1.875% Convertible Senior Subordinated Notes due 2025. The Company received net proceeds of approximately $91.0 million from the sale of the notes after deducting commissions and estimated offering expenses of $4.0 million, which were capitalized as debt issuance costs and are being amortized using the effective interest method through the first put date of December 15, 2012. The notes bear interest at the rate of 1.875% per year from the date of issuance. Interest on the notes is payable on June 15 and December 15 of each year, beginning on June 15, 2006. The effective interest rate of the notes is 9.5%. The notes are fully and unconditionally guaranteed on an unsecured senior subordinated basis by certain existing domestic subsidiaries of the Company.

The notes are convertible by holders into cash and shares of the Company's common stock at a conversion rate of 142.8571 shares of common stock per $1,000 principal amount of notes (subject to adjustment in certain events), which is equivalent to an initial conversion price of approximately $7.00 per share of common stock. The Company will settle conversion of all notes validly tendered for conversion in cash and shares of the Company's common stock, if applicable, subject to the Company's right to pay the share amount in additional cash. Holders may convert their notes under the following circumstances: (i) during the five business-day period immediately following any five consecutive trading-day period in which the trading price per $1,000 principal amount of notes for each day of such period was less than 103% of the product of the closing sale price of the Company's common stock and the conversion rate; (ii) upon occurrence of the specified transactions described in the indenture relating to the notes; or (iii) after June 15, 2012. The Company determined that the conversion option based on a trading price condition meets the definition of a derivative, and should be bifurcated from the debt host and accounted for separately. However, the fair value of this feature was determined to be de minimis at the date of issuance and the Company continues to evaluate the significance of this feature on a quarterly basis.

The notes will mature on December 15, 2025. Beginning December 20, 2012, the Company may redeem the notes, in whole or in part, for cash at a price of 100% of the principal amount plus accrued and unpaid interest to, but excluding, the redemption date. If a holder elects to convert its notes in connection with the occurrence of specified fundamental changes that occur prior to December 15, 2012, the holder will be entitled to receive, in addition to cash and shares of common stock equal to the conversion rate, an additional number of shares of common stock, in each case as described in the indenture. Notwithstanding these conversion rate adjustments, these notes contain an explicit limit on the number of shares issuable upon conversion. Holders may require the Company to repurchase the notes for cash on December 15 of 2012, 2015 and 2020 at a repurchase price equal to 100% of the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date. Upon the occurrence of certain corporate events, each holder may require the Company to purchase all or a portion of such holder's notes for cash at a price equal to the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date.

The notes which are the Company's unsecured obligations, will be subordinated in right of payment to all of the Company's existing and future senior indebtedness, will rank pari passu in right of payment with all of the Company's existing and future senior subordinated indebtedness and will be senior in right of payment to all of the Company's existing and future subordinated obligations. The notes will also be effectively subordinated to any of the Company's or its subsidiaries' secured indebtedness to the extent of the value of the assets securing such indebtedness.

Included in other assets as of December 31, 2011, were $0.5 million of debt issuance costs associated with the 1.875% Convertible Senior Subordinated Notes due 2025, which will be amortized using the effective interest method through 2012. Included in long-term debt as of December 31, 2011 was $6.6 million of unamortized debt discount associated with the 1.875% Convertible Senior Subordinated Notes due 2025, which will be amortized using the effective interest method through 2012.

2.625% Convertible Senior Subordinated Notes

On December 15, 2006, the Company issued $484.0 million of 2.625% Convertible Senior Subordinated Notes due 2026. The Company received net proceeds of approximately $471.7 million from the sale of the notes after deducting commissions and estimated offering expenses of $13.3 million, which were capitalized as debt issuance costs and are being amortized using the effective interest method through the first put date of December 15, 2013. The Company used the net proceeds to repay $199.1 million outstanding principal of its senior bank facilities and to repurchase 30.7 million shares of its common stock outstanding for $230.0 million and the remainder for general corporate purposes. The notes bear interest at the rate of 2.625% per year from the date of issuance. Interest on the notes is payable on June 15 and December 15 of each year, beginning on June 15, 2007. The effective interest rate of the notes is 8.5%. The notes are fully and unconditionally guaranteed on an unsecured senior subordinated basis by certain existing domestic subsidiaries of the Company.

The notes are convertible by holders into cash and shares of the Company's common stock at a conversion rate of 95.2381 shares of common stock per $1,000 principal amount of notes (subject to adjustment in certain events), which is equivalent to an initial conversion price of approximately $10.50 per share of common stock. The Company will settle conversion of all notes validly tendered for conversion in cash and shares of the Company's common stock, if applicable, subject to the Company's right to pay the share amount in additional cash. Holders may convert their notes under the following circumstances: (i) during the five business-day period immediately following any five consecutive trading-day period in which the trading price per $1,000 principal amount of notes for each day of such period was less than 103% of the product of the closing sale price of the Company's common stock and the conversion rate; (ii) upon occurrence of the specified transactions described in the indenture relating to the notes; or (iii) after June 15, 2013. The Company determined that the conversion option based on a trading price condition meets the definition of a derivative, and should be bifurcated from the debt host and accounted for separately. However, the fair value of this feature was determined to be de minimis at the date of issuance and the Company continues to evaluate the significance of this feature on a quarterly basis.

In the third quarter of 2011, the Company repurchased $53.0 million of par value ($46.6 million of carrying value) of its 2.625% Convertible Senior Subordinated Notes due 2026 for $56.2 million in cash. Additionally, the Company wrote off the proportionate share of debt issuance costs of $0.5 million, thus recognizing a net $5.3 million loss on the extinguishment of the debt.

The notes will mature on December 15, 2026. Beginning December 20, 2013, the Company may redeem the notes, in whole or in part, for cash at a price of 100% of the principal amount plus accrued and unpaid interest to, but excluding, the redemption date. If a holder elects to convert its notes in connection with the occurrence of specified fundamental changes that occur prior to December 15, 2013, the holder will be entitled to receive, in addition to cash and shares of common stock equal to the conversion rate, an additional number of shares of common stock, in each case as described in the indenture. Notwithstanding these conversion rate adjustments, these notes contain an explicit limit on the number of shares issuable upon conversion. Holders may require the Company to repurchase the notes for cash on December 15 of 2013, 2016 and 2021 at a repurchase price equal to 100% of the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date. Upon the occurrence of certain corporate events, each holder may require the Company to purchase all or a portion of such holder's notes for cash at a price equal to the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date.

Included in other assets as of December 31, 2011, were $1.9 million of debt issuance costs associated with the 2.625% Convertible Senior Subordinated Notes due 2026, which will be amortized using the effective interest method through 2013. Included in long-term debt as of December 31, 2011 was $24.5 million of unamortized debt discount associated with the 2.625% Convertible Senior Subordinated Notes due 2026, which will be amortized using the effective interest method through 2013.

2.625% Convertible Senior Subordinated Notes, Series B

On December 15, 2011, the Company exchanged $198.6 million of its 2.625% Convertible Senior Subordinated Notes due 2026 for $198.6 million of 2.625% Convertible Senior Subordinated Notes due 2026, Series B. The Company recorded exchange expenses of $1.4 million, which were capitalized as debt issuance costs and are being amortized using the effective interest method through the first put date of December 15, 2016. The notes bear interest at the rate of 2.625% per year from the date of issuance. Interest on the notes is payable on June 15 and December 15 of each year, beginning on June 15, 2012. The effective interest rate of the notes is 5.25%. The notes are fully and unconditionally guaranteed on an unsecured senior subordinated basis by certain existing domestic subsidiaries of the Company.

The notes are convertible by holders into cash and shares of the Company's common stock at a conversion rate of 95.2381 shares of common stock per $1,000 principal amount of notes (subject to adjustment in certain events), which is equivalent to an initial conversion price of approximately $10.50 per share of common stock. The Company will settle conversion of all notes validly tendered for conversion in cash and shares of the Company's common stock, if applicable, subject to the Company's right to pay the share amount in additional cash. Holders may convert their notes under the following circumstances: (i) during the five business-day period immediately following any five consecutive trading-day period in which the trading price per $1,000 principal amount of notes for each day of such period was less than 103% of the product of the closing sale price of the Company's common stock and the conversion rate; (ii) upon occurrence of the specified transactions described in the indenture relating to the notes; or (iii) on and after June 15, 2016. The Company determined that the conversion option based on a trading price condition meets the definition of a derivative, and should be bifurcated from the debt host and accounted for separately. However, the fair value of this feature was determined to be de minimis at the date of issuance and the Company continues to evaluate the significance of this feature on a quarterly basis.

The notes will mature on December 15, 2026. Beginning December 20, 2016, the Company may redeem the notes, in whole or in part, for cash at a price of 100% of the principal amount plus accrued and unpaid interest to, but excluding, the redemption date. If a holder elects to convert its notes in connection with the occurrence of specified fundamental changes that occur prior to December 15, 2016, the holder will be entitled to receive, in addition to cash and shares of common stock equal to the conversion rate, an additional number of shares of common stock, in each case as described in the indenture. Notwithstanding these conversion rate adjustments, these notes contain an explicit limit on the number of shares issuable upon conversion. Holders may require the Company to repurchase the notes for cash on December 15 of 2016 and 2021 at a repurchase price equal to 100% of the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date. Upon the occurrence of certain specified events, each holder may require the Company to purchase all or a portion of such holder's notes for cash at a price equal to the principal amount of such notes, plus accrued and unpaid interest, to, but excluding, the repurchase date.

Included in other assets as of December 31, 2011, were $1.4 million of debt issuance costs associated with the 2.625% Convertible Senior Subordinated Notes due 2026, Series B, which will be amortized using the effective interest method through 2016. Included in long-term debt as of December 31, 2011 was $22.0 million of unamortized debt discount associated with the 2.625% Convertible Senior Subordinated Notes due 2026, Series B, which will be amortized using the effective interest method through 2016.

The Company's foreign and domestic subsidiaries entered into various debt arrangements as follows (dollars in millions):


Loan Agreement	Balance as of December 31, 2011		Secured By
U.S. Equipment Financing	$	10.8		Equipment
Philippines Loan		10.0		Unsecured
Philippines Loans		58.2		Equipment
Singapore Loan		25.0		Accounts Receivable
Chinese Loan		7.0		Unsecured
Japanese loans		3.5		Unsecured
U.S. Real Estate Mortgages		31.6		Real Estate
Loan with British Finance Company		13.1		Accounts Receivable
Loan with Hong Kong Bank		40.0		Accounts Receivable

Capital Lease Obligations

The Company has various capital lease obligations primarily for machinery and equipment, which as of December 31, 2011 totaled $100.9 million, with interest rates ranging from 1.9% to 15.5% and maturities from the first quarter of 2012 until the first quarter of 2020.

During 2010, the Company sold assets with a net book value of $25.2 million for $37.1 million to a leasing agency under a sale-leaseback arrangement. We deferred a gain on the transaction in the amount of $11.9 million. Concurrently, the Company purchased the assets under a capital lease agreement with the net present value of minimum lease payments of $37.1 million, which will be depreciated over the lease term of four years.

Debt Guarantees

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Income Taxes

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Income Taxes

Note 9: Income Taxes

Geographic sources of income (loss) before income taxes and minority interests are as follows (in millions):


	Year ended December 31,
	2011			2010			2009
United States	$	(143.9	)	$	(57.5	)	$	(28.3	)
Foreign		181.7			363.2			99.3

	$	37.8		$	305.7		$	71.0

The provision (benefit) for income taxes is as follows (in millions):


	Year ended December 31,
	2011			2010			2009
Current:
Federal	$	0.5		$	(0.3	)	$	(1.8	)
State and local		0.3			0.4			0.2
Foreign		25.0			8.4			7.8

		25.8			8.5			6.2

Deferred:
Federal		—			(1.2	)		1.2
Foreign		(2.9	)		5.5			0.3

		(2.9	)		4.3			1.5

	$	22.9		$	12.8		$	7.7

A reconciliation of the U.S. federal statutory income tax rate to the Company's effective income tax rate is as follow:


	Year ended December 31,
	2011			2010			2009
U.S. federal statutory rate		35.0	%		35.0	%		35.0	%
Increase (decrease) resulting from:
State and local taxes, net of federal tax benefit		0.7			0.1			0.4
Foreign withholding taxes		0.1			—			3.3
Foreign rate differential		(588.0	)		(36.5	)		(39.6	)
Dividend income from foreign subsidiaries		146.1			15.3			89.1
Goodwill impairment		—			—			—
Gain on SANYO Semiconductor acquisition		(22.5	)		—			—
Research and development credit monetization		—			(0.1	)		(2.8	)
Change in valuation allowance		491.5			(8.0	)		(72.0	)
Tax reserves		0.8			(0.3	)		(7.5	)
Other		(3.1	)		(1.3	)		4.9

		60.6	%		4.2	%		10.8	%

The tax effects of temporary differences in the recognition of income and expense for tax and financial reporting purposes that give rise to significant portions of the deferred tax assets, net of deferred tax liabilities as of December 31, 2011 and December 31, 2010, are as follows (in millions):


	Year ended December 31,
	2011			2010
Net operating loss and tax credit carryforwards	$	1,056.5		$	424.1
Tax-deductible goodwill		40.6			65.3
Reserves and accruals		31.7			67.2
Property, plant and equipment		360.5			7.4
Inventories		101.3			14.0
Other		28.6			(19.7	)

Deferred tax assets and liabilities before valuation allowance	$	1,619.2		$	558.3

Valuation allowance		(1,626.1	)		(560.8	)

Net deferred tax asset (liability)	$	(6.9	)	$	(2.5	)

A valuation allowance has been recorded against the Company's deferred tax assets, with the exception of deferred tax assets at certain foreign subsidiaries, as management cannot conclude that it is more likely than not that these assets will be realized. As of December 31, 2011, the Company had $14.9 million of valuation allowance related to stock option deductions, which, if realized, will be accounted for as an addition to equity rather than as a reduction to the provision for income taxes.

As of December 31, 2011, the Company's federal, state, and foreign net operating loss carryforwards ("NOLs") were $874.8 million, $932.6 million and $1,529.3 million, respectively. If not utilized, these NOLs will expire in varying amounts from 2012 through 2028. Pursuant to Sections 382 and 383 of the Internal Revenue Code, the utilization of NOLs and other tax attributes may be subject to substantial limitations if certain ownership changes occur during a three-year testing period (as defined by the Internal Revenue Code). During 2006, such an ownership change occurred, limiting the use of federal NOL's to approximately $93.1 million per year.

The Company reviews the collectibility of its tax receivables due from various jurisdictions and when recovery is uncertain, the Company reserves amounts deemed to be uncollectible. If the receipts of these amounts occur or are assured, the reversal of the reserves previously established would result in a tax benefit in the period. As of December 31, 2011, the Company had no allowances for tax receivables.

The 2011 provision of $22.9 million included $19.4 million for income and withholding taxes of certain of our foreign operations, $3.2 million of additional valuation allowance against certain deferred tax assets and $2.9 million of interest on existing reserves for potential liabilities in foreign taxing jurisdictions. This is partially offset by the reversal of $2.6 million for reserves and interest for potential liabilities in foreign taxing jurisdictions which were effectively settled or for which the statute lapsed during 2011.

The 2010 provision included $13.5 million for income and withholding taxes of certain of the Company's foreign operations and $2.7 million of new reserves and interest on existing reserves for potential liabilities in foreign taxing jurisdictions. This was partially offset by the reversal of $3.4 million for reserves and interest for potential liabilities in foreign taxing jurisdiction, which was effectively settled, or for which the statute lapsed during 2010.

The 2009 provision included $13.0 million for income and withholding taxes of certain of the Company's foreign and U.S. operations and $3.4 million of new reserves for potential liabilities in foreign taxing jurisdictions, partially offset by the reversal of $8.7 million of previously accrued income taxes for anticipated audit issues.

Each year, the Company reassesses its intentions regarding repatriation of undistributed earnings from non-U.S. subsidiaries, concluding that except for certain earnings that the Company intends to reinvest indefinitely, provisions will be made for the estimated U.S. federal income taxes applicable to undistributed earnings of non-U.S. subsidiaries on the belief that those earnings will be ultimately dividended to the parent. Undistributed earnings of approximately $1,288.7 million at December 31, 2011 have been indefinitely reinvested; therefore, no provision has been made for taxes due upon remittance of these earnings. Determination of the amount of unrecognized deferred tax liability on these undistributed earnings is not practicable.

The Company or one of its subsidiaries files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2005.

The Company maintains liabilities for uncertain tax positions. These liabilities involve considerable judgment and estimation and are continuously monitored by management based on the best information available, including changes in tax regulations, the outcome of relevant court cases, and other information. The Company is currently under examination by various taxing authorities. Although the outcome of any tax audit is uncertain, the Company believes that it has adequately provided in its consolidated financial statements for any additional taxes that the Company may be required to pay as a result of such examinations. If the payment ultimately proves not to be necessary, the reversal of these tax liabilities would result in tax benefits being recognized in the period the Company determines such liabilities are no longer necessary. However, if an ultimate tax assessment exceeds the Company's estimate of tax liabilities, additional tax expense will be recorded. The impact of such adjustments could have a material impact on the Company's results of operations in future periods.

The activity for unrecognized gross tax benefits for 2011, 2010 and 2009 (in millions) is as follows:


	2011			2010			2009
Balance at beginning of year	$	13.4		$	17.0		$	19.4
Reserves acquired		1.3			—			2.7
Additions based on tax positions related to the current year		5.5			1.2			1.4
Additions for tax positions of prior years		0.8			0.5			1.0
Reductions for tax positions of prior years		(1.4	)		(0.3	)		(3.9	)
Lapse of statute		(1.0	)		(5.0	)		(3.6	)
Settlements		—			—			—

Currency adjustments		—			—			—

Balance at end of year	$	18.6		$	13.4		$	17.0

Included in the December 31, 2011 balance of $18.6 million is $17.7 million related to unrecognized tax positions that, if recognized, would affect the annual effective tax rate. Of the total $18.6 million balance of unrecognized tax benefit at December 31, 2011, $1.4 million is related to tax positions for which it is reasonably possible that the total amounts could significantly change during the 12 months following December 31, 2011, as a result of expiring statutes of limitations.

The Company recognizes interest and penalties accrued in relation to unrecognized tax benefits in tax expense. The Company recognized approximately $(0.1) million, $(0.1) million and $(0.8) million in benefits during the years ended December 31, 2011, 2010 and 2009, respectively. Additionally, upon the acquisition of PulseCore, the balance of accrued interest and penalties increased $0.9 million during 2009. The Company had approximately $2.9 million, $2.9 million and $4.0 million of accrued interest and penalties at December 31, 2011, 2010 and 2009, respectively.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Earnings Per Share And Equity

12 Months Ended

Dec. 31, 2011

Earnings Per Share And Equity [Abstract]

Earnings Per Share And Equity

Note 10: Earnings Per Share and Equity

Calculations of net income per common share attributable to ON Semiconductor are as follows (in millions, except per share data):


	For the years ended December 31,
	2011		2010		2009
Net income applicable to ON Semiconductor Corporation	$	11.6	$	290.5	$	61.0

Basic weighted average common shares outstanding		446.7		431.0		420.8
Add: Incremental shares for:
Dilutive effect of stock options and awards		7.6		9.3		8.5
Dilutive effect of convertible notes		2.9		4.1		2.8

Diluted weighted average common shares outstanding		457.2		444.4		432.1

Net income per common share attributable to ON Semiconductor Corporation
Basic:	$	0.03	$	0.67	$	0.14
Basic:	$	0.03	$	0.67	$	0.14

Diluted:	$	0.03	$	0.65	$	0.14

Basic income per common share is computed by dividing net income attributable to ON Semiconductor by the weighted average number of common shares outstanding during the period.

The number of incremental shares from the assumed exercise of stock options and assumed issuance of restricted stock units is calculated by applying the treasury stock method. Common shares relating to the employee stock options where the exercise price exceeded the average market price of the Company's common shares for the period have been anti-dilutive and were excluded from the diluted net income per share calculation. The excluded option shares were 11.7 million, 13.7 million and 13.1 million for the years ended December 31, 2011, 2010 and 2009, respectively.

The incremental shares related to the Company's Zero Coupon Convertible Senior Subordinated Notes due 2024, 2.625% Convertible Senior Subordinated Notes due 2026 (including Series B notes), and the 1.875% Convertible Senior Subordinated Notes due 2025 (collectively, the "Convertible Notes") is determined in accordance with the net share settlement requirements prescribed by ASC Topic 260, Earnings Per Share ("ASC 260"). Under the net share settlement calculation, the Convertible Notes are assumed to be convertible into cash up to the par value, with the excess of par value being convertible into common stock. The dilutive effect occurs when the stock price exceeds the conversion price for each of the Convertible Notes, as of the end of the period or as described in ASC 260 for year-to-date calculations. In periods when the share price is lower than the conversion price, the impact is anti-dilutive and therefore has no impact on the Company's earnings per share calculations. See Note 8: "Long-Term Debt" for further discussion of the conversion prices and other features of the Convertible Notes.

Treasury stock is recorded at cost and is presented as a reduction of stockholders' equity in the accompanying consolidated financial statements. Shares withheld upon the vesting of restricted stock units to pay applicable employee withholding taxes are considered common stock repurchases. Upon vesting, the Company currently does not collect the applicable employee withholding taxes from employees. Instead, the Company automatically withholds, from the restricted stock units that vest, the portion of those shares with a fair market value equal to the amount of the employee withholding taxes due, which is accounted for as a repurchase of common stock. The Company then pays the applicable withholding taxes in cash. The amounts remitted in the years ended December 31, 2011 and 2010 were $19.3 million and $15.0 million, respectively, for which the Company withheld 2,037,941 and 1,956,317 shares of common stock, respectively, that were underlying the restricted stock units that vested. None of these shares had been reissued or retired as of December 31, 2011, but may be reissued or retired by the Company at a later date.

Share-Based Compensation

12 Months Ended

Dec. 31, 2011

Share-Based Compensation [Abstract]

Share-Based Compensation

Note 11: Share-Based Compensation

Total share-based compensation expense related to the Company's employee stock options, restricted stock units, stock grant awards and employee stock purchase plan for the years ended December 31, 2011, 2010 and 2009 were comprised as follows (in millions):


	Year Ended December 31, 2011		Year Ended December 31, 2010		Year Ended December 31, 2009
Cost of revenues	$	6.3	$	14.1	$	13.7
Research and development		6.9		10.5		10.7
Selling and marketing		6.4		9.7		8.8
General and administrative		13.9		17.9		21.0
Restructuring		—		0.5		—

Share-based compensation expense before income taxes	$	33.5	$	52.7	$	54.2

Related income tax benefits (1)		—		—		—

Share-based compensation expense, net of taxes	$	33.5	$	52.7	$	54.2

(1)	Most of the Company's share-based compensation relates to its domestic subsidiaries, which have historically experienced recurring net operating losses; therefore, no related tax benefits are recorded.

At December 31, 2011, total unrecognized estimated share-based compensation expense, net of estimated forfeitures, related to non-vested stock options granted prior to that date was $7.9 million, which is expected to be recognized over a weighted average period of 2.0 years. At December 31, 2011, total unrecognized share-based compensation expense, net of forfeitures, related to non-vested restricted stock units with time-based service conditions and performance-based vesting criteria granted prior to that date was $25.6 million. The total intrinsic value of stock options exercised during the year ended December 31, 2011 was $35.7 million. The Company recorded cash received from the exercise of stock options of $59.4 million and cash from issuance of shares under the 2000 Employee Stock Purchase Plan ("ESPP") of $8.1 million and no related tax benefits during the year ended December 31, 2011. Upon option exercise, release of restricted stock units, stock grant awards, or completion of a purchase under the ESPP, the Company issues new shares of common stock.

Share-Based Compensation Information

The fair value of each option grant is estimated on the date of grant using a lattice-based option valuation model. The lattice-based model uses: (1) a constant volatility; (2) an employee exercise behavior model (based on an analysis of historical exercise behavior); and (3) the treasury yield curve to calculate the fair value of each option grant.

The weighted-average estimated fair value of employee stock options granted during the years ended December 31, 2011, 2010 and 2009 was $3.88 per share, $3.11 per share and $3.39 per share, respectively, and was calculated using the lattice-based model with the following weighted-average assumptions (annualized percentages):


	Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009
Volatility		52.1	%		46.8	%		54.9	%
Risk-free interest rate		1.2	%		1.7	%		2.4	%
Expected term		4.8 years			5.0 years			5.3 years

The volatility input is developed using blended volatility. The expected term of options represents the period of time that the options are expected to be outstanding. The expected term disclosure above is computed using the lattice model's estimated fair value as an input to the Black-Scholes formula and solving for expected term. The risk-free rate is based on zero-coupon U.S. Treasury yields in effect at the date of grant with the same period as the expected term.

Share-based compensation expense recognized in the Consolidated Statement of Operations is based on awards ultimately expected to vest. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Pre-vesting forfeitures for stock options were estimated to be approximately 11%, 12% and 12% in the years ended December 31, 2011, 2010, and 2009, respectively. Pre-vesting forfeitures for restricted stock units were estimated to be approximately 8%, 12% and 12% in the years ended December 31, 2011, 2010, and 2009, respectively.

The Company uses the Black-Scholes option-pricing model to calculate the fair value of shares issued under the ESPP. The weighted-average fair value of shares issued under the ESPP during the years ended December 31, 2011, 2010 and 2009 were $2.09 per share, $1.71 per share and $1.57 per share, respectively. The weighted-average assumptions used in the pricing model are as follows:


Employee Stock Purchase Plan	Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009
Expected life (in years)		0.25			0.25			0.25
Risk-free interest rate		0.05	%		0.14	%		0.15	%
Volatility		39	%		39	%		83	%

Plan Descriptions

On February 17, 2000, the Company adopted the 2000 Stock Incentive Plan (the "2000 SIP") which provides key employees, directors and consultants with various equity-based incentives as described in the plan document. The 2000 SIP is administered by the Board of Directors or a committee thereof, which was authorized to determine, among other things, the key employees, directors or consultants who receive awards under the plan, the amount and type of award, exercise prices or performance criteria, if applicable, and vesting schedules. Through December 31, 2004, stockholders had approved amendments to the 2000 SIP which increased the number of shares of the Company's common stock reserved and available for grant to 30.5 million, plus an additional number of shares of the Company's common stock equal to 3% of the total number of outstanding shares of common stock effective automatically on January 1st of each year beginning January 1, 2005 and ending January 1, 2010. On February 17, 2010, the 2000 SIP expired and the Company ceased granting under the plan. Outstanding options and awards as of the expiration date continue to be outstanding and exercisable or subject to vesting pursuant to the underlying grant agreements.

In March 2008, the Company assumed approximately 9.4 million employee stock options and 1.1 million restricted stock unit awards in accordance with applicable NASDAQ listing standards under the AMIS Holdings, Inc. Amended and Restated 2000 Equity Incentive Plan, which has not been approved by the Company's stockholders, but which was approved by AMIS' stockholders. Approximately 4.9 million shares were added to the 2000 SIP as a result of the assumption of the number of shares remaining available for grant under the AMIS Holdings, Inc. Employee Stock Purchase Plan and the AMIS Holdings, Inc. Amended and Restated 2000 Equity Incentive Plan.

In October 2008, the Company assumed approximately 3.9 million employee stock options and 0.4 million restricted stock unit awards in accordance with applicable NASDAQ listing standards under the following plans, which have not been approved by the Company's stockholders, but which were approved by Catalyst's stockholders: the Catalyst Options Amended and Restated 2003 Stock Incentive Plan, the Catalyst 2003 Director Stock Option Plan, and the Catalyst 1998 Special Equity Incentive Plan.

In January 2010, the Company assumed approximately 2.4 million employee stock options in accordance with applicable NASDAQ listing standards under the following plans, which have not been approved by the Company's stockholders, but which were approved by California Micro Devices stockholders: the California Micro Devices Corporation 2004 Omnibus Incentive Compensation Plan, the California Micro Devices Corporation 1995 Non-Employee Directors' Stock Option Plan, and the California Micro Devices Corporation 1995 Employee Stock Option Plan. In addition, the Company assumed approximately 0.3 million employee stock options in accordance with applicable NASDAQ listing standards pursuant to agreements between California Micro Devices Corporation and certain employees.

On March 23, 2010, the Company adopted the ON Semiconductor Corporation Amended and Restated Stock Incentive Plan ("the Amended and Restated SIP"), which was subsequently approved by the Company's shareholders at the annual shareholder meeting on May 18, 2010. The Amended and Restated SIP provides key employees, directors and consultants with various equity-based incentives as described in the plan document. The Amended and Restated SIP is administered by the Board of Directors or a committee thereof, which is authorized to determine, among other things, the key employees, directors or consultants who will receive awards under the plan, the amount and type of award, exercise prices or performance criteria, if applicable, and vesting schedules. The total number of shares of stock subject to all awards under the Amended and Restated SIP is 26.1 million, plus the number of shares of stock subject to awards that were previously granted and outstanding pursuant to the 2000 SIP that upon cancellation may again become available for grant under the Amended and Restated SIP pursuant to the plan document.

Generally, the options granted under the 2000 SIP and Amended and Restated SIP vest over a period of four years and have a term of 10 years and 7 years, respectively. Under both plans, certain outstanding options vest automatically upon a change of control, as defined in the respective plan document, provided the option holder is employed by the Company on the date of the change in control. Certain other outstanding options may also vest upon a change of control if the Board of Directors of the Company, at its discretion, provides for acceleration of the vesting of said options. Upon the termination of an option holder's employment, all unvested options will immediately terminate and vested options will generally remain exercisable for a period of 90 days after the date of termination (one year in the case of death or disability), unless otherwise specified in an option holder's employment or stock option agreement.

Generally, restricted stock units granted under the 2000 SIP and the Amended and Restated SIP vest over three to four years or based on the achievement of certain performance criteria and are payable in shares of the Company's stock upon vesting.

As of December 31, 2011, there was an aggregate of 17.4 million shares of common stock available for grant under the Amended and Restated SIP.

Stock Options

A summary of stock option transactions for all stock option plans follows (in millions except per share and term data):


	Year Ended December 31, 2011
	Number of Shares			Weighted-Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Outstanding at December 31, 2010		27.4		$	7.44
Granted		1.1			8.71
Exercised		(8.7	)		6.82
Canceled		(1.1	)		9.28
Outstanding at December 31, 2011		18.7		$	7.70		4.6	$	19.0

Exercisable at December 31, 2011		14.5			7.80		4.0	$	15.4

As of December 31, 2011, the Company had 18.2 million stock options vested and expected to vest outstanding with a weighted average exercise price of $7.70.

Net stock options, after forfeitures and cancellations, granted during the years ended December 31, 2011 and December 31, 2010 represented 0.02% and (0.20)% of outstanding shares as of the beginning of each such fiscal year, respectively. Total stock options granted during the years ended December 31, 2011 and December 31, 2010 represented 0.25% and 0.41% of outstanding shares as of the end of each such fiscal year, respectively.

Additional information about stock options outstanding at December 31, 2011 with exercise prices less than or above $7.72 per share, the closing price of the Company's common stock at December 31, 2011, follows (number of shares in millions):


	Exercisable				Unexercisable				Total
Exercise Prices	Number of Shares		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price
Less than $7.72		7.4	$	5.65		2.3	$	6.12		9.7	$	5.76
Above $7.72		7.1	$	10.03		1.9	$	8.80		9.0	$	9.77

Total Outstanding		14.5	$	7.80		4.2	$	7.33		18.7	$	7.70

Restricted Stock Units

During 2011, the Company awarded 3.6 million restricted stock units to certain officers and employees of the Company that vest upon the achievement of certain performance criteria. The number of units expected to vest is evaluated each reporting period and compensation expense is recognized for those units for which achievement of the performance criteria is considered probable.

As of December 31, 2011, the Company determined that it is probable that certain of the criteria relating to performance-based restricted stock units granted during the current and prior years will be met. Compensation expense of $13.7 million was recognized during the year for all performance based restricted stock units. Additional compensation expense of $7.2 million was recognized during the year for all restricted stock units with time-based service conditions that were granted in 2011 and prior that are expected to vest.

A summary of the restricted stock units transactions for the year ended December 31, 2011 follows (number of shares in millions):


	Year Ended December 31, 2011
	Number of Shares			Weighted-Average Grant Date Fair Value
Nonvested shares of restricted stock units at December 31, 2010		12.3		$	5.19
Granted		5.1			10.04
Released		(6.5	)		4.47
Forfeited		(1.3	)		7.41

Nonvested shares of restricted stock units at December 31, 2011		9.6		$	7.95

As of December 31, 2011, unrecognized compensation expense net of estimated forfeitures related to non-vested restricted stock units granted under the 2000 SIP and Amended and Restated SIP with time-based and performance-based conditions was $15.3 million and $10.3 million, respectively. For restricted stock units with time-based service conditions, expense is being recognized over the vesting period; for restricted stock units with performance criteria, expense is being recognized over the period during which the performance criteria is expected to be met. Unrecognized compensation cost related to awards with certain performance criteria that are not expected to be met is not included here. Total compensation expense related to both performance based and service based restricted stock units was $20.9 million for the year ended December 31, 2011.

Stock Grant Awards

During the year ended December 31, 2011, the Company granted 0.1 million shares in restricted stock awards with immediate vesting and with a weighted average grant date fair value of $10.55 per share. Total compensation expense related to stock grant awards for the year ended December 31, 2011 was $1.5 million.

Employee Stock Purchase Plan

On February 17, 2000, the Company adopted the ESPP. Subject to local legal requirements, each of the Company's eligible employees has the right to elect to have up to 10% of his or her eligible payroll applied towards the purchase of shares of the Company's common stock at a price equal to 85% of the fair market value of such shares as determined under the plan. Employees are limited to annual purchases of $25,000 under this plan. In addition, during each quarterly offering period, employees may not purchase stock exceeding the lesser of (i) 500 shares, or (ii) the number of shares equal to $6,250 divided by the fair market value of the stock on the first day of the offering period. During the years ended December 31, 2011, 2010 and 2009, employees purchased for each such year approximately 1.2 million shares under the plan,. Through May 2009, shareholders have approved amendments to the ESPP, which have increased the number of shares of the Company's common stock issuable thereunder to 15 million shares. As of December 31, 2011, there were 4.1 million shares available for issuance under the ESPP.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

Employee Benefit Plans

12 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Employee Benefit Plans

Note 12: Employee Benefit Plans

Defined Benefit Plans

Benefits under all of the Company's plans are valued utilizing the projected unit credit cost method. The Company's policy is to fund its defined benefit plans in accordance with local requirements and regulations. The Company expects to contribute $15.3 million in 2012. As discussed below, the 2012 funding is primarily driven by the Company's current assessment of the economic environment and projected benefit payments of its foreign subsidiaries. The Company's measurement date for determining its defined benefit obligations for all plans is December 31 of each year.

Certain of the Company's foreign subsidiaries provide retirement plans for substantially all of their employees. Such plans conform to local practice in terms of providing minimum benefits mandated by law, collective agreements or customary practice. The weighted average assumed rate of return on plan assets for these plans for 2012 is 3.30%. The Company's expected long-term rate of return on plan assets is updated at least annually, taking into consideration its asset allocation, historical returns on similar types of assets and the current economic environment. For estimation purposes, the Company assumes its long-term asset mix will generally be consistent with the current mix. The Company determines its discount rates using AA rated corporate bond yields and long term government bond yields.

The Company recognizes actuarial gains and losses in net periodic pension cost during the fourth quarter of each year, which is the period the Company's annual pension plan actuarial valuations are prepared.

The following is a summary of the status of the Company's foreign defined benefit pension plans and the net periodic pension cost (dollars in millions):


	Year Ended December 31,
	2011			2010			2009
Service cost	$	9.4		$	3.8		$	4.0
Interest cost		5.2			3.1			3.6
Expected return on plan assets		(4.0	)		(2.8	)		(2.6	)
Amortization of prior service cost		2.6			1.1			(4.9	)
Curtailment loss		2.0			—			—
Other losses (gains)		(3.1	)		—			0.3

Total net periodic pension cost	$	12.1		$	5.2		$	0.4

Weighted average assumptions
Discount rate		3.50	%		4.65	%		5.61	%
Expected return on plan assets		4.07	%		4.75	%		5.16	%
Rate of compensation increase		4.66	%		3.87	%		4.06	%


	December 31,
	2011			2010
Change in projected benefit obligation
Projected benefit obligation at the beginning of the year	$	74.8		$	68.6
Benefit obligation incurred through acquisition		87.9			—
Service cost		9.4			3.8
Interest cost		5.2			3.1
Net actuarial (gain) or loss		(7.8	)		1.5
Benefits paid by plan assets		(3.2	)		(1.1	)
Curtailment		2.0			—
Plan amendments		2.6			—
Translation (gain) or loss and other		5.5			(1.1	)

Projected benefit obligation at the end of the year	$	176.4		$	74.8

Accumulated benefit obligation at the end of the year	$	134.7		$	56.3

Change in plan assets
Fair value of plan assets at the beginning of the year	$	65.9		$	65.8
Plan assets incurred through acquisition		35.7			—
Actual return on plan assets		(0.7	)		3.3
Benefits paid from plan assets		(3.2	)		(1.0	)
Employer contributions		5.8			1.4
Translation gain or (loss)		2.0			(3.6	)

Fair value of plan assets at the end of the year	$	105.5		$	65.9

Plans with underfunded or non-funded projected benefit obligation:
Aggregate accumulated benefit obligation	$	108.4		$	38.9
Aggregate fair value of plan assets	$	52.0		$	17.4
Plans with underfunded or non-funded accumulated benefit obligation:
Aggregate accumulated benefit obligation	$	102.2		$	24.7
Aggregate fair value of plan assets	$	49.8		$	7.7
Amounts recognized in the balance sheet of consist of:
Noncurrent assets	$	12.4		$	13.8
Current liabilities		(11.4	)		(0.2	)
Non-current liabilites		(71.9	)		(22.5	)

Funded status	$	(70.9	)	$	(8.9	)

Amounts recognized in accumulated other comprehensive income consist of:
Prior service cost	$	0.1		$	0.2

Weighted average assumptions at the end of the year
Discount rate		3.50	%		4.65	%
Rate of compensation increase		4.66	%		3.87	%

As of December 31, 2011 and 2010, respectively, the assets of the Company's foreign plans were invested 17% and 67% in equity securities, 25% and 9% in debt securities, 56% and 24% in other investments and 2% and zero in cash, which included investment contracts and other short-term investments. This asset allocation is based on the anticipated required funding amounts, timing of benefit payments, historical returns on similar assets and the current economic environment.

The long term rate of return on plan assets was determined using the weighted average method, which incorporates factors that include the historical inflation, interest rate yield curve and current market condition

Plan Assets

The Company's overall investment strategy is to focus on wealth protection, invest in safe and low credit risk investments with the goal to provide a positive rate of return to the plan assets. The Company is investing in a mix of investments with a wide diversification of asset types and fund strategies that align with each region and foreign location's economy and market conditions. Investment in government securities and government agencies, where the returns are guaranteed by the government, has been constructed in order to achieve the returns needed to cover the plan liabilities. Investment in fixed income securities and equity securities is with the expectation that the investments shall give a good rate of return in the long run despite periods of volatility or decline. Other types of investments include investments in cash deposits, money market funds and insurance.

The fair value measurement of plan assets in the Company's foreign pension plans as of December 31, 2011 and 2010, was as follows (in millions):


	December 31, 2011
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash/Money Markets	$	2.5	$	2.5	$	—	$	—
Foreign Government Securities (1)		56.1		51.5		4.6		—
Corporate Bonds, Debentures (2)		26.7		21.2		1.4		4.1
Equity Securities (3)		17.7		16.0		1.7		—
Mutual Funds		0.3		0.3		—		—
Real Estate Fund		0.1		—		0.1		—
Insurance Contracts (4)		2.1		—		1.1		1.0

	$	105.5	$	91.5	$	8.9	$	5.1


	December 31, 2010
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash/Money Markets	$	—	$	—	$	—	$	—
Foreign Government Securities		48.1		27.6		17.5		3.0
Agency Securities		1.5		—		1.5		—
Corporate Bonds, Debentures		10.8		3.2		4.1		3.5
Equity Securities		4.1		2.0		2.1		—
Mutual Funds		0.3		0.3		—		—
Real Estate Fund		0.1		—		0.1		—
Insurance Contracts		1.0		—		—		1.0

	$	65.9	$	33.1	$	25.3	$	7.5

(1)	This category includes investments in guaranteed returns securities.

(2)	This category includes investments in government bonds and corporate bonds of developed countries, emerging market government bonds, emerging market corporate bonds and convertible bonds, of which 54% of bond securities were invested in Japan.

(3)	This category includes investments in equity securities of developed countries and emerging markets, of which 53% were invested in Japan.

(4)	This category refers to investments with insurance companies' General Account. The General Account guarantees a minimum rate of return to the investment.

When available, the Company uses observable market data, including pricing on recent closed market transactions and quoted prices, which are included in Level 2. When data is unobservable, valuation methodologies using comparable market data are utilized and included in Level 3. Activity during the year ended December 31, 2011 for plan assets with fair value measurement using significant unobservable inputs (Level 3) was as follows (in millions):


	Foreign Government Securities			Corporate Bonds, Debentures		Insurance			Total
Balance at December 31, 2009	$	2.4		$	2.6	$	1.0		$	6.0
Actual return on plan assets:
Relating assets still held at the reporting date		—			0.2		0.2			0.4
Relating assets sold during the period		—			—		—			—
Purchases, sales and settlements		0.6			0.7		(0.2	)		1.1
Transfers in and/or out of Level 3		—			—		—			—

Balance at December 31, 2010		3.0			3.5		1.0			7.5

Actual return on plan assets:
Relating assets still held at the reporting date		—			—		—			—
Relating assets sold during the period		—			—		—			—
Purchases, sales and settlements		—			—		—			—
Transfers in and/or out of Level 3		(3.0	)		0.6		—			(2.4	)

Balance at December 31, 2011	$	—		$	4.1	$	1.0		$	5.1

The expected benefit payments for the Company's defined benefit plans by year from 2012 through 2016 and the five years thereafter are as follows (in millions):

2012	$	15.3
2013		3.6
2014		3.6
2015		4.0
2016		4.0
5 years thereafter		—

Total	$	30.5

The total underfunded status was $70.9 million at December 31, 2011. The Company expects to contribute $15.3 million during 2012 to its foreign defined benefit plans.

Multi Employer Pension Plans

As discussed in Note 4: "Acquisitions," the Company is now responsible for contributing to several multi-employer benefit plans as a result of the SANYO Semiconductor transaction. During the year ended December 31, 2011, the Company contributed $20.0 million to these plans. At the time of the acquisition, the Company recorded $144.9 million of estimated liabilities associated with its estimated portion of underfunded pension obligations relating to certain employees participating in the SANYO Electric or its affiliate multi-employer defined benefit plans, from which the Company intends to withdraw. In addition, affiliates of SANYO Semiconductor participate in multi-employer plans from which the Company does not intend to withdraw. Approximately 1,740 and 430 current employees participate in such multi-employer benefit plans from which the Company plans to withdraw and in which there is no intention to withdraw, respectively. The balance as of December 31, 2011 related to these plans was $151.0 million. We anticipate having the Company sponsored single employer plan established by December 31, 2012.

The Company contributes to various foreign (Japanese) multi-employer plans that provide retirement benefits to participants based upon their service to contributing employers. The benefits are paid from assets held in trust for that purpose and where a shortfall exists, the employers are obligated to fund in accordance with the local regulatory requirements.

SANYO Semiconductor entities also participate in multi-employer plans, the SANYO Federation Employee's Pension Fund and the Tokyo Electric Industry Employee's Pension Fund, from which the Company does not intend to withdraw.

The Company recognizes expense associated with the plans from which the Company intends to withdraw based upon a number of actuarial assumptions, including a discount rate for plan obligations, assumed rate of return on pension plan assets and assumed rate of compensation increases for plan employees. All of these assumptions are based upon management's judgment and consultation with an actuary, considering all known trends and uncertainties. The Company recognized an expense of $44.8 million for 2011 relating to participation in these plans. The contributions made to the SANYO Electric Company Group Defined Benefit Corporate Pension Fund and the KSS Defined Benefit Corporate Pension Plan were more than 5% of the total contributions to each of those plans.

The Company recognizes expense in connection with its ongoing participation in the multi-employer plans from which the Company does not intend to withdraw as the contributions become due. The Company made contributions of $0.9 million for 2011. The contribution made to each of these plans by the Company was less than 5% of the total contribution made to each of the respective plans.

The current funded status of the SANYO Electric Company Group Defined Benefit Corporate Pension Fund is 66%, the KSS Defined Benefit Corporate Pension Plan is 76%, the SANYO Federation Employee's Pension Fund is 86% and the Tokyo Electric Industry Employee's Pension Fund is 89% as of March 31, 2011, which is the most recent data that has been made available to the Company.

The Company is in the process of withdrawing from the SANYO Electric Company Group Defined Benefit Corporate Pension Fund and KSS Defined Benefit Corporate Pension Plan, and it does not expect any additional exit funding requirements or penalty costs associated with its withdrawal.

For multi-employer plans from which the Company intends to continue its participation, the Company does not routinely review information on the actuarial present value of the unfunded benefits allocable to the Company, if any, and it is not presently aware of any contingent liability if it were to withdraw from any of these plans.

Defined Contribution Plans

The Company has a deferred compensation savings plan (the "Savings Plan") for all eligible U.S. employees established under the provisions of Section 401(k) of the Internal Revenue Code. Eligible employees may contribute a percentage of their salary subject to certain limitations. The Company has elected to have a matching contribution of 100% of the first 4% of employee contributions. The Company recognized $8.7 million, $7.9 million and $6.5 million of expense relating to matching contributions in 2011, 2010 and 2009, respectively.

Certain foreign subsidiaries have defined contribution plans in which eligible employees participate. The Company recognized compensation expense of $2.0 million, $0.4 million and $0.3 million relating to these plans for the years ended 2011, 2010 and 2009, respectively.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Financial Instruments

12 Months Ended

Dec. 31, 2011

Financial Instruments [Abstract]

Financial Instruments

Note 13: Financial Instruments

Foreign Currencies

As a multinational business, the Company's transactions are denominated in a variety of currencies. When appropriate, the Company uses forward foreign currency contracts to reduce its overall exposure to the effects of currency fluctuations on its results of operations and cash flows. The Company's policy prohibits trading in currencies for which there are no underlying exposures, or entering into trades for any currency to intentionally increase the underlying exposure.

The Company primarily hedges existing assets and liabilities and cash flows associated with transactions currently on its balance sheet.

At December 31, 2011 and 2010, the Company had net outstanding foreign exchange contracts in a buy position with a net notional amount of $203.4 million and $75.5 million, respectively. Such contracts were obtained through financial institutions and were scheduled to mature within three months. Management believes that these financial instruments should not subject the Company to increased risks from foreign exchange movements because gains and losses on these contracts should offset losses and gains on the assets, liabilities and transactions being hedged. The following schedule shows the Company's net foreign exchange positions in U.S. dollars as of December 31, 2011 and 2010 (in millions):


	December 31,
	2011 Buy (Sell)			2011 Notional Amount		2010 Buy (Sell)			2010 Notional Amount
Canadian Dollar	$	(1.4	)	$	1.4	$	—		$	—
Chinese Renminbi		(12.8	)		12.8		(5.4	)		5.4
Czech Koruna		6.8			6.8		7.8			7.8
Euro		(30.8	)		30.8		(19.2	)		19.2
Indian Rupee		(2.8	)		2.8		—			—
Japanese Yen		(100.0	)		100.0		4.6			4.6
Korean Won		1.0			1.0		1.8			1.8
Malaysian Ringgit		29.4			29.4		26.1			26.1
Philippine Peso		5.1			5.1		7.3			7.3
Singapore Dollar		2.7			2.7		3.3			3.3
Thai Bhat		3.4			3.4		—			—
Taiwan Dollar		(7.2	)		7.2		—			—

	$	(106.6	)	$	203.4	$	26.3		$	75.5

The Company is exposed to credit-related losses if counterparties to its foreign exchange contracts fail to perform their obligations. At December 31, 2011, the counterparty on the Company's foreign exchange contracts is a highly rated financial institution and no credit-related losses are anticipated. Amounts payable or receivable under the contracts are included in other current assets or accrued expenses in the accompanying consolidated balance sheet. For 2011, 2010 and 2009, realized and unrealized foreign currency transaction losses totaled $8.9 million, $6.9 million and $4.7 million, respectively.

Other

At December 31, 2011, the Company had no outstanding commodity derivatives, currency swaps or options relating to either its debt instruments or investments. The Company does not hedge the value of its equity investments in its subsidiaries or affiliated companies.

Fair Value Of Financial Instruments

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Fair Value Of Financial Instruments

Note 14: Fair Value of Financial Instruments

The following table summarizes the Company's financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2011 and December 31, 2010 (in millions):


Description	Balance as of December 31, 2011		Quoted Prices in Active Markets (Level 1)		Balance as of December 31, 2010		Quoted Prices in Active Markets (Level 1)
Assets:
Cash and cash equivalents:
Demand and time deposits	$	455.3	$	455.3	$	309.4	$	309.4
Money market funds		—		—		46.1		46.1
Treasuries		131.1		131.1		267.8		267.8
Commercial paper		50.9		50.9		—		—
Corporate bonds		15.6		15.1		—		—
Other Current Assets
Foreign currency exchange contracts	$	0.7	$	0.7	$	1.1	$	1.1

Liabilities:
Foreign currency exchange contracts	$	0.1	$	0.1	$	0.6	$	0.6

The Company's financial assets and liabilities are valued using market prices on active markets (Level 1). Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets. Cash and cash equivalents are short-term, highly liquid investments with original or remaining maturities of three months or less when purchased. The Company's short-term investments balance of $248.6 million is classified as held-to-maturity securities and is carried at amortized cost, which excludes $0.2 million of unrealized losses as of December 31, 2011.

As of December 31, 2011, the Company held no direct investments in auction rate securities, collateralized debt obligations, structured investment vehicles or mortgage-backed securities.

Long-Term Debt, Including Current Portion

The carrying amounts and fair values of the Company's long-term borrowings (excluding capital lease obligations, real estate mortgages and equipment financing) at December 31, 2011 and December 31, 2010 are as follows (in millions):


	December 31, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt, including current portion
Convertible Notes	$	567.1	$	683.9	$	579.7	$	818.0
Long-term debt	$	496.6	$	462.0	$	160.7	$	155.1

The fair value of the Convertible Notes was estimated based on quoted market prices. The fair value of other long-term debt was estimated based on discounting the remaining principal and interest payments using current market rates for similar debt at December 31, 2011 and December 31, 2010.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Commitments And Contingencies

12 Months Ended

Dec. 31, 2011

Commitments And Contingencies [Abstract]

Commitments And Contingencies

Note 15: Commitments and Contingencies

Leases

The following is a schedule by year of future minimum lease obligations under non-cancelable operating leases as of December 31, 2011 (in millions):


Year Ending December 31,
2012	$	22.0
2013		17.1
2014		14.1
2015		11.7
2016		12.6
Thereafter		16.4

Total	$	93.9

The Company's existing leases do not contain significant restrictive provisions; however, certain leases contain renewal options and provisions for payment by the Company of real estate taxes, insurance and maintenance costs. Total rent expense associated with operating leases for 2011, 2010, and 2009 was $27.7 million, $22.2 million, and $20.3 million, respectively.

Other Contingencies

The Company's headquarters and manufacturing facility in Phoenix, Arizona is located on property that is a "Superfund" site, a property listed on the National Priorities List and subject to clean-up activities under the Comprehensive Environmental Response, Compensation, and Liability Act. Motorola, Inc. ("Motorola"), and now Freescale Semiconductor, Inc. ("Freescale"), have been involved in the cleanup of on-site solvent contaminated soil and groundwater and off-site contaminated groundwater pursuant to consent decrees with the State of Arizona. As part of the August 4, 1999 recapitalization, Motorola retained responsibility for this contamination, and Motorola and Freescale have agreed to indemnify the Company with respect to remediation costs and other costs or liabilities related to this matter.

In the Czech Republic, the Company has ongoing remediation projects to respond to releases of hazardous substances that occurred during the years that this facility was operated by government-owned entities. In each case, the remediation project consists primarily of monitoring groundwater wells located on-site and off-site with additional action plans developed to respond in the event activity levels are exceeded at each of the respective locations. The government of the Czech Republic has agreed to indemnify the Company and the respective subsidiaries, subject to specified limitations, for remediation costs associated with this historical contamination. Based upon the information available, total future remediation costs to the Company are not expected to be material.

The Company's design center in East Greenwich, Rhode Island is located on property that has localized soil contamination. In connection with the purchase of the facility, the Company entered into a Settlement Agreement and Covenant Not To Sue with the State of Rhode Island. This agreement requires that remedial actions be undertaken and a quarterly groundwater monitoring program be initiated by the former owners of the property. Based on the information available, any costs to the Company in connection with this matter are not expected to be material.

As a result of the acquisition of AMIS, the Company is a "primary responsible party" to an environmental remediation and cleanup at AMIS's former corporate headquarters in Santa Clara, California. Costs incurred by AMIS include implementation of the clean-up plan, operations and maintenance of remediation systems, and other project management costs. However, AMIS's former parent company, a subsidiary of Nippon Mining, contractually agreed to indemnify AMIS and the Company for any obligation relating to environmental remediation and cleanup at this location. The Company has not offset the receivable from Nippon Mining's subsidiary against the estimated liability on the consolidated balance sheet. Therefore, a receivable from Nippon Mining's subsidiary is recorded on the accompanying consolidated balance sheet as of December 31, 2011 related to this matter for approximately $0.1 million. The Company does not believe that the liability and receivable amounts are material to the Company's consolidated financial position, results of operations or cash flow.

The Company's manufacturing location in Aizu, Japan is located on property where soil and ground water contamination has been detected. The Company believes that the contamination originally occurred during a time when the facility was operated by a prior owner. The Company is working with local authorities to determine the appropriate remediation actions and expects remediation costs, subject to certain limitations, to be indemnified pursuant to an agreement between the Company and the prior owner or covered by insurance subject to a deductible. Based on information available, any costs to the Company in connection with this matter are not expected to be material.

A bank guarantee issued on behalf of the Company under a non-reusable commitment credit with the bank has an outstanding amount of $3.6 million as of December 31, 2011. The Belgian bank that issued the guarantee has the right to create a mortgage on the real property of one of the Company's European subsidiaries in the amount of $3.0 million, but had not done so as of December 31, 2011. The Company also has outstanding guarantees and letters of credit outside of its non-reusable commitment credit totaling $9.1 million as of December 31, 2011.

As part of securing financing in the normal course of business, the Company issued guarantees related to its receivables financing, capital lease obligations and real estate mortgages which totaled approximately $118.1 million as of December 31, 2011. The Company is also a guarantor of SCI LLC's unsecured loan with SANYO Electric, which had a balance of $339.8 million as of December 31, 2011. See Note 8: "Long-Term Debt" for further discussion of this loan.

For its operating leases, the Company expects to make cash payments and similarly incur expenses totaling $93.9 million as payments come due. The Company has not recorded any liability in connection with these operating leases, letters of credit and guarantee arrangements.

Based on historical experience and information currently available, the Company believes that in the foreseeable future it will not be required to make payments under the standby letters of credit or guarantee arrangements.

Indemnification Contingencies

The Company is a party to a variety of agreements entered into in the ordinary course of business pursuant to which it may be obligated to indemnify the other parties for certain liabilities that arise out of or relate to the subject matter of the agreements. Some of the agreements entered into by the Company require it to indemnify the other party against losses due to intellectual property infringement, property damage including environmental contamination, personal injury, failure to comply with applicable laws, the Company's negligence or willful misconduct, or breach of representations and warranties and covenants related to such matters as title to sold assets.

The Company faces risk of exposure to warranty and product liability claims in the event that its products fail to perform as expected or such failure of its products results, or is alleged to result, in bodily injury or property damage (or both). In addition, if any of the Company's designed products are alleged to be defective, the Company may be required to participate in their recall. Depending on the significance of any particular customer and other relevant factors, the Company may agree to provide more favorable indemnity rights to such customer for valid warranty claims.

The Company has, from time to time, been active in merger and acquisition activity. In connection with these mergers or acquisitions, the Company has agreed to indemnify the other party or parties to the merger or acquisition agreement for certain claims or occurrences, limited in most instances by time and/or monetary amounts.

The Company and its subsidiaries provide for indemnification of directors, officers and other persons in accordance with limited liability agreements, certificates of incorporation, by-laws, articles of association or similar organizational documents, as the case may be. The Company maintains directors' and officers' insurance, which should enable it to recover a portion of any future amounts paid.

In addition to the above, from time to time the Company provides standard representations and warranties to counterparties in contracts in connection with sales of its securities and the engagement of financial advisers and also provides indemnities that protect the counterparties to these contracts in the event they suffer damages as a result of a breach of such representations and warranties or in certain other circumstances relating to the sale of securities or their engagement by the Company.

While the Company's future obligations under certain agreements may contain limitations on liability for indemnification, other agreements do not contain such limitations and under such agreements it is not possible to predict the maximum potential amount of future payments due to the conditional nature of the Company's obligations and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under any of these indemnities have not had a material effect on the Company's business, financial condition, results of operations or cash flows. Additionally, the Company does not believe that any amounts that it may be required to pay under these indemnities in the future will be material to the Company's business, financial position, results of operations or cash flows.

Legal Matters

The Company is currently involved in a variety of legal matters that arise in the normal course of business. Based on information currently available, management does not believe that the ultimate resolution of these matters, including the matters described or referred to in the next paragraphs will have a material effect on the Company's financial condition, results of operations or cash flows. However, because of the nature and inherent uncertainties of litigation, should the outcome of these actions be unfavorable, the Company's business, consolidated financial position, results of operations or cash flows could be materially and adversely affected.

Securities Class Action Litigation

During the period of July 5, 2001 through July 27, 2001, the Company was named as a defendant in three shareholder class action lawsuits that were filed in federal court in New York City against it and certain of the Company's former officers, current and former directors and the underwriters of the Company's initial public offering. The lawsuits allege violations of the federal securities laws and have been docketed in the U.S. District Court for the Southern District of New York ("District Court") as: Abrams v. ON Semiconductor Corp., et al., C.A. No 01-CV-6114; Breuer v. ON Semiconductor Corp., et al., C.A. No. 01-CV-6287; and Cohen v. ON Semiconductor Corp., et al., C.A. No. 01-CV-6942. On April 19, 2002, the plaintiffs filed a single consolidated amended complaint that supersedes the individual complaints originally filed. The amended complaint alleges, among other things, that the underwriters of the Company's initial public offering improperly required their customers to pay the underwriters excessive commissions and to agree to buy additional shares of the Company's common stock in the aftermarket as conditions of receiving shares in its initial public offering. The amended complaint further alleges that these supposed practices of the underwriters should have been disclosed in the Company's initial public offering prospectus and registration statement. The amended complaint alleges violations of both the registration and antifraud provisions of the federal securities laws and seeks unspecified damages. The Company understands that various other plaintiffs have filed substantially similar class action cases against approximately 300 other publicly-traded companies and their public offering underwriters in New York City, which have all been transferred, along with the case against the Company, to a single federal district court judge for purposes of coordinated case management. The Company believes that the claims against it are without merit and has defended, and intends to continue to defend, the litigation vigorously. The litigation process is inherently uncertain, however, and the Company cannot guarantee that the outcome of these claims will be favorable for the Company.

As previously disclosed, the parties advised the District Court on February 25, 2009 that they had reached an agreement-in-principle to settle the litigation in its entirety. A stipulation of settlement was filed with the District Court on April 2, 2009. On June 9, 2009, the District Court preliminarily approved the proposed global settlement. Notice was provided to the class, and a settlement fairness hearing, at which members of the class had an opportunity to object to the proposed settlement, was held on September 10, 2009. On October 6, 2009, the District Court issued an order granting final approval to the settlement. Ten appeals were filed objecting to the definition of the settlement class and fairness of the settlement. On January 10, 2012, the last remaining appeal was dismissed with prejudice, as a result of which the settlement became final by its terms. The Company has no financial liability in connection with the settlement.

Other Matters

On December 15, 2010, a lawsuit was filed in the United States District Court for the District of Delaware (the "Court") captioned Robert A. Lorber v. Francis P. Barton, George H. Cave, Donald A. Colvin, Curtis J. Crawford, Ph.D., Emmanuel T. Hernandez, Phillip D. Hester, Keith D. Jackson, J. Daniel McCranie, Robert Mahoney, W. John Nelson, Daryl Ostrander, Robert H. Smith, and ON Semiconductor Corporation, C.A. No. 1:10-CV-01101-GMS. The lawsuit was brought by a stockholder of ON Semiconductor Corporation and alleges generally that (1) ON Semiconductor Corporation's 2010 proxy statement contained materially false and misleading information regarding our Amended and Restated Stock Incentive Plan ("Plan") in violation of the federal securities laws; (2) the Plan was defective and, thus, any awards made pursuant to the Plan would not be tax-deductible pursuant to Section 162(m) of the Internal Revenue Code and applicable regulations; and (3) the individual defendants (who are ON Semiconductor Corporation officers and directors) violated their state law fiduciary duties and wasted corporate assets in connection with the adoption of the Plan. The Company moved to dismiss the lawsuit. On November 23, 2011, the parties entered into a memorandum of understanding (the "Memorandum") that sets forth the terms of a settlement which, if approved by the Court, will result in the dismissal of this action. In the Memorandum, the Company and the other individual defendants have denied and continue to deny that they committed any of the wrongful acts alleged in this lawsuit, and maintain that they have diligently, scrupulously, and meticulously complied with their fiduciary and other legal duties. The parties have provided the Court with a copy of the Memorandum, and will soon submit for the Court's approval a stipulation of settlement and other papers needed to effect a resolution of this lawsuit. While the Company makes no assurances or guarantees as to the outcome of this proceeding, based upon our current knowledge, the Company believes that the final result of this action will have no material effect on our consolidated financial position, results of operations, or cash flows.

In the normal course of business, the Company faces risk of exposure to warranty and product liability claims. Related to this, the Company (through its subsidiary SANYO Semiconductor) has received a request from one of its customers to pay to the customer an amount currently estimated by the customer to be approximately $20.0 million in respect of costs incurred or to be incurred by the customer and its customers in remedying certain alleged failures of SANYO Semiconductor products sold to the customer prior to the Company's acquisition of SANYO Semiconductor. The Company is in the early stages of conducting investigations and evaluations of this matter, including fact finding and assessing possible liability, available defenses, mitigating circumstances and possible third-party indemnity coverage. It is difficult to predict with certainty the ultimate loss exposure to ON Semiconductor; however, management believes that a number of defenses are available to the Company and it would expect to defend itself vigorously against any formal claim that may be asserted. While the Company makes no assurances or guarantees as to the outcome of this claim, based upon its current knowledge, the Company believes that the final result of this matter will have no material effect on our consolidated financial position, results of operations, or cash flows.

On December 27, 2011, 111 former employees of the Company's subsidiary SANYO Semiconductor Thailand ("SSTH"), which manufacturing operations were located in the Rojana Industrial Park in Ayutthaya, Thailand ("Rojana Park"), filed complaints with the Labor Region 1 Court in Lopburi Province in Thailand, seeking damages against SSTH for unfair termination under Thailand's labor laws. On January 19, 2012, four additional former employees filed similar complaints with the Labor Region 1 Court in Lopburi Province in Thailand against SSTH. Both cases are based on the widespread flooding in Thailand that occurred in the fourth quarter of 2011 and affected the Rojana Park. The floods severely damaged SSTH's buildings, equipment and other property at its Rojana Park location and resulted in SSTH deciding to cease certain operations in Thailand and to ask its employees to resign. The lawsuits seek a total of approximately $17.6 million which includes alleged damages for: (1) wages calculated based on the employee's last wage rate from the date of termination through the date of retirement; (2) mental anguish; (3) lost bonuses; and/or (4) other damages. The Company is in the process of evaluating the facts and legal issues. The Company denies the substantive allegations of the lawsuits and expects to vigorously defend against them.

See Part I, Item 1 "Business-Government Regulation" of this 2011 Form 10-K for information on certain environmental matters.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Supplemental Disclosure Of Cash Flow Information

12 Months Ended

Dec. 31, 2011

Supplemental Disclosure Of Cash Flow Information [Abstract]

Supplemental Disclosure Of Cash Flow Information

Note 16: Supplemental Disclosure of Cash Flow Information

The Company's non-cash financing activities and cash payments for interest and income taxes are as follows (in millions):


	Year ended December 31,
	2011			2010			2009
Non-cash investing activities:
Common stock issued for debt repurchase	$	—		$	—		$	28.5
Non-cash financing activities:
Capital expenditures in accounts payable	$	58.8		$	69.2		$	21.4
Equipment acquired or refinanced through capital leases		24.9			69.2			6.6
Cash (received) paid for:
Interest income	$	(1.1	)	$	(0.5	)	$	(0.8	)
Interest expense		31.8			23.6			26.7
Income taxes		20.4			10.6			8.5

Segment Information

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Segment Information

Note 17: Segment Information

In the fourth quarter of 2011, the Company changed its organizational structure and previously-reported information has been recast to reflect the current organizational structure. The Company is organized into four operating segments, which also represent four reporting segments: computing and consumer products group, automotive, industrial, medical and mil-aero products group, standard products group and SANYO Semiconductor products group. Each of the Company's major product lines has been examined and each product line has been assigned to a segment, as illustrated in the table below, based on the Company's operating strategy. Because many products are sold into different end-markets, the total revenue reported for a segment is not indicative of actual sales in the end-market associated with that segment, but rather is the sum of the revenue from the product lines assigned to that segment. These segments represent the Company's view of the business and as such are used to evaluate progress of major initiatives.


Computing & Consumer Products	Automotive, Industrial, Medical and Mil-Aero Products	Standard Products	SANYO Semiconductor Products
DC-DC Conversion	Automotive Application Specific Standard Products ("ASSPs")	Bipolar Power	Power MOSFETs
Analog Switches	Analog Automotive	Thyristor	IGBTs

AC-DC Conversion	Automotive Power Switching	Small Signal	Power and Signal Discretes
Low Voltage Power Management	Automotive Mixed-Signal solutions	Zener	Intelligent Power Modules
Standard Logic	Medical ASICs & ASSPs	Protection	Motor Driver ICs
Power Switching	Linear Light Sensors	Rectifier	Display Drivers
Signal & Interface	CMOS Image Sensors	Filters	ASICs
LDO & Vregs	Military & Aerospace	MOSFETs	Microcontrollers
	Mixed Signal ASICs		Flash Memory
	Industrial ASSPs		Touch Sensor
	High Frequency / Timing		Power Supply IC
	EE Memory and Programmable Analog		Audio DSP

	Integrated Passive Devices ("IPD")		Audio Tuners
	Foundry and Manufacturing Services		Image stabilizer ICs
	Hearing Components

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The Company evaluates performance based on income or loss from operations before interest, nonrecurring gains and losses, foreign exchange gains and losses, income taxes, restructuring, asset impairments and other, net, goodwill impairment and certain other unallocated manufacturing and operating expenses.

The Company's wafer manufacturing facilities fabricate integrated circuits for all business units as necessary and their operating costs are reflected in the segments' cost of revenues on the basis of product costs. Because operating segments are generally defined by the products they design and sell, they do not make sales to each other. The Company does not discretely allocate assets to its operating segments, nor does management evaluate operating segments using discrete asset information. From time to time, the Company reassesses the alignment of its product families and devices to its operating segments and may move product families or individual devices from one operating segment to another.

In addition to the operating and reporting segments mentioned above, the Company also operates global operations, sales and marketing, information systems, finance and administration groups that are led by vice presidents who report to the Chief Executive Officer. A portion of the expenses of these groups are allocated to the segments based on specific and general criteria and are included in the operating results reported below. The Company does not allocate income taxes or interest expense to its operating segments as the operating segments are principally evaluated on operating profit before interest and taxes. Additionally, restructuring, asset impairments and other, net and certain other manufacturing and operating expenses, which includes corporate research and development costs, unallocated inventory reserves and miscellaneous nonrecurring expenses, are not allocated to any segment.

Revenues, gross profit and operating income for the Company's reportable segments for the years ended December 31, 2011, December 31, 2010 and December 31, 2009, respectively, are as follows (in millions):


	Computing & Consumer Products Group		Automotive, Industrial, Medical and Mil-Aero Products Group		Standard Products Group		SANYO Semiconductor Products Group			Total
For year ended December 31, 2011:
Revenues from external customers	$	609.1	$	894.7	$	878.2	$	1,060.3		$	3,442.3
Segment gross profit	$	238.3	$	450.9	$	295.5	$	79.1		$	1,063.8
Segment operating income (loss)	$	103.0	$	165.5	$	176.9	$	(159.4	)	$	286.0

For year ended December 31, 2010:
Revenues from external customers	$	609.1	$	794.7	$	909.6	$	—		$	2,313.4
Segment gross profit	$	257.4	$	415.3	$	339.1	$	—		$	1,011.8
Segment operating income	$	122.7	$	154.2	$	221.2	$	—		$	498.1

For year ended December 31, 2009:
Revenues from external customers	$	473.0	$	623.8	$	672.1	$	—		$	1,768.9
Segment gross profit	$	158.7	$	292.0	$	205.2	$	—		$	655.9
Segment operating income	$	45.0	$	67.2	$	114.6	$	—		$	226.8

Depreciation and amortization expense is included in segment operating income. Reconciliations of segment gross profit and segment operating income to the financial statements are as follows (in millions):


	Year Ended
	December 31, 2011			December 31, 2010			December 31, 2009
Gross profit for reportable segments	$	1,063.8		$	1,011.8		$	655.9
Unallocated amounts:
Other unallocated manufacturing costs	$	(55.0	)	$	(55.8	)	$	(35.2	)

Gross profit	$	1,008.8		$	956.0		$	620.7

Operating income for reportable segments	$	286.0		$	498.1		$	226.8
Unallocated amounts:
Restructuring and other charges		(102.7	)		(10.5	)		(24.9	)
Goodwill and intangible impairment		—			(16.1	)		—
Other unallocated manufacturing costs		(55.0	)		(55.8	)		(35.2	)
Other unallocated operating expenses		(14.9	)		(41.5	)		(24.1	)

Operating income	$	113.4		$	374.2		$	142.6

Certain operating expenses are not allocated to reportable segments. The decrease in other unallocated operating expenses from $41.5 million in 2010 to $14.9 million in 2011 was primarily due to the Company's focus on ensuring operating expenses are properly allocated. The increase in other unallocated operating expenses from $24.1 million in 2009 to $41.5 million in 2010 was primarily due to incremental research and development expenses in our Gresham wafer fabrication facility.

The Company operates in various geographic locations. Sales to unaffiliated customers have little correlation with the location of manufacturers. It is, therefore, not meaningful to present operating profit by geographical location. The Company conducts a substantial portion of its operations outside of the United States and is subject to risks associated with non-U.S. operations, such as political risks, currency controls and fluctuations, tariffs, import controls and air transportation.

Revenues by geographic location including local sales and exports made by operations within each area, based on shipments from the respective country, are summarized as follows (in millions):


	Year Ended
	December 31, 2011		December 31, 2010		December 31, 2009
United States	$	524.0	$	483.2	$	374.2
Other Americas		36.6		12.3		5.4
United Kingdom		424.7		373.0		258.2
Belgium		3.7		0.7		29.5
China		1,053.8		762.4		565.4
Japan		494.8		59.5		51.7
Singapore		683.3		540.8		387.3
Other Asia/Pacific		221.4		81.5		97.2

	$	3,442.3	$	2,313.4	$	1,768.9

Property, plant and equipment, net by geographic location, are summarized as follows (in millions):


	December 31, 2011		December 31, 2010
United States	$	257.5	$	223.7
China		96.7		97.0
Europe		117.9		104.6
Malaysia		164.5		137.4
Other Asia/Pacific		260.2		178.3
Japan		130.2		70.8
Belgium		70.0		47.8
Other Americas		12.5		4.7

	$	1,109.5	$	864.3

For the year ended December 31, 2011, there was no individual customer which accounted for more than 10.0% of the Company's total revenues. For the years ended December 31, 2010 and December 31, 2009, one of the Company's customers accounted for 13.0% and 11.0% of the Company's total revenues, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Guarantor And Non-Guarantor Statements

12 Months Ended

Dec. 31, 2011

Guarantor And Non-Guarantor Statements [Abstract]

Guarantor And Non-Guarantor Statements

Note: 18 Guarantor and Non-Guarantor Statements

ON Semiconductor is the sole issuer of the Zero Coupon Convertible Senior Subordinated Notes due 2024, the 1.875% Convertible Senior Subordinated Notes due 2025, the 2.625% Convertible Senior Subordinated Notes due 2026 and the 2.625% Convertible Senior Subordinated Notes due 2026, Series B (collectively, the "Convertible Notes"). ON Semiconductor's domestic subsidiaries, except those domestic subsidiaries acquired through the acquisitions of AMIS, Catalyst Semiconductor, Inc. ("Catalyst"), PulseCore Holdings (Cayman) Inc. ("PulseCore"), CMD, SDT, and SANYO Semiconductor (collectively, the "Guarantor Subsidiaries"), fully and unconditionally guarantee on a joint and several basis ON Semiconductor's obligations under the Convertible Notes. The Guarantor Subsidiaries include SCI LLC, Semiconductor Components Industries of Rhode Island, Inc., as well as other holding companies whose net assets consist primarily of investments in the joint venture in Leshan, China and equity interests in the Company's other foreign subsidiaries. ON Semiconductor's other remaining subsidiaries (collectively, the "Non-Guarantor Subsidiaries") are not guarantors of the Convertible Notes. The repayment of the unsecured Convertible Notes is subordinated to the senior indebtedness of ON Semiconductor and the Guarantor Subsidiaries on the terms described in the indentures for such Convertible Notes. Condensed consolidated financial information for the issuer of the Convertible Notes, the Guarantor Subsidiaries and the Non-Guarantor Subsidiaries is as follows (in millions):


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2011
Cash and cash equivalents	$	—			304.5			(0.2	)	$	348.6			—		$	652.9
Short-term investments		—			248.6			—			—			—			248.6
Receivables, net		—			64.7			—			392.5			—			457.2
Inventories		—			36.2			—			599.3			1.9			637.4
Other current assets		—			7.5			—			114.1			—			121.6
Deferred income taxes, net of allowances		—			5.5			—			4.5			—			10.0

Total current assets		—			667.0			(0.2	)		1,459.0			1.9			2,127.7
Property, plant and equipment, net		—			255.2			2.3			854.5			(2.5	)		1,109.5
Deferred income taxes, net of allowances		—			—			—			34.2			—			34.2
Goodwill		—			125.7			37.3			35.7			—			198.7
Intangible assets, net		—			152.3						215.0			(30.1	)		337.2
Investments and other assets		2,036.2			1,303.5			59.1			846.9			(4,169.5	)		76.2

Total assets	$	2,036.2		$	2,503.7		$	98.5		$	3,445.3		$	(4,200.2	)	$	3,883.5

Accounts payable	$	—		$	32.8			0.1			418.9			—		$	451.8
Accrued expenses		—			61.0			0.8			176.3			1.7			239.8
Income taxes payable		—			(0.1	)		—			7.6			—			7.5
Accrued interest		0.6			—			—			0.1			—			0.7
Deferred income on sales to distributors		—			43.7			—			128.3			—			172.0
Deferred income taxes, net of allowances		—			—			—			33.6			—			33.6
Current portion of long-term debt		182.6			74.1			—			113.4			—			370.1

Total current liabilities		183.2			211.5			0.9			878.2			1.7			1,275.5
Long-term debt		384.5			393.8			—			58.6			—			836.9
Other long-term liabilities		—			26.6			0.4			233.1			—			260.1
Deferred income tax, net of allowances		—			5.5			—			12.0			—			17.5
Intercompany		0.3			(318.2	)		(54.5	)		166.9			205.5			—

Total liabilities		568.0			319.2			(53.2	)		1,348.8			207.2			2,390.0
Common stock		5.0			0.3			50.9			146.9			(198.1	)		5.0
Additional paid-in capital		3,113.5			2,711.2			238.4			1,359.2			(4,308.8	)		3,113.5
Accumulated other comprehensive loss		(46.7	)		(46.7	)		—			(39.2	)		85.9			(46.7	)
Accumulated deficit		(1,202.3	)		(480.3	)		(137.6	)		629.6			(11.7	)		(1,202.3	)
Less: treasury stock, at cost		(401.3	)		—			—			—			—			(401.3	)

Total ON Semiconductor Corporation stockholders' equity (deficit)		1,468.2			2,184.5			151.7			2,096.5			(4,432.7	)		1,468.2
Minority interests in consolidated subsidiaries		—			—			—			—			25.3			25.3

Total equity		1,468.2			2,184.5			151.7			2,096.5			(4,407.4	)		1,493.5

Total liabilities and equity	$	2,036.2		$	2,503.7		$	98.5		$	3,445.3		$	(4,200.2	)	$	3,883.5


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2010
Cash and cash equivalents	$	—		$	392.3		$	—		$	231.0		$	—		$	623.3
Receivables, net		—			47.4			—			247.2			—			294.6
Inventories		—			48.0			—			299.9			12.9			360.8
Other current assets		—			14.9			—			48.7			—			63.6
Deferred income taxes, net of allowances		—			5.6			—			10.1			—			15.7

Total current assets		—			508.2			—			836.9			12.9			1,358.0
Restricted Cash		—			142.1			—			—			—			142.1
Property, plant and equipment, net		—			221.0			2.6			644.1			(3.4	)		864.3
Goodwill		—			125.7			37.2			28.3			—			191.2
Intangible assets, net		—			165.4			—			172.0			(34.4	)		303.0
Investments and other assets		1,946.6			1,131.2			51.4			830.0			(3,898.6	)		60.6

Total assets	$	1,946.6		$	2,293.6		$	91.2		$	2,511.3		$	(3,923.5	)	$	2,919.2

Accounts payable	$	—		$	43.4		$	0.1		$	213.4		$	—		$	256.9
Accrued expenses		—			82.1			0.8			78.0			1.7			162.6
Income taxes payable		—			0.9			—			4.2			—			5.1
Accrued interest		0.6			—			—			0.2			—			0.8
Deferred income on sales to distributors		—			33.7			—			115.8			—			149.5
Current portion of long-term debt		—			33.0			—			103.0			—			136.0

Total current liabilities		0.6			193.1			0.9			514.6			1.7			710.9
Long-term debt		579.7			103.0			—			70.1			—			752.8
Other long-term liabilities		—			21.1			0.4			27.8			—			49.3
Deferred income taxes, net of allowances		—			5.6			—			12.6			—			18.2
Intercompany		0.3			(123.8	)		(53.4	)		(28.6	)		205.5			—

Total liabilities		580.6			199.0			(52.1	)		596.5			207.2			1,531.2
Common stock		4.9			0.3			50.9			146.9			(198.1	)		4.9
Additional paid-in capital		3,016.1			2,502.2			178.5			1,110.7			(3,791.4	)		3,016.1
Accumulated other comprehensive loss		(59.1	)		(59.1	)		—			(52.3	)		111.4			(59.1	)
Accumulated deficit		(1,213.9	)		(348.8	)		(86.1	)		709.5			(274.6	)		(1,213.9	)
Less: treasury stock, at cost		(382.0	)		—			—			—			—			(382.0	)

Total ON Semiconductor Corporation stockholders' equity (deficit)		1,366.0			2,094.6			143.3			1,914.8			(4,152.7	)		1,366.0
Minority interests in consolidated subsidiaries		—			—			—			—			22.0			22.0

Total equity		1,366.0			2,094.6			143.3			1,914.8			(4,130.7	)		1,388.0

Total liabilities and equity	$	1,946.6		$	2,293.6		$	91.2		$	2,511.3		$	(3,923.5	)	$	2,919.2


	Issuer			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2011
Revenues	$	—		$	788.9		$	13.9		$	3,985.7		$	(1,346.2	)	$	3,442.3
Cost of product revenues		—			531.5			0.8			3,236.4			(1,335.2	)		2,433.5

Gross profit		—			257.4			13.1			749.3			(11.0	)		1,008.8

Research and development		—			167.6			10.7			184.2			—			362.5
Selling and marketing		—			70.4			1.0			123.7			—			195.1
General and administrative		—			84.0			0.7			107.7			—			192.4
Amortization of acquisition related intangible assets		—			18.0			—			28.8			(4.1	)		42.7
Restructuring, asset impairments and other, net		—			3.4			—			99.3			—			102.7

Total operating expenses		—			343.4			12.4			543.7			(4.1	)		895.4

Operating income (loss)		—			(86.0	)		0.7			205.6			(6.9	)		113.4
Interest expense		(50.8	)		(8.5	)		—			(9.6	)		—			(68.9	)
Interest income		—			0.4			—			0.7			—			1.1
Other		—			(3.1	)		—			(5.8	)		—			(8.9	)
Loss on debt repurchase and exchange		(23.2	)		—			—			—			—			(23.2	)
Gain (loss) on SANYO Semiconductor acquisition		(0.1	)		24.4			—			—			—			24.3
Equity in earnings		85.7			151.6			7.7			—			(245.0	)		—

Income (loss) before income taxes		11.6			78.8			8.4			190.9			(251.9	)		37.8
Income tax provision					1.5						(24.4	)					(22.9	)

Net income (loss)		11.6			80.3			8.4			166.5			(251.9	)		14.9
Net income (loss) attributable to minority interest		—			—			—			—			(3.3	)		(3.3	)

Net income (loss) attributable to ON Semiconductor Corporation	$	11.6		$	80.3		$	8.4		$	166.5		$	(255.2	)	$	11.6

Net cash provided by operating activities				$	221.1		$	—		$	324.4					$	545.5

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(69.0	)		(0.2	)		(247.2	)		—			(316.4	)
Purchase of a business, net of cash acquired		—			24.3			—			(42.2	)		—			(17.9	)
Recovery from insurance on property, plant and equipment											13.3						13.3
Proceeds from sale of property, plant and equipment		—			0.1			—			3.2			—			3.3
Deposits utilized for purchases of property, plant and equipment		—			—			—			0.5			—			0.5
Proceeds from held-to-maturity securities		—			122.2			—			—			—			122.2
Purchase of held-to-maturity securities		—			(370.8	)		—			—			—			(370.8	)
Change in restricted cash		—			142.1			—			—			—			142.1

Net cash used in investing activities		—			(151.1	)		(0.2	)		(272.4	)		—			(423.7	)

Cash flows from financing activities:
Intercompany loans		—			(289.3	)		—			289.3			—			—
Intercompany loan repayments		—			182.2			—			(182.2	)		—			—
Proceeds from debt issuance		—			12.2			—			56.8			—			69.0
Proceeds from issuance of common stock under employee stock purchase plan		—			8.1			—			—			—			8.1
Proceeds from exercise of stock options		—			59.4			—									59.4
Purchase of Treasury Stock		—			(19.3	)		—			—			—			(19.3	)
Payment of capital lease obligation		—			(36.4	)		—			(2.6	)					(39.0	)
Repurchase of 2.625% Convertible Senior Subordinated Notes due 2026		—			(56.2	)		—			—			—			(56.2	)
Payment made in connection with exchange of 2.625% convertible senior subordinated notes due 2026		—			(15.9	)		—			—			—			(15.9	)
Repayment of long term debt		—			(2.6	)		—			(100.7	)		—			(103.3	)

Net cash used in financing activities		—			(157.8	)		—			60.6			—			(97.2	)

Effect of exchange rate changes on cash and cash equivalents											5.0						5.0

Net increase (decrease) in cash and cash equivalents		—			(87.8	)		(0.2	)		117.6			—			29.6
Cash and cash equivalents, beginning of period		—			392.3			—			231.0						623.3

Cash and cash equivalents, end of period	$	—		$	304.5		$	(0.2	)	$	348.6		$	—		$	652.9


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2010
Revenues	$	—		$	632.4		$	14.0		$	2,850.7		$	(1,183.7	)	$	2,313.4
Cost of product revenues		—			495.4			1.8			2,051.6			(1,191.4	)		1,357.4

Gross profit		—			137.0			12.2			799.1			7.7			956.0

Research and development		—			12.1			9.8			226.1			—			248.0
Selling and marketing		—			67.7			0.9			77.0			—			145.6
General and administrative		—			19.5			0.8			109.6			—			129.9
Amortization of acquisition related intangible assets		—			17.1			—			18.8			(4.2	)		31.7
Goodwill and intangible asset impairment		—			—			—			16.1			—			16.1
Restructuring, asset impairments and other, net		—			7.1			—			3.4			—			10.5

Total operating expenses		—			123.5			11.5			451.0			(4.2	)		581.8

Operating income (loss)		—			13.5			0.7			348.1			11.9			374.2
Interest expense		(50.8	)		(6.6	)		—			(4.0	)		—			(61.4	)
Interest income		—			0.2			—			0.3			—			0.5
Other		—			3.2			—			(10.1	)		—			(6.9	)
Loss on debt repurchase		0.1			(0.8	)		—			—			—			(0.7	)
Equity in earnings		341.2			735.3			5.5			—			(1,082.0	)		—

Income (loss) before income taxes		290.5			744.8			6.2			334.3			(1,070.1	)		305.7
Income tax provision		—			3.7			—			(16.5	)		—			(12.8	)

Net income (loss)		290.5			748.5			6.2			317.8			(1,070.1	)		292.9
Net income (loss) attributable to minority interest		—			—			—			—			(2.4	)		(2.4	)

Net income (loss) attributable to ON Semiconductor Corporation	$	290.5		$	748.5		$	6.2		$	317.8		$	(1,072.5	)	$	290.5

Net cash provided by operating activities	$	—		$	419.9		$	0.2		$	131.7		$	—		$	551.8

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(59.6	)		(0.2	)		(129.1	)		—			(188.9	)
Purchase of a business, net of cash acquired		—			—			—			(91.0	)		—			(91.0	)
Proceeds from sale of property, plant and equipment		—			37.1			—			—			—			37.1
Deposits utilized for purchases of property, plant and equipment		—			—			—			(2.2	)		—			(2.2	)
Change in restricted cash		—			(142.1	)		—			5.9			—			(136.2	)
Proceeds from held-to-maturity securities		—			—			—			45.5			—			45.5

Net cash used in investing activities		—			(164.6	)		(0.2	)		(170.9	)		—			(335.7	)

Cash flows from financing activities:
Intercompany loans		—			(666.9	)		—			666.9			—			—
Intercompany loan repayments		—			672.7			—			(672.7	)		—			—
Proceeds from issuance of common stock under the employee stock purchase plan		—			7.0			—			—			—			7.0
Proceeds from debt issuance		—			33.0			—			119.0			—			152.0
Proceeds from exercise of stock options		—			23.3			—			—			—			23.3
Payment of capital lease obligation		—			(29.8	)		—			(2.5	)		—			(32.3	)
Purchase of treasury stock		—			(15.0	)		—			—			—			(15.0	)
Repayment of long term debt		—			(173.3	)					(81.1	)		—			(254.4	)

Net cash used in financing activities		—			(149.0	)		—			29.6			—			(119.4	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—			0.9			—			0.9

Net increase (decrease) in cash and cash equivalents		—			106.3			—			(8.7	)		—			97.6
Cash and cash equivalents, beginning of period		—			286.0			—			239.7			—			525.7

Cash and cash equivalents, end of period	$	—		$	392.3		$	—		$	231.0		$	—		$	623.3


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2009
Revenues	$	—		$	512.5		$	12.1	$	2,291.5		$	(1,047.2	)	$	1,768.9
Cost of product revenues		—			399.1			1.7		1,794.1			(1,046.7	)		1,148.2

Gross profit		—			113.4			10.4		497.4			(0.5	)		620.7

Research and development		—			40.8			8.1		150.0			(0.1	)		198.8
Selling and marketing		—			48.0			0.8		72.1			—			120.9
General and administrative		—			(49.2	)		0.6		110.7			42.4			104.5
Amortization of acquisition related intangible assets		—			12.5			—		19.4			(2.9	)		29.0
Restructuring, asset impairments and other, net		—			3.3			—		21.6			—			24.9

Total operating expenses		—			55.4			9.5		373.8			39.4			478.1

Operating income (loss)		—			58.0			0.9		123.6			(39.9	)		142.6
Interest expense		(52.2	)		(6.5	)		—		(5.9	)		—			(64.6	)
Interest income		—			0.4			—		0.3			0.1			0.8
Other		—			(1.4	)		—		(3.3	)		—			(4.7	)
Loss on debt repurchase		(3.1	)		—			—		—			—			(3.1	)
Gain (loss) on acquisition		—			—			—		—			—			—
Equity in earnings		116.3			72.4			5.4		119.4			(313.5	)		—

Income (loss) before income taxes		61.0			122.9			6.3		234.1			(353.3	)		71.0
Income tax provision		—			5.2			—		(12.9	)		—			(7.7	)

Net income (loss)		61.0			128.1			6.3		221.2			(353.3	)		63.3
Net income (loss) attributable to minority interest		—			—			—		—			(2.3	)		(2.3	)

Net income (loss) attributable to ON Semiconductor Corporation	$	61.0		$	128.1		$	6.3	$	221.2		$	(355.6	)	$	61.0

Net cash provided by operating activities	$	—		$	(217.3	)	$	—	$	496.6		$	—		$	279.3

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(9.4	)		—		(45.9	)		—			(55.3	)
Purchase of a business, net of cash acquired		—			—			—		(16.7	)		—			(16.7	)
Deposits utilized for purchases of property, plant and equipment		—			—			—		0.3			—			0.3
Proceeds from sales of property, plant and equipment		—			—			—		(3.2	)		—			(3.2	)
Proceeds from held-to-maturity securities		—			—			—		52.4			—			52.4
Purchase of held-to-maturity securities		—			—			—		(97.9	)		—			(97.9	)
Change in restricted cash		—			—			—		(5.9	)		—			(5.9	)

Net cash used in investing activities		—			(9.4	)		—		(116.9	)		—			(126.3	)

Cash flows from financing activities:
Intercompany loans		—			(123.6	)		—		123.6			—			—
Intercompany loan repayments		—			501.5			—		(501.5	)		—			—
Proceeds from issuance of common stock under the employee stock purchase plan		—			5.5			—		—			—			5.5
Proceeds from debt issuance		—			—			—		79.5			—			79.5
Proceeds from exercise of stock options		—			17.5			—		—			—			17.5
Purchase of Treasury Stock		—			(8.6	)		—		—			—			(8.6	)
Payment of capital lease obligation		—			(23.4	)		—		(6.1	)		—			(29.5	)
Repayment of long term debt		—			(69.6	)		—		(81.0	)		—			(150.6	)

Net cash used in financing activities		—			299.3			—		(385.5	)		—			(86.2	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—		0.2			—			0.2

Net increase (decrease) in cash and cash equivalents		—			72.6			—		(5.6	)		—			67.0
Cash and cash equivalents, beginning of period		—			213.4			—		245.3			—			458.7

Cash and cash equivalents, end of period	$	—		$	286.0		$	—	$	239.7		$	—		$	525.7

(1)	ON Semiconductor is a holding Company and has no operations apart from those of its operating subsidiaries. Additionally, ON Semiconductor does not maintain a bank account; rather SCI LLC, its primary domestic operating subsidiary, processes all of its cash receipts and disbursements on its behalf.

See also Note 15: "Commitments and Contingencies—Other Contingencies" for further discussion of the Company's guarantees.

Supplementary Data Selected Quarterly Data

12 Months Ended

Dec. 31, 2011

Supplementary Data Selected Quarterly Data [Abstract]

Supplementary Data Selected Quarterly Data

SUPPLEMENTARY DATA

SELECTED QUARTERLY DATA (UNAUDITED)

Consolidated quarterly financial information for 2011 and 2010 follows (in millions, except per share data):


	Quarter ended 2011
	April 1		July 1		September 30			December 31
Revenues	$	870.6	$	905.8	$	898.0		$	767.9
Gross Profit		242.4		266.1		261.1			239.2
Net income (loss) attributable to ON Semiconductor Corporation		35.5		34.3		(49.4	)		(8.8	)
Diluted net income (loss) per common share attributable to ON Semiconductor Corporation	$	0.08	$	0.07	$	(0.11	)	$	(0.02	)

	Quarter ended 2010
	April 2		July 2		October 1			December 31
Revenues	$	550.2	$	583.3	$	600.7		$	579.2
Gross Profit		228.1		243.8		246.5			237.6
Net income attributable to ON Semiconductor Corporation		63.0		78.7		87.8			61.0
Diluted net income per common share attributable to ON Semiconductor Corporation	$	0.14	$	0.18	$	0.20		$	0.14

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

+ References + Details

Valuation And Qualifying Accounts And Reserves

12 Months Ended

Dec. 31, 2011

Valuation And Qualifying Accounts And Reserves [Abstract]

Valuation And Qualifying Accounts And Reserves

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

(in millions)


Description	Balance at Beginning of Period		Charged to Costs and Expenses			Charged to Other Accounts			Deductions/ Write-offs			Balance at End of Period
Allowance for doubtful accounts
Year ended December 31, 2009	$	10.2	$	(0.5	)	$	—		$	(0.4	)	$	9.3
Year ended December 31, 2010	$	9.3	$	(1.8	)	$	—		$	(0.2	)	$	7.3
Year ended December 31, 2011	$	7.3	$	(0.3	)	$	—		$	—		$	7.0
Allowance for deferred tax assets
Year ended December 31, 2009	$	606.8	$	(56.4	)	$	—		$	—		$	550.4
Year ended December 31, 2010	$	550.4	$	10.4		$	—		$	—		$	560.8
Year ended December 31, 2011	$	560.8	$	170.1		$	895.2	(1)	$	—		$	1,626.1

(1)	Represents $895.2 million for deferred tax assets acquired from SANYO Semiconductor.

Significant Accounting Policies (Policy)

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Principles Of Consolidation

Principles of Consolidation

Use Of Estimates

Use of Estimates

Cash And Cash Equivalents

Cash and cash equivalents

Short-Term Investments

Short-Term Investments


	Balance at December 31, 2011
	Carried at Amortized Cost		Unrealized Gain/(Loss)			Fair Value
Short-term investments-held-to-maturity:
Commercial paper	$	101.0	$	(0.1	)	$	100.9
Corporate bonds		128.6		(0.1	)		128.5
Government agencies		19.0		—			19.0

	$	248.6	$	(0.2	)	$	248.4

Restricted Cash

Restricted Cash

Allowance For Doubtful Accounts

<div> Allowance for Doubtful Accounts In the normal course of business, the Company provides unsecured credit terms to its customers. Accordingly, the Company maintains an allowance for doubtful accounts for possible losses on uncollectible accounts receivable. The Company routinely analyzes accounts receivable and considers history, customer creditworthiness, facts and circumstances specific to outstanding balances, current economic trends, and payment term changes when evaluating adequacy of the allowance for doubtful accounts. For uncollectible accounts receivable, the Company records a loss against the allowance for doubtful accounts only after exhaustive efforts have been made to collect and with management's approval. Generally, realized losses have been within the range of management's expectations.</div>

Inventories

Inventories

Property, Plant And Equipment

Property, Plant and Equipment

Business Combination Purchase Price Allocation

Business Combination Purchase Price Allocation

Goodwill

Goodwill

Intangible Assets

Intangible Assets

Debt Issuance Costs

Debt Issuance Costs

Revenue Recognition

Revenue Recognition

Freight and handling costs are included in cost of revenues and are recognized as period expense during the period in which they are incurred.

Research And Development Costs

Research and Development Costs

Research and development costs are expensed as incurred.

Share-Based Compensation

Share-Based Compensation

Income Taxes

Income Taxes

Foreign Currencies

Foreign Currencies

Defined Benefit Plans

Defined Benefit Plans

Multi-Employer Benefit Plans

Multi-Employer Benefit Plans

Contingencies

Contingencies

Fair Value Measurement

Fair Value Measurement

•

Level 1—Quoted prices in active markets for identical assets or liabilities;

•

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Short-Term Investments Classified As Held-To-Maturity


	Balance at December 31, 2011
	Carried at Amortized Cost		Unrealized Gain/(Loss)			Fair Value
Short-term investments-held-to-maturity:
Commercial paper	$	101.0	$	(0.1	)	$	100.9
Corporate bonds		128.6		(0.1	)		128.5
Government agencies		19.0		—			19.0

	$	248.6	$	(0.2	)	$	248.4

- Definition

Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5086-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

+ Details

Goodwill And Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill And Intangible Assets [Abstract]

Summary Of Goodwill By Operating Segment


	Balance as of December 31, 2011										Balance as of December 31, 2010
	Original Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value		Original Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value
Operating Segment:
Automotive, Industrial, Medical and Mil-Aero	$	556.6	$	(4.2	)	$	(406.0	)	$	146.4	$	549.1	$	(4.2	)	$	(406.0	)	$	138.9
Computing & Consumer Products		29.1		(5.6	)		—			23.5		29.1		(5.6	)		—			23.5
Standard Products		37.7		—			(8.9	)		28.8		37.7		—			(8.9	)		28.8

	$	623.4	$	(9.8	)	$	(414.9	)	$	198.7	$	615.9	$	(9.8	)	$	(414.9	)		191.2

Summary Of Change In Goodwill


Net balance as of December 31, 2010	$	191.2
Additions due to business combination		7.5

Net balance as of December 31, 2011	$	198.7

Summary Of Intangible Assets, Net


	December 31, 2011
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(8.0	)	$	—		$	—		$	5.9		5-12
Assembled workforce		6.7		(6.7	)		—			—			—		5
Customer relationships		280.3		(71.9	)		(26.5	)		(3.2	)		178.7		5-18
Patents		43.7		(10.4	)		—			—			33.3		12
Developed technology		145.6		(35.5	)		—			(2.0	)		108.1		5-12
Trademarks		14.0		(3.4	)		—						10.6		15
In-process research and development		3.1		—			—			(2.5	)		0.6
Backlog		0.8		(0.8	)		—			—			—		0.3

Total intangibles	$	508.1	$	(136.7	)	$	(26.5	)	$	(7.7	)	$	337.2


	December 31, 2010
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.0	)	$	—		$	—		$	6.9		5-12
Assembled workforce		6.7		(6.1	)		—			—			0.6		5
Customer relationships		250.5		(51.2	)		(27.2	)		(3.2	)		168.9		5-18
Patents		16.7		(4.2	)		—			—			12.5		12
Developed technology		113.0		(22.5	)		—			(2.0	)		88.5		5-12
Trademarks		11.0		(1.7	)		—			—			9.3		15
In-process research and development		18.3		—			—			(2.0	)		16.3

Total intangibles	$	430.1	$	(92.7	)	$	(27.2	)	$	(7.2	)	$	303.0

Summary Of Amortization Expense


	Total
2012	$	44.3
2013		39.6
2014		38.4
2015		37.3
2016		34.4
Thereafter		142.6

Total estimated amortization expense	$	336.6

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2011

Business Acquisition [Line Items]

Unaudited Proforma Consolidated Results Of Operations


	Proforma For Year Ended December 31, 2010
Net Revenues	$	3,848.2
Net Income	$	104.1
Net income per common share — Basic	$	0.24
Net income per common share — Diluted	$	0.23

Acquisition Of SANYO Semiconductor Co., Ltd. [Member]

Business Acquisition [Line Items]

Schedule Of Purchase Price Allocation


	Initial Estimate			Adjustments			Final
Cash and cash equivalents	$	117.1		$	—		$	117.1
Receivables, net		242.1			—			242.1
Inventories		423.9			(23.6	)		400.3
Deferred income taxes current		0.5			—			0.5
Other current assets		119.2			—			119.2
Property, plant and equipment		148.0			(1.3	)		146.7
Deferred income taxes, non-current		60.5			—			60.5
Intangible assets		55.7			—			55.7
Other non-current assets		14.9			—			14.9

Total assets acquired		1,181.9			(24.9	)		1,157.0

Accounts payable		(300.0	)		—			(300.0	)
Deferred income taxes, current		(70.3	)		1.5			(68.8	)
Other current liabilities		(61.3	)		(21.9	)		(83.2	)
Deferred income taxes, non-current		(0.5	)		—			(0.5	)
Long-term accrued liabilities		(187.9	)		(12.4	)		(200.3	)

Total liabilities assumed		(620.0	)		(32.8	)		(652.8	)
Net assets acquired		561.9			(57.7	)		504.2
Gain on acquisition		(61.3	)		37.0			(24.3	)

Purchase price	$	500.6		$	(20.7	)	$	479.9

Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]

Business Acquisition [Line Items]

Schedule Of Purchase Price Allocation


	Initial Estimate			Adjustments			Final
Cash and cash equivalents	$	1.5					$	1.5
Receivables, net		2.6						2.6
Inventories		9.2						9.2
Other current assets		0.4						0.4
Property, plant and equipment		1.2						1.2
Goodwill		8.0			(0.5	)		7.5
Intangible assets		11.2						11.2
In-process research and development		11.2						11.2

Total assets acquired		45.3			(0.5	)		44.8

Accounts payable		(5.6	)					(5.6	)
Other current liabilities		(4.2	)		0.5			(3.7	)
Other non-current liabilities		(1.4	)					(1.4	)

Total liabilities assumed		(11.2	)		0.5			(10.7	)

Net assets acquired	$	34.1		$	—		$	34.1

Acquisition Of Sound Design Technologies LTD [Member]

Business Acquisition [Line Items]

Schedule Of Purchase Price Allocation


Receivables, net	$	3.3
Inventories		7.8
Other current assets		1.0
Property, plant and equipment		2.7
Goodwill		5.9
Intangible assets		2.4
In-process research and development		2.8
Other non-current assets		2.0

Total assets acquired		27.9

Accounts payable		(2.2	)
Other current liabilities		(1.9	)

Total liabilities assumed		(4.1	)

Net assets acquired	$	23.8

Acquisition Of California Micro Devices Corporation [Member]

Business Acquisition [Line Items]

Schedule Of Purchase Price Allocation


Cash and cash equivalents	$	42.8
Receivables, net		5.0
Inventories		9.0
Other current assets		2.0
Property, plant and equipment		1.7
Goodwill		20.3
Intangible assets		21.7
In-process research and development		18.6
Other non-current assets		0.1

Total assets acquired		121.2

Accounts payable		(6.2	)
Other current liabilities		(1.6	)
Long-term accrued liabilities		(0.2	)

Total liabilities assumed		(8.0	)

Net assets acquired	$	113.2

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

Restructuring, Asset Impairments And Other, Net (Tables)

12 Months Ended

Dec. 31, 2011

Restructuring, Asset Impairments And Other, Net [Abstract]

Reconciliation Of "Restructuring, Asset Impairments And Other, Net" Caption On The Consolidated Statement Of Operations


	Restructuring			Asset Impairment		Other			Total
Year Ended December 31, 2011
Thailand facility closure	$	5.7		$	24.8	$	(18.6	)	$	11.9
Aizu facility closure		6.5			61.5		2.0			70.0
2011 SANYO acquisition		10.0			—		—			10.0
Japan earthquake and tsunami		—			—		4.8			4.8
Phoenix wafer manufacturing facility closure		4.3			—		—			4.3
2011 global workforce reduction		2.5			—		—			2.5
Lease termination adjustment		(1.3	)		—					(1.3	)
IPRD project write-off		—			—		0.5			0.5

Total	$	27.7		$	86.3	$	(11.3	)	$	102.7

Year Ended December 31, 2010
2010 acquisition of SDT	$	2.2		$	—	$	—		$	2.2
2010 acquisition of CMD		3.5			0.1		—			3.6
Cost basis investment write-off		—			—		3.9			3.9
Other		0.3			0.1		0.4			0.8

Total	$	6.0		$	0.2	$	4.3		$	10.5

Year Ended December 31, 2009
2009 global workforce reduction	$	12.6		$	0.4	$	—		$	13.0
Piestany, Slovakia facility closure		1.7			1.7		5.4			8.8
2009 Belgium workforce reduction		3.9			—		—			3.9
Gain on sale of intellectual property		—			—		(2.0	)		(2.0	)
Gain on settlement of two legal matters		—			—		(2.5	)		(2.5	)
Other		1.0			2.0		0.7			3.7

Total	$	19.2		$	4.1	$	1.6		$	24.9

Rollforward Of Accrued Restructuring Charges


	Balance as of December 31, 2010		Charges		Usage			Adjustments			Balance as of December 31, 2011
Estimated employee separation charges	$	1.4	$	25.8	$	(18.3	)	$	—		$	8.9

Estimated costs to exit	$	9.9	$	3.3	$	(3.3	)	$	(1.5	)	$	8.4

Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2011

Balance Sheet Information [Abstract]

Supplemental Balance Sheet Information


	December 31, 2011			December 31, 2010
Receivables, net:
Accounts receivable	$	464.3		$	301.9
Less: Allowance for doubtful accounts		(7.1	)		(7.3	)

	$	457.2		$	294.6

Inventories:
Raw materials	$	58.8		$	49.0
Work in process		430.8			210.9
Finished goods		147.8			100.9

	$	637.4		$	360.8

Other Current Assets:
Deposits	$	1.9		$	1.9
Prepaid Expenses		26.9			22.2
Tax Receivables		41.0			14.9
Other		51.8			24.6

	$	121.6		$	63.6

Property, plant and equipment, net:
Land	$	76.6		$	48.3
Buildings		539.3			484.4
Machinery and equipment		1,943.0			1,631.1

Total property, plant and equipment		2,558.9			2,163.8
Less: Accumulated depreciation		(1,449.4	)		(1,299.5	)

	$	1,109.5		$	864.3

Accrued expenses:
Accrued payroll	$	125.2		$	73.1
Sales related reserves		45.5			36.5
Restructuring reserves		17.3			11.3
Accrued pension liability		11.4			0.3
Other		40.4			41.4

	$	239.8		$	162.6

Accumulated other comprehensive loss:
Foreign currency translation adjustments	$	(46.5	)	$	(58.8	)
Unrecognized prior service cost of defined benefit pension plan		(0.2	)		(0.1	)
Prior service cost from pension legal plan amendment		—			(0.2	)

	$	(46.7	)	$	(59.1	)

Warranty Reserves


Balance as of December 31, 2008	$	3.9
Provision		0.4
Usage		(1.1	)

Balance as of December 31, 2009		3.2
Provision		0.9
Usage		(0.8	)

Balance as of December 31, 2010		3.3
Provision		4.0
Usage		(1.5	)

Balance as of December 31, 2011	$	5.8

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Long-Term Debt [Abstract]

Long-Term Debt


	December 31, 2011			December 31, 2010
Senior Revolving Credit Facility (up to $325.0 million)	$	—		$	—
Loan with a Japanese company due 2012 through 2018, interest payable quarterly at 2.33%		339.8			—
Zero Coupon Convertible Senior Subordinated Notes due 2024 (net of discount of $2.0 million and $8.7 million, respectively) (1)		94.2			87.5
1.875% Convertible Senior Subordinated Notes due 2025 (net of discount of $6.6 million and $12.8 million, respectively) (2)		88.4			82.2
2.625% Convertible Senior Subordinated Notes due 2026 (net of discount of $24.5 million and $73.9 million, respectively) (3)		207.9			410.1
2.625% Convertible Senior Subordinated Notes due 2026, Series B (net of discount of $22.0 million) (4)		176.6			—
Loan with Hong Kong bank, interest payable weekly at 2.04% and 2.03%, respectively		40.0			40.0
Loans with Philippine banks due 2012 through 2015, interest payable monthly and quarterly at an average rate of 2.01% and 1.80%, respectively		68.2			68.8
Loans with Chinese banks due 2013, interest payable quarterly at an average rate of 4.44% and 4.23%, respectively		7.0			34.0
Loans with Japanese banks due through 2013, interest payable monthly and semi-annually at an average rate of 1.71% and 1.45%, respectively		3.5			3.9
Loan with Singapore bank, interest payable weekly at 1.97%		25.0			—
Loan with British finance company, interest payable monthly at 2.42% and 2.18%, respectively		13.1			13.8
U.S. real estate mortgages payable monthly through 2016 at an average rate of 4.86%		31.6			33.0
U.S. equipment financing payable monthly through 2015 at 3.23%		10.8			—
Capital lease obligations		100.9			115.5

Long-term debt, including current maturities		1,207.0			888.8
Less: Current maturities		(370.1	)		(136.0	)

Long-term debt	$	836.9		$	752.8

(1)	The Zero Coupon Convertible Senior Subordinated Notes due 2024 may be put back to the Company at the option of the holders of the notes on April 15 of 2012, 2014 and 2019 or called at the option of the Company on or after April 15, 2012.

(2)	The 1.875% Convertible Senior Subordinated Notes due 2025 may be put back to the Company at the option of the holders of the notes on December 15 of 2012, 2015 and 2020 or called at the option of the Company on or after December 20, 2012.

(3)	The 2.625% Convertible Senior Subordinated Notes due 2026 may be put back to the Company at the option of the holders of the notes on December 15 of 2013, 2016 and 2021 or called at the option of the Company on or after December 20, 2013.

(4)	The 2.625% Convertible Senior Subordinated Notes due 2026, Series B may be put back to the Company at the option of the holders of the notes on December 15 of 2016 and 2021 or called at the option of the Company on or after December 20, 2016.

Annual Maturities Relating To Long-Term Debt


	Actual Maturities
2012		378.8
2013		329.4
2014		75.2
2015		63.4
2016		237.4
Thereafter		178.0

Total	$	1,262.2

Summary Of Foreign And Domestic Subsidiaries Debt Arrangements


Loan Agreement	Balance as of December 31, 2011		Secured By
U.S. Equipment Financing	$	10.8		Equipment
Philippines Loan		10.0		Unsecured
Philippines Loans		58.2		Equipment
Singapore Loan		25.0		Accounts Receivable
Chinese Loan		7.0		Unsecured
Japanese loans		3.5		Unsecured
U.S. Real Estate Mortgages		31.6		Real Estate
Loan with British Finance Company		13.1		Accounts Receivable
Loan with Hong Kong Bank		40.0		Accounts Receivable

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Income (Loss) Before Income Taxes And Minority Interests


	Year ended December 31,
	2011			2010			2009
United States	$	(143.9	)	$	(57.5	)	$	(28.3	)
Foreign		181.7			363.2			99.3

	$	37.8		$	305.7		$	71.0

Provision (Benefit) For Income Taxes


	Year ended December 31,
	2011			2010			2009
Current:
Federal	$	0.5		$	(0.3	)	$	(1.8	)
State and local		0.3			0.4			0.2
Foreign		25.0			8.4			7.8

		25.8			8.5			6.2

Deferred:
Federal		—			(1.2	)		1.2
Foreign		(2.9	)		5.5			0.3

		(2.9	)		4.3			1.5

	$	22.9		$	12.8		$	7.7

Reconciliation Of The U.S. Federal Statutory Income Tax Rate


	Year ended December 31,
	2011			2010			2009
U.S. federal statutory rate		35.0	%		35.0	%		35.0	%
Increase (decrease) resulting from:
State and local taxes, net of federal tax benefit		0.7			0.1			0.4
Foreign withholding taxes		0.1			—			3.3
Foreign rate differential		(588.0	)		(36.5	)		(39.6	)
Dividend income from foreign subsidiaries		146.1			15.3			89.1
Goodwill impairment		—			—			—
Gain on SANYO Semiconductor acquisition		(22.5	)		—			—
Research and development credit monetization		—			(0.1	)		(2.8	)
Change in valuation allowance		491.5			(8.0	)		(72.0	)
Tax reserves		0.8			(0.3	)		(7.5	)
Other		(3.1	)		(1.3	)		4.9

		60.6	%		4.2	%		10.8	%

Tax Effects Of Temporary Differences


	Year ended December 31,
	2011			2010
Net operating loss and tax credit carryforwards	$	1,056.5		$	424.1
Tax-deductible goodwill		40.6			65.3
Reserves and accruals		31.7			67.2
Property, plant and equipment		360.5			7.4
Inventories		101.3			14.0
Other		28.6			(19.7	)

Deferred tax assets and liabilities before valuation allowance	$	1,619.2		$	558.3

Valuation allowance		(1,626.1	)		(560.8	)

Net deferred tax asset (liability)	$	(6.9	)	$	(2.5	)

Activity For Unrecognized Gross Tax Benefits


	2011			2010			2009
Balance at beginning of year	$	13.4		$	17.0		$	19.4
Reserves acquired		1.3			—			2.7
Additions based on tax positions related to the current year		5.5			1.2			1.4
Additions for tax positions of prior years		0.8			0.5			1.0
Reductions for tax positions of prior years		(1.4	)		(0.3	)		(3.9	)
Lapse of statute		(1.0	)		(5.0	)		(3.6	)
Settlements		—			—			—

Currency adjustments		—			—			—

Balance at end of year	$	18.6		$	13.4		$	17.0

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References + Details

Earnings Per Share And Equity (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share And Equity [Abstract]

Income Per Share Calculations


	For the years ended December 31,
	2011		2010		2009
Net income applicable to ON Semiconductor Corporation	$	11.6	$	290.5	$	61.0

Basic weighted average common shares outstanding		446.7		431.0		420.8
Add: Incremental shares for:
Dilutive effect of stock options and awards		7.6		9.3		8.5
Dilutive effect of convertible notes		2.9		4.1		2.8

Diluted weighted average common shares outstanding		457.2		444.4		432.1

Net income per common share attributable to ON Semiconductor Corporation
Basic:	$	0.03	$	0.67	$	0.14
Basic:	$	0.03	$	0.67	$	0.14

Diluted:	$	0.03	$	0.65	$	0.14

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-Based Compensation [Abstract]

Summary Of Restricted Stock Units Transactions


	Year Ended December 31, 2011
	Number of Shares			Weighted-Average Grant Date Fair Value
Nonvested shares of restricted stock units at December 31, 2010		12.3		$	5.19
Granted		5.1			10.04
Released		(6.5	)		4.47
Forfeited		(1.3	)		7.41

Nonvested shares of restricted stock units at December 31, 2011		9.6		$	7.95

Weighted-Average Assumptions Of Employee Stock Options


	Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009
Volatility		52.1	%		46.8	%		54.9	%
Risk-free interest rate		1.2	%		1.7	%		2.4	%
Expected term		4.8 years			5.0 years			5.3 years

Weighted-Average Assumptions With Employee Stock Purchase Plan


Employee Stock Purchase Plan	Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009
Expected life (in years)		0.25			0.25			0.25
Risk-free interest rate		0.05	%		0.14	%		0.15	%
Volatility		39	%		39	%		83	%

Summary Of Share-Based Compensation Expense


	Year Ended December 31, 2011		Year Ended December 31, 2010		Year Ended December 31, 2009
Cost of revenues	$	6.3	$	14.1	$	13.7
Research and development		6.9		10.5		10.7
Selling and marketing		6.4		9.7		8.8
General and administrative		13.9		17.9		21.0
Restructuring		—		0.5		—

Share-based compensation expense before income taxes	$	33.5	$	52.7	$	54.2

Related income tax benefits (1)		—		—		—

Share-based compensation expense, net of taxes	$	33.5	$	52.7	$	54.2

(1)	Most of the Company's share-based compensation relates to its domestic subsidiaries, which have historically experienced recurring net operating losses; therefore, no related tax benefits are recorded.

Summary Of Stock Option Plans


	Year Ended December 31, 2011
	Number of Shares			Weighted-Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Outstanding at December 31, 2010		27.4		$	7.44
Granted		1.1			8.71
Exercised		(8.7	)		6.82
Canceled		(1.1	)		9.28
Outstanding at December 31, 2011		18.7		$	7.70		4.6	$	19.0

Exercisable at December 31, 2011		14.5			7.80		4.0	$	15.4

Additional Information On Stock Options Outstanding


	Exercisable				Unexercisable				Total
Exercise Prices	Number of Shares		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price
Less than $7.72		7.4	$	5.65		2.3	$	6.12		9.7	$	5.76
Above $7.72		7.1	$	10.03		1.9	$	8.80		9.0	$	9.77

Total Outstanding		14.5	$	7.80		4.2	$	7.33		18.7	$	7.70

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References + Details

Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Summary Of Net Periodic Pension Cost


	Year Ended December 31,
	2011			2010			2009
Service cost	$	9.4		$	3.8		$	4.0
Interest cost		5.2			3.1			3.6
Expected return on plan assets		(4.0	)		(2.8	)		(2.6	)
Amortization of prior service cost		2.6			1.1			(4.9	)
Curtailment loss		2.0			—			—
Other losses (gains)		(3.1	)		—			0.3

Total net periodic pension cost	$	12.1		$	5.2		$	0.4

Weighted average assumptions
Discount rate		3.50	%		4.65	%		5.61	%
Expected return on plan assets		4.07	%		4.75	%		5.16	%
Rate of compensation increase		4.66	%		3.87	%		4.06	%

Summary Of Status Of Foreign Pension Plans


	December 31,
	2011			2010
Change in projected benefit obligation
Projected benefit obligation at the beginning of the year	$	74.8		$	68.6
Benefit obligation incurred through acquisition		87.9			—
Service cost		9.4			3.8
Interest cost		5.2			3.1
Net actuarial (gain) or loss		(7.8	)		1.5
Benefits paid by plan assets		(3.2	)		(1.1	)
Curtailment		2.0			—
Plan amendments		2.6			—
Translation (gain) or loss and other		5.5			(1.1	)

Projected benefit obligation at the end of the year	$	176.4		$	74.8

Accumulated benefit obligation at the end of the year	$	134.7		$	56.3

Change in plan assets
Fair value of plan assets at the beginning of the year	$	65.9		$	65.8
Plan assets incurred through acquisition		35.7			—
Actual return on plan assets		(0.7	)		3.3
Benefits paid from plan assets		(3.2	)		(1.0	)
Employer contributions		5.8			1.4
Translation gain or (loss)		2.0			(3.6	)

Fair value of plan assets at the end of the year	$	105.5		$	65.9

Plans with underfunded or non-funded projected benefit obligation:
Aggregate accumulated benefit obligation	$	108.4		$	38.9
Aggregate fair value of plan assets	$	52.0		$	17.4
Plans with underfunded or non-funded accumulated benefit obligation:
Aggregate accumulated benefit obligation	$	102.2		$	24.7
Aggregate fair value of plan assets	$	49.8		$	7.7
Amounts recognized in the balance sheet of consist of:
Noncurrent assets	$	12.4		$	13.8
Current liabilities		(11.4	)		(0.2	)
Non-current liabilites		(71.9	)		(22.5	)

Funded status	$	(70.9	)	$	(8.9	)

Amounts recognized in accumulated other comprehensive income consist of:
Prior service cost	$	0.1		$	0.2

Weighted average assumptions at the end of the year
Discount rate		3.50	%		4.65	%
Rate of compensation increase		4.66	%		3.87	%

Fair Value Measurement Of Plan Assets


	December 31, 2011
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash/Money Markets	$	2.5	$	2.5	$	—	$	—
Foreign Government Securities (1)		56.1		51.5		4.6		—
Corporate Bonds, Debentures (2)		26.7		21.2		1.4		4.1
Equity Securities (3)		17.7		16.0		1.7		—
Mutual Funds		0.3		0.3		—		—
Real Estate Fund		0.1		—		0.1		—
Insurance Contracts (4)		2.1		—		1.1		1.0

	$	105.5	$	91.5	$	8.9	$	5.1


	December 31, 2010
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash/Money Markets	$	—	$	—	$	—	$	—
Foreign Government Securities		48.1		27.6		17.5		3.0
Agency Securities		1.5		—		1.5		—
Corporate Bonds, Debentures		10.8		3.2		4.1		3.5
Equity Securities		4.1		2.0		2.1		—
Mutual Funds		0.3		0.3		—		—
Real Estate Fund		0.1		—		0.1		—
Insurance Contracts		1.0		—		—		1.0

	$	65.9	$	33.1	$	25.3	$	7.5

(1)	This category includes investments in guaranteed returns securities.

(2)	This category includes investments in government bonds and corporate bonds of developed countries, emerging market government bonds, emerging market corporate bonds and convertible bonds, of which 54% of bond securities were invested in Japan.

(3)	This category includes investments in equity securities of developed countries and emerging markets, of which 53% were invested in Japan.

(4)	This category refers to investments with insurance companies' General Account. The General Account guarantees a minimum rate of return to the investment.

Activity Of Plan Assets With Fair Value Measurement Using Significant Unobservable Inputs


	Foreign Government Securities			Corporate Bonds, Debentures		Insurance			Total
Balance at December 31, 2009	$	2.4		$	2.6	$	1.0		$	6.0
Actual return on plan assets:
Relating assets still held at the reporting date		—			0.2		0.2			0.4
Relating assets sold during the period		—			—		—			—
Purchases, sales and settlements		0.6			0.7		(0.2	)		1.1
Transfers in and/or out of Level 3		—			—		—			—

Balance at December 31, 2010		3.0			3.5		1.0			7.5

Actual return on plan assets:
Relating assets still held at the reporting date		—			—		—			—
Relating assets sold during the period		—			—		—			—
Purchases, sales and settlements		—			—		—			—
Transfers in and/or out of Level 3		(3.0	)		0.6		—			(2.4	)

Balance at December 31, 2011	$	—		$	4.1	$	1.0		$	5.1

Expected Benefit Payments

2012	$	15.3
2013		3.6
2014		3.6
2015		4.0
2016		4.0
5 years thereafter		—

Total	$	30.5

- Definition

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4, 7, 16, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=6930749&loc=d3e4179-114921

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2410-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2439-114920

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Financial Instruments [Abstract]

Schedule Of Net Foreign Exchange Positions


	December 31,
	2011 Buy (Sell)			2011 Notional Amount		2010 Buy (Sell)			2010 Notional Amount
Canadian Dollar	$	(1.4	)	$	1.4	$	—		$	—
Chinese Renminbi		(12.8	)		12.8		(5.4	)		5.4
Czech Koruna		6.8			6.8		7.8			7.8
Euro		(30.8	)		30.8		(19.2	)		19.2
Indian Rupee		(2.8	)		2.8		—			—
Japanese Yen		(100.0	)		100.0		4.6			4.6
Korean Won		1.0			1.0		1.8			1.8
Malaysian Ringgit		29.4			29.4		26.1			26.1
Philippine Peso		5.1			5.1		7.3			7.3
Singapore Dollar		2.7			2.7		3.3			3.3
Thai Bhat		3.4			3.4		—			—
Taiwan Dollar		(7.2	)		7.2		—			—

	$	(106.6	)	$	203.4	$	26.3		$	75.5

Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Fair Value Of Assets And Liabilities Measured On Recurring Basis


Description	Balance as of December 31, 2011		Quoted Prices in Active Markets (Level 1)		Balance as of December 31, 2010		Quoted Prices in Active Markets (Level 1)
Assets:
Cash and cash equivalents:
Demand and time deposits	$	455.3	$	455.3	$	309.4	$	309.4
Money market funds		—		—		46.1		46.1
Treasuries		131.1		131.1		267.8		267.8
Commercial paper		50.9		50.9		—		—
Corporate bonds		15.6		15.1		—		—
Other Current Assets
Foreign currency exchange contracts	$	0.7	$	0.7	$	1.1	$	1.1

Liabilities:
Foreign currency exchange contracts	$	0.1	$	0.1	$	0.6	$	0.6

Carrying Amounts And Fair Values Of Long-Term Borrowings


	December 31, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt, including current portion
Convertible Notes	$	567.1	$	683.9	$	579.7	$	818.0
Long-term debt	$	496.6	$	462.0	$	160.7	$	155.1

Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments And Contingencies [Abstract]

Operating Leases Future Minimum Payments Receivable


Year Ending December 31,
2012	$	22.0
2013		17.1
2014		14.1
2015		11.7
2016		12.6
Thereafter		16.4

Total	$	93.9

Supplemental Disclosure Of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Disclosure Of Cash Flow Information [Abstract]

Non-Cash Financing Activities And Cash Payments


	Year ended December 31,
	2011			2010			2009
Non-cash investing activities:
Common stock issued for debt repurchase	$	—		$	—		$	28.5
Non-cash financing activities:
Capital expenditures in accounts payable	$	58.8		$	69.2		$	21.4
Equipment acquired or refinanced through capital leases		24.9			69.2			6.6
Cash (received) paid for:
Interest income	$	(1.1	)	$	(0.5	)	$	(0.8	)
Interest expense		31.8			23.6			26.7
Income taxes		20.4			10.6			8.5

Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Segment Information Of Revenues, Gross Profit And Operating Income


	Computing & Consumer Products Group		Automotive, Industrial, Medical and Mil-Aero Products Group		Standard Products Group		SANYO Semiconductor Products Group			Total
For year ended December 31, 2011:
Revenues from external customers	$	609.1	$	894.7	$	878.2	$	1,060.3		$	3,442.3
Segment gross profit	$	238.3	$	450.9	$	295.5	$	79.1		$	1,063.8
Segment operating income (loss)	$	103.0	$	165.5	$	176.9	$	(159.4	)	$	286.0

For year ended December 31, 2010:
Revenues from external customers	$	609.1	$	794.7	$	909.6	$	—		$	2,313.4
Segment gross profit	$	257.4	$	415.3	$	339.1	$	—		$	1,011.8
Segment operating income	$	122.7	$	154.2	$	221.2	$	—		$	498.1

For year ended December 31, 2009:
Revenues from external customers	$	473.0	$	623.8	$	672.1	$	—		$	1,768.9
Segment gross profit	$	158.7	$	292.0	$	205.2	$	—		$	655.9
Segment operating income	$	45.0	$	67.2	$	114.6	$	—		$	226.8

Reconciliation Of Operating Profit (Loss) From Segments To Consolidated


	Year Ended
	December 31, 2011			December 31, 2010			December 31, 2009
Gross profit for reportable segments	$	1,063.8		$	1,011.8		$	655.9
Unallocated amounts:
Other unallocated manufacturing costs	$	(55.0	)	$	(55.8	)	$	(35.2	)

Gross profit	$	1,008.8		$	956.0		$	620.7

Operating income for reportable segments	$	286.0		$	498.1		$	226.8
Unallocated amounts:
Restructuring and other charges		(102.7	)		(10.5	)		(24.9	)
Goodwill and intangible impairment		—			(16.1	)		—
Other unallocated manufacturing costs		(55.0	)		(55.8	)		(35.2	)
Other unallocated operating expenses		(14.9	)		(41.5	)		(24.1	)

Operating income	$	113.4		$	374.2		$	142.6

Revenues By Geographic Location Including Local Sales And Exports


	Year Ended
	December 31, 2011		December 31, 2010		December 31, 2009
United States	$	524.0	$	483.2	$	374.2
Other Americas		36.6		12.3		5.4
United Kingdom		424.7		373.0		258.2
Belgium		3.7		0.7		29.5
China		1,053.8		762.4		565.4
Japan		494.8		59.5		51.7
Singapore		683.3		540.8		387.3
Other Asia/Pacific		221.4		81.5		97.2

	$	3,442.3	$	2,313.4	$	1,768.9

Summary Of Property, Plant And Equipment By Geographic Location


	December 31, 2011		December 31, 2010
United States	$	257.5	$	223.7
China		96.7		97.0
Europe		117.9		104.6
Malaysia		164.5		137.4
Other Asia/Pacific		260.2		178.3
Japan		130.2		70.8
Belgium		70.0		47.8
Other Americas		12.5		4.7

	$	1,109.5	$	864.3

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Guarantor and Non-Guarantor Statements (Tables)

12 Months Ended

Dec. 31, 2011

Notes To Consolidated Statement Of Balance Sheet


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2011
Cash and cash equivalents	$	—			304.5			(0.2	)	$	348.6			—		$	652.9
Short-term investments		—			248.6			—			—			—			248.6
Receivables, net		—			64.7			—			392.5			—			457.2
Inventories		—			36.2			—			599.3			1.9			637.4
Other current assets		—			7.5			—			114.1			—			121.6
Deferred income taxes, net of allowances		—			5.5			—			4.5			—			10.0

Total current assets		—			667.0			(0.2	)		1,459.0			1.9			2,127.7
Property, plant and equipment, net		—			255.2			2.3			854.5			(2.5	)		1,109.5
Deferred income taxes, net of allowances		—			—			—			34.2			—			34.2
Goodwill		—			125.7			37.3			35.7			—			198.7
Intangible assets, net		—			152.3						215.0			(30.1	)		337.2
Investments and other assets		2,036.2			1,303.5			59.1			846.9			(4,169.5	)		76.2

Total assets	$	2,036.2		$	2,503.7		$	98.5		$	3,445.3		$	(4,200.2	)	$	3,883.5

Accounts payable	$	—		$	32.8			0.1			418.9			—		$	451.8
Accrued expenses		—			61.0			0.8			176.3			1.7			239.8
Income taxes payable		—			(0.1	)		—			7.6			—			7.5
Accrued interest		0.6			—			—			0.1			—			0.7
Deferred income on sales to distributors		—			43.7			—			128.3			—			172.0
Deferred income taxes, net of allowances		—			—			—			33.6			—			33.6
Current portion of long-term debt		182.6			74.1			—			113.4			—			370.1

Total current liabilities		183.2			211.5			0.9			878.2			1.7			1,275.5
Long-term debt		384.5			393.8			—			58.6			—			836.9
Other long-term liabilities		—			26.6			0.4			233.1			—			260.1
Deferred income tax, net of allowances		—			5.5			—			12.0			—			17.5
Intercompany		0.3			(318.2	)		(54.5	)		166.9			205.5			—

Total liabilities		568.0			319.2			(53.2	)		1,348.8			207.2			2,390.0
Common stock		5.0			0.3			50.9			146.9			(198.1	)		5.0
Additional paid-in capital		3,113.5			2,711.2			238.4			1,359.2			(4,308.8	)		3,113.5
Accumulated other comprehensive loss		(46.7	)		(46.7	)		—			(39.2	)		85.9			(46.7	)
Accumulated deficit		(1,202.3	)		(480.3	)		(137.6	)		629.6			(11.7	)		(1,202.3	)
Less: treasury stock, at cost		(401.3	)		—			—			—			—			(401.3	)

Total ON Semiconductor Corporation stockholders' equity (deficit)		1,468.2			2,184.5			151.7			2,096.5			(4,432.7	)		1,468.2
Minority interests in consolidated subsidiaries		—			—			—			—			25.3			25.3

Total equity		1,468.2			2,184.5			151.7			2,096.5			(4,407.4	)		1,493.5

Total liabilities and equity	$	2,036.2		$	2,503.7		$	98.5		$	3,445.3		$	(4,200.2	)	$	3,883.5


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2010
Cash and cash equivalents	$	—		$	392.3		$	—		$	231.0		$	—		$	623.3
Receivables, net		—			47.4			—			247.2			—			294.6
Inventories		—			48.0			—			299.9			12.9			360.8
Other current assets		—			14.9			—			48.7			—			63.6
Deferred income taxes, net of allowances		—			5.6			—			10.1			—			15.7

Total current assets		—			508.2			—			836.9			12.9			1,358.0
Restricted Cash		—			142.1			—			—			—			142.1
Property, plant and equipment, net		—			221.0			2.6			644.1			(3.4	)		864.3
Goodwill		—			125.7			37.2			28.3			—			191.2
Intangible assets, net		—			165.4			—			172.0			(34.4	)		303.0
Investments and other assets		1,946.6			1,131.2			51.4			830.0			(3,898.6	)		60.6

Total assets	$	1,946.6		$	2,293.6		$	91.2		$	2,511.3		$	(3,923.5	)	$	2,919.2

Accounts payable	$	—		$	43.4		$	0.1		$	213.4		$	—		$	256.9
Accrued expenses		—			82.1			0.8			78.0			1.7			162.6
Income taxes payable		—			0.9			—			4.2			—			5.1
Accrued interest		0.6			—			—			0.2			—			0.8
Deferred income on sales to distributors		—			33.7			—			115.8			—			149.5
Current portion of long-term debt		—			33.0			—			103.0			—			136.0

Total current liabilities		0.6			193.1			0.9			514.6			1.7			710.9
Long-term debt		579.7			103.0			—			70.1			—			752.8
Other long-term liabilities		—			21.1			0.4			27.8			—			49.3
Deferred income taxes, net of allowances		—			5.6			—			12.6			—			18.2
Intercompany		0.3			(123.8	)		(53.4	)		(28.6	)		205.5			—

Total liabilities		580.6			199.0			(52.1	)		596.5			207.2			1,531.2
Common stock		4.9			0.3			50.9			146.9			(198.1	)		4.9
Additional paid-in capital		3,016.1			2,502.2			178.5			1,110.7			(3,791.4	)		3,016.1
Accumulated other comprehensive loss		(59.1	)		(59.1	)		—			(52.3	)		111.4			(59.1	)
Accumulated deficit		(1,213.9	)		(348.8	)		(86.1	)		709.5			(274.6	)		(1,213.9	)
Less: treasury stock, at cost		(382.0	)		—			—			—			—			(382.0	)

Total ON Semiconductor Corporation stockholders' equity (deficit)		1,366.0			2,094.6			143.3			1,914.8			(4,152.7	)		1,366.0
Minority interests in consolidated subsidiaries		—			—			—			—			22.0			22.0

Total equity		1,366.0			2,094.6			143.3			1,914.8			(4,130.7	)		1,388.0

Total liabilities and equity	$	1,946.6		$	2,293.6		$	91.2		$	2,511.3		$	(3,923.5	)	$	2,919.2

Notes To Consolidated Statement Of Operations And Cash Flow


	Issuer			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2011
Revenues	$	—		$	788.9		$	13.9		$	3,985.7		$	(1,346.2	)	$	3,442.3
Cost of product revenues		—			531.5			0.8			3,236.4			(1,335.2	)		2,433.5

Gross profit		—			257.4			13.1			749.3			(11.0	)		1,008.8

Research and development		—			167.6			10.7			184.2			—			362.5
Selling and marketing		—			70.4			1.0			123.7			—			195.1
General and administrative		—			84.0			0.7			107.7			—			192.4
Amortization of acquisition related intangible assets		—			18.0			—			28.8			(4.1	)		42.7
Restructuring, asset impairments and other, net		—			3.4			—			99.3			—			102.7

Total operating expenses		—			343.4			12.4			543.7			(4.1	)		895.4

Operating income (loss)		—			(86.0	)		0.7			205.6			(6.9	)		113.4
Interest expense		(50.8	)		(8.5	)		—			(9.6	)		—			(68.9	)
Interest income		—			0.4			—			0.7			—			1.1
Other		—			(3.1	)		—			(5.8	)		—			(8.9	)
Loss on debt repurchase and exchange		(23.2	)		—			—			—			—			(23.2	)
Gain (loss) on SANYO Semiconductor acquisition		(0.1	)		24.4			—			—			—			24.3
Equity in earnings		85.7			151.6			7.7			—			(245.0	)		—

Income (loss) before income taxes		11.6			78.8			8.4			190.9			(251.9	)		37.8
Income tax provision					1.5						(24.4	)					(22.9	)

Net income (loss)		11.6			80.3			8.4			166.5			(251.9	)		14.9
Net income (loss) attributable to minority interest		—			—			—			—			(3.3	)		(3.3	)

Net income (loss) attributable to ON Semiconductor Corporation	$	11.6		$	80.3		$	8.4		$	166.5		$	(255.2	)	$	11.6

Net cash provided by operating activities				$	221.1		$	—		$	324.4					$	545.5

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(69.0	)		(0.2	)		(247.2	)		—			(316.4	)
Purchase of a business, net of cash acquired		—			24.3			—			(42.2	)		—			(17.9	)
Recovery from insurance on property, plant and equipment											13.3						13.3
Proceeds from sale of property, plant and equipment		—			0.1			—			3.2			—			3.3
Deposits utilized for purchases of property, plant and equipment		—			—			—			0.5			—			0.5
Proceeds from held-to-maturity securities		—			122.2			—			—			—			122.2
Purchase of held-to-maturity securities		—			(370.8	)		—			—			—			(370.8	)
Change in restricted cash		—			142.1			—			—			—			142.1

Net cash used in investing activities		—			(151.1	)		(0.2	)		(272.4	)		—			(423.7	)

Cash flows from financing activities:
Intercompany loans		—			(289.3	)		—			289.3			—			—
Intercompany loan repayments		—			182.2			—			(182.2	)		—			—
Proceeds from debt issuance		—			12.2			—			56.8			—			69.0
Proceeds from issuance of common stock under employee stock purchase plan		—			8.1			—			—			—			8.1
Proceeds from exercise of stock options		—			59.4			—									59.4
Purchase of Treasury Stock		—			(19.3	)		—			—			—			(19.3	)
Payment of capital lease obligation		—			(36.4	)		—			(2.6	)					(39.0	)
Repurchase of 2.625% Convertible Senior Subordinated Notes due 2026		—			(56.2	)		—			—			—			(56.2	)
Payment made in connection with exchange of 2.625% convertible senior subordinated notes due 2026		—			(15.9	)		—			—			—			(15.9	)
Repayment of long term debt		—			(2.6	)		—			(100.7	)		—			(103.3	)

Net cash used in financing activities		—			(157.8	)		—			60.6			—			(97.2	)

Effect of exchange rate changes on cash and cash equivalents											5.0						5.0

Net increase (decrease) in cash and cash equivalents		—			(87.8	)		(0.2	)		117.6			—			29.6
Cash and cash equivalents, beginning of period		—			392.3			—			231.0						623.3

Cash and cash equivalents, end of period	$	—		$	304.5		$	(0.2	)	$	348.6		$	—		$	652.9


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2010
Revenues	$	—		$	632.4		$	14.0		$	2,850.7		$	(1,183.7	)	$	2,313.4
Cost of product revenues		—			495.4			1.8			2,051.6			(1,191.4	)		1,357.4

Gross profit		—			137.0			12.2			799.1			7.7			956.0

Research and development		—			12.1			9.8			226.1			—			248.0
Selling and marketing		—			67.7			0.9			77.0			—			145.6
General and administrative		—			19.5			0.8			109.6			—			129.9
Amortization of acquisition related intangible assets		—			17.1			—			18.8			(4.2	)		31.7
Goodwill and intangible asset impairment		—			—			—			16.1			—			16.1
Restructuring, asset impairments and other, net		—			7.1			—			3.4			—			10.5

Total operating expenses		—			123.5			11.5			451.0			(4.2	)		581.8

Operating income (loss)		—			13.5			0.7			348.1			11.9			374.2
Interest expense		(50.8	)		(6.6	)		—			(4.0	)		—			(61.4	)
Interest income		—			0.2			—			0.3			—			0.5
Other		—			3.2			—			(10.1	)		—			(6.9	)
Loss on debt repurchase		0.1			(0.8	)		—			—			—			(0.7	)
Equity in earnings		341.2			735.3			5.5			—			(1,082.0	)		—

Income (loss) before income taxes		290.5			744.8			6.2			334.3			(1,070.1	)		305.7
Income tax provision		—			3.7			—			(16.5	)		—			(12.8	)

Net income (loss)		290.5			748.5			6.2			317.8			(1,070.1	)		292.9
Net income (loss) attributable to minority interest		—			—			—			—			(2.4	)		(2.4	)

Net income (loss) attributable to ON Semiconductor Corporation	$	290.5		$	748.5		$	6.2		$	317.8		$	(1,072.5	)	$	290.5

Net cash provided by operating activities	$	—		$	419.9		$	0.2		$	131.7		$	—		$	551.8

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(59.6	)		(0.2	)		(129.1	)		—			(188.9	)
Purchase of a business, net of cash acquired		—			—			—			(91.0	)		—			(91.0	)
Proceeds from sale of property, plant and equipment		—			37.1			—			—			—			37.1
Deposits utilized for purchases of property, plant and equipment		—			—			—			(2.2	)		—			(2.2	)
Change in restricted cash		—			(142.1	)		—			5.9			—			(136.2	)
Proceeds from held-to-maturity securities		—			—			—			45.5			—			45.5

Net cash used in investing activities		—			(164.6	)		(0.2	)		(170.9	)		—			(335.7	)

Cash flows from financing activities:
Intercompany loans		—			(666.9	)		—			666.9			—			—
Intercompany loan repayments		—			672.7			—			(672.7	)		—			—
Proceeds from issuance of common stock under the employee stock purchase plan		—			7.0			—			—			—			7.0
Proceeds from debt issuance		—			33.0			—			119.0			—			152.0
Proceeds from exercise of stock options		—			23.3			—			—			—			23.3
Payment of capital lease obligation		—			(29.8	)		—			(2.5	)		—			(32.3	)
Purchase of treasury stock		—			(15.0	)		—			—			—			(15.0	)
Repayment of long term debt		—			(173.3	)					(81.1	)		—			(254.4	)

Net cash used in financing activities		—			(149.0	)		—			29.6			—			(119.4	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—			0.9			—			0.9

Net increase (decrease) in cash and cash equivalents		—			106.3			—			(8.7	)		—			97.6
Cash and cash equivalents, beginning of period		—			286.0			—			239.7			—			525.7

Cash and cash equivalents, end of period	$	—		$	392.3		$	—		$	231.0		$	—		$	623.3


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
For the year ended December 31, 2009
Revenues	$	—		$	512.5		$	12.1	$	2,291.5		$	(1,047.2	)	$	1,768.9
Cost of product revenues		—			399.1			1.7		1,794.1			(1,046.7	)		1,148.2

Gross profit		—			113.4			10.4		497.4			(0.5	)		620.7

Research and development		—			40.8			8.1		150.0			(0.1	)		198.8
Selling and marketing		—			48.0			0.8		72.1			—			120.9
General and administrative		—			(49.2	)		0.6		110.7			42.4			104.5
Amortization of acquisition related intangible assets		—			12.5			—		19.4			(2.9	)		29.0
Restructuring, asset impairments and other, net		—			3.3			—		21.6			—			24.9

Total operating expenses		—			55.4			9.5		373.8			39.4			478.1

Operating income (loss)		—			58.0			0.9		123.6			(39.9	)		142.6
Interest expense		(52.2	)		(6.5	)		—		(5.9	)		—			(64.6	)
Interest income		—			0.4			—		0.3			0.1			0.8
Other		—			(1.4	)		—		(3.3	)		—			(4.7	)
Loss on debt repurchase		(3.1	)		—			—		—			—			(3.1	)
Gain (loss) on acquisition		—			—			—		—			—			—
Equity in earnings		116.3			72.4			5.4		119.4			(313.5	)		—

Income (loss) before income taxes		61.0			122.9			6.3		234.1			(353.3	)		71.0
Income tax provision		—			5.2			—		(12.9	)		—			(7.7	)

Net income (loss)		61.0			128.1			6.3		221.2			(353.3	)		63.3
Net income (loss) attributable to minority interest		—			—			—		—			(2.3	)		(2.3	)

Net income (loss) attributable to ON Semiconductor Corporation	$	61.0		$	128.1		$	6.3	$	221.2		$	(355.6	)	$	61.0

Net cash provided by operating activities	$	—		$	(217.3	)	$	—	$	496.6		$	—		$	279.3

Cash flows from investing activities:
Purchases of property, plant and equipment		—			(9.4	)		—		(45.9	)		—			(55.3	)
Purchase of a business, net of cash acquired		—			—			—		(16.7	)		—			(16.7	)
Deposits utilized for purchases of property, plant and equipment		—			—			—		0.3			—			0.3
Proceeds from sales of property, plant and equipment		—			—			—		(3.2	)		—			(3.2	)
Proceeds from held-to-maturity securities		—			—			—		52.4			—			52.4
Purchase of held-to-maturity securities		—			—			—		(97.9	)		—			(97.9	)
Change in restricted cash		—			—			—		(5.9	)		—			(5.9	)

Net cash used in investing activities		—			(9.4	)		—		(116.9	)		—			(126.3	)

Cash flows from financing activities:
Intercompany loans		—			(123.6	)		—		123.6			—			—
Intercompany loan repayments		—			501.5			—		(501.5	)		—			—
Proceeds from issuance of common stock under the employee stock purchase plan		—			5.5			—		—			—			5.5
Proceeds from debt issuance		—			—			—		79.5			—			79.5
Proceeds from exercise of stock options		—			17.5			—		—			—			17.5
Purchase of Treasury Stock		—			(8.6	)		—		—			—			(8.6	)
Payment of capital lease obligation		—			(23.4	)		—		(6.1	)		—			(29.5	)
Repayment of long term debt		—			(69.6	)		—		(81.0	)		—			(150.6	)

Net cash used in financing activities		—			299.3			—		(385.5	)		—			(86.2	)

Effect of exchange rate changes on cash and cash equivalents		—			—			—		0.2			—			0.2

Net increase (decrease) in cash and cash equivalents		—			72.6			—		(5.6	)		—			67.0
Cash and cash equivalents, beginning of period		—			213.4			—		245.3			—			458.7

Cash and cash equivalents, end of period	$	—		$	286.0		$	—	$	239.7		$	—		$	525.7

(1)	ON Semiconductor is a holding Company and has no operations apart from those of its operating subsidiaries. Additionally, ON Semiconductor does not maintain a bank account; rather SCI LLC, its primary domestic operating subsidiary, processes all of its cash receipts and disbursements on its behalf.

Other Subsidiaries [Member]

Notes To Consolidated Statement Of Operations And Cash Flow

GuarantorSubsidiaries

Significant Accounting Policies (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($) days years	Feb. 27, 2011	Dec. 31, 2010 USD ($)	Jun. 09, 2010	Jan. 27, 2010
Significant Accounting Policies [Line Items]
Percentage of voting stock	20.00%
Restricted cash \| $			$ 142.1
Intangible assets, economic useful lives, maximum (in years)	18
Capitalized debt issuance costs \| $	$ 6.2		$ 7.0
Repayment period of distributor \| days	30
Period of standard warranty from the date of shipment	3
Repayment period of account receivable after the date of shipment entitling cash discount \| days	10
Buildings [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (in years)	30
Estimated useful lives of property, plant and equipment, maximum (in years)	50
Machinery And Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property, plant and equipment, minimum (in years)	3
Estimated useful lives of property, plant and equipment, maximum (in years)	20
Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]
Significant Accounting Policies [Line Items]
Percentage of voting stock		100.00%
Acquisition Of California Micro Devices Corporation [Member]
Significant Accounting Policies [Line Items]
Percentage of voting stock					100.00%
Acquisition Of Sound Design Technologies LTD [Member]
Significant Accounting Policies [Line Items]
Percentage of voting stock				100.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Useful life, minimum (in years)	1

Significant Accounting Policies (Short-Term Investments Classified As Held-To-Maturity) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Carried at Amortized Cost	$ 248.6
Unrealized Gain/(Loss)	(0.2)
Fair Value	248.4
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Carried at Amortized Cost	101.0
Unrealized Gain/(Loss)	(0.1)
Fair Value	100.9
Corporate Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Carried at Amortized Cost	128.6
Unrealized Gain/(Loss)	(0.1)
Fair Value	128.5
Government Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Carried at Amortized Cost	19.0
Fair Value	$ 19.0

- Definition

This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities within one year of the balance sheet date or the normal operating cycle, whichever is longer; such investments are measured at amortized cost (carrying value). The held-to-maturity category is for those securities that the Entity has the positive intent and ability to hold until maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section A
-Paragraph 4
-Chapter 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill And Intangible Assets (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($) years	Dec. 31, 2010 USD ($) years	Dec. 31, 2009 USD ($) years
Goodwill And Intangible Assets [Line Items]
Goodwill impairment charge for digital and mixed signal group	$ 8.9
Projected net cash flows period \| years	5	5	5
Discount rate	14.00%	13.00%	11.20%
Long-term growth rate	3.90%	3.90%	3.50%
Amortization expense	$ 43.8	$ 34.1	$ 31.3
Cost of goods sold, amortization	$ 1.1	2.4	$ 2.3
Number of projects amortized	13
Amortized amount of projects	$ 508.1	430.1
Developed Technology Originally Classified As In- Process Research And Development [Member]
Goodwill And Intangible Assets [Line Items]
Amortized amount of projects	$ 32.8
Useful life, minimum (in years) \| years	8.6
In-Process Research And Development [Member]
Goodwill And Intangible Assets [Line Items]
Amortized amount of projects	$ 3.1	$ 18.3
In-process research and development	$ 0.6

Goodwill And Intangible Assets (Summary Of Goodwill By Operating Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Original Goodwill	$ 623.4	$ 615.9
Accumulated Amortization	(9.8)	(9.8)
Accumulated Impairment Losses	(414.9)	(414.9)
Carrying Value	198.7	191.2
Automotive, Industrial, Medical And Mil-Aero [Member]
Goodwill [Line Items]
Original Goodwill	556.6	549.1
Accumulated Amortization	(4.2)	(4.2)
Accumulated Impairment Losses	(406.0)	(406.0)
Carrying Value	146.4	138.9
Computing & Consumer Products [Member]
Goodwill [Line Items]
Original Goodwill	29.1	29.1
Accumulated Amortization	(5.6)	(5.6)
Carrying Value	23.5	23.5
Standard Products [Member]
Goodwill [Line Items]
Original Goodwill	37.7	37.7
Accumulated Impairment Losses	(8.9)	(8.9)
Carrying Value	$ 28.8	$ 28.8

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill And Intangible Assets (Summary Of Change In Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($)
Goodwill And Intangible Assets [Abstract]
Net balance as of December 31, 2010	$ 191.2
Additions due to business combination	7.5
Net balance as of December 31, 2011	$ 198.7

- Definition

+ References

+ Details

Goodwill And Intangible Assets (Summary Of Intangible Assets, Net) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($) years	Dec. 31, 2010 USD ($) years
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 508.1	$ 430.1
Accumulated Amortization	(136.7)	(92.7)
Foreign Currency Translation Adjustment	(26.5)	(27.2)
Impairment	(7.7)	(7.2)
Carrying Value	$ 337.2	303.0
Useful Life, Maximum (in Years) \| years	18
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 13.9	13.9
Accumulated Amortization	(8.0)	(7.0)
Carrying Value	$ 5.9	$ 6.9
Useful life, minimum (in years)	5	5
Useful Life, Maximum (in Years)	12	12
Assembled Workforce [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 6.7	$ 6.7
Accumulated Amortization	$ (6.7)	(6.1)
Carrying Value		$ 0.6
Useful Life (in Years) \| years	5	5
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 280.3	$ 250.5
Accumulated Amortization	(71.9)	(51.2)
Foreign Currency Translation Adjustment	(26.5)	(27.2)
Impairment	(3.2)	(3.2)
Carrying Value	$ 178.7	$ 168.9
Useful life, minimum (in years)	5	5
Useful Life, Maximum (in Years)	18	18
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 43.7	$ 16.7
Accumulated Amortization	(10.4)	(4.2)
Carrying Value	$ 33.3	$ 12.5
Useful Life (in Years) \| years	12	12
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 145.6	$ 113.0
Accumulated Amortization	(35.5)	(22.5)
Impairment	(2.0)	(2.0)
Carrying Value	$ 108.1	$ 88.5
Useful life, minimum (in years)	5	5
Useful Life, Maximum (in Years)	12	12
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 14.0	$ 11.0
Accumulated Amortization	(3.4)	(1.7)
Carrying Value	$ 10.6	$ 9.3
Useful Life (in Years) \| years	15	15
In-Process Research And Development [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	$ 3.1	$ 18.3
Impairment	(2.5)	(2.0)
Carrying Value	0.6	$ 16.3
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Original Cost	0.8
Accumulated Amortization	$ (0.8)
Useful Life (in Years) \| years	0.3

Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($)
Goodwill And Intangible Assets [Abstract]
2012	$ 44.3
2013	39.6
2014	38.4
2015	37.3
2016	34.4
Thereafter	142.6
Total estimated amortization expense	$ 336.6

Acquisitions (Acquisition Of SANYO Semiconductor Co., Ltd.) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Jul. 01, 2011 USD ($)	Apr. 01, 2011 USD ($)	Dec. 31, 2011 USD ($) years months
Business Acquisition [Line Items]
Gain on purchase of business			$ 24.3
Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Gain on purchase of business		$ 24.3
Business acquisition paid in cash			142.1
Business acquisition price note payable			377.5
Cash acquired from acquisition	$ 39.7
Gain on acquisition			24.3
Acquired intangible assets			$ 55.7
Initial purchase accounting estimates relating to funding adjustments for working capital		19.0
Weighted-average useful life, years \| years			8.8
Defined benefit pension plan, liabilities			$ 50.9
Patents [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets			$ 27.0
Weighted-average useful life, years \| years			5.5
Trademarks [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets			$ 3.0
Weighted-average useful life, years \| years			3.0
Customer Relationships [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets			$ 25.7
Weighted-average useful life, years \| years			13
Initial Estimate [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Gain on purchase of business		$ 61.3	$ 61.3
Total business acquisition cost			500.6
Acquired intangible assets			55.7
Estimated fair value of favorable supply arrangement included in other current assets			119.2
Total [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Gain on purchase of business			24.3
Total business acquisition cost			479.9
Acquired intangible assets			55.7
Estimated fair value of favorable supply arrangement included in other current assets			119.2
Estimated Fair Value Of Favorable Supply Arrangement [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Estimated fair value of favorable supply arrangement included in other current assets			80.0
Amortization resulting from foreign currency exchange rate			$ 80.4
Estimated benefit period for assets charged to cost of goods sold, months \| months			5
Withdrawal From Multiemployer Defined Benefit Plan [Member] \| Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Defined benefit pension plan, liabilities			$ 144.9

Acquisitions (Schedule Of Purchase Price Allocation) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Apr. 01, 2011	Dec. 31, 2011
Business Acquisition [Line Items]
Gain on acquisition		$ (24.3)
Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Business Acquisition [Line Items]
Intangible assets		55.7
Gain on acquisition	$ (24.3)
Acquisition Of SANYO Semiconductor Co., Ltd. [Member] \| Initial Estimate [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		117.1
Receivables, net		242.1
Inventories		423.9
Deferred income taxes current		0.5
Other current assets		119.2
Property, plant and equipment		148.0
Deferred income taxes, non-current		60.5
Intangible assets		55.7
Other non-current assets		14.9
Total assets acquired		1,181.9
Accounts payable		(300.0)
Deferred income taxes, current		(70.3)
Other current liabilities		(61.3)
Deferred income taxes, non-current		(0.5)
Long-term accrued liabilities		(187.9)
Total liabilities assumed		(620.0)
Net assets acquired		561.9
Gain on acquisition	$ (61.3)	(61.3)
Purchase price		500.6
Acquisition Of SANYO Semiconductor Co., Ltd. [Member] \| Adjustments [Member]
Business Acquisition [Line Items]
Inventories		(23.6)
Property, plant and equipment		(1.3)
Total assets acquired		(24.9)
Deferred income taxes, current		1.5
Other current liabilities		(21.9)
Long-term accrued liabilities		(12.4)
Total liabilities assumed		(32.8)
Net assets acquired		(57.7)
Gain on acquisition		37.0
Purchase price		(20.7)
Acquisition Of SANYO Semiconductor Co., Ltd. [Member] \| Total [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		117.1
Receivables, net		242.1
Inventories		400.3
Deferred income taxes current		0.5
Other current assets		119.2
Property, plant and equipment		146.7
Deferred income taxes, non-current		60.5
Intangible assets		55.7
Other non-current assets		14.9
Total assets acquired		1,157.0
Accounts payable		(300.0)
Deferred income taxes, current		(68.8)
Other current liabilities		(83.2)
Deferred income taxes, non-current		(0.5)
Long-term accrued liabilities		(200.3)
Total liabilities assumed		(652.8)
Net assets acquired		504.2
Gain on acquisition		(24.3)
Purchase price		$ 479.9

Acquisitions (Unaudited Proforma Consolidated Results Of Operations) (Details) - Acquisition Of SANYO Semiconductor Co., Ltd. [Member] $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2010 USD ($) $ / shares
Business Acquisition [Line Items]
Net Revenues \| $	$ 3,848.2
Net Income \| $	$ 104.1
Net income per common share-Basic \| $ / shares	$ 0.24
Net income per common share-Diluted \| $ / shares	$ 0.23

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

Acquisitions (Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($) years	Feb. 27, 2011 USD ($)
Business Acquisition [Line Items]
Ownership percentage	20.00%
In-Process Research And Development [Member]
Business Acquisition [Line Items]
In-process research and development	$ 0.6
Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]
Business Acquisition [Line Items]
Ownership percentage		100.00%
Acquired intangible assets	22.4
Goodwill	7.5
Intangible assets	11.2
In-process research and development	$ 11.2
Present value calculations discount rate	17.50%
Weighted-average useful life, years \| years	6.1
Total business acquisition cost	$ 34.1	$ 34.1
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Nontax Deductible Amount	7.5
Goodwill not deductible for tax purpose	7.5
Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	$ 4.2
Weighted-average useful life, years	6.0
Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member] \| Developed Technology [Member]
Business Acquisition [Line Items]
Intangible assets	$ 6.2
Weighted-average useful life, years	7.0
Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member] \| Backlog [Member]
Business Acquisition [Line Items]
Intangible assets	$ 0.8
Weighted-average useful life, years \| years	0.3
Initial Estimate [Member] \| Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		1.5
Receivables, net		2.6
Inventories		9.2
Other current assets		0.4
Property, plant and equipment		1.2
Goodwill		8.0
Intangible assets		11.2
In-process research and development		11.2
Total assets acquired		45.3
Accounts payable		(5.6)
Other current liabilities		(4.2)
Other non-current liabilities		(1.4)
Total liabilities assumed		(11.2)
Net assets acquired		34.1
Adjustments [Member] \| Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]
Business Acquisition [Line Items]
Goodwill		(0.5)
Total assets acquired		(0.5)
Other current liabilities		0.5
Total liabilities assumed		0.5
Total [Member] \| Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		1.5
Receivables, net		2.6
Inventories		9.2
Other current assets		0.4
Property, plant and equipment		1.2
Goodwill		7.5
Intangible assets		11.2
In-process research and development		11.2
Total assets acquired		44.8
Accounts payable		(5.6)
Other current liabilities		(3.7)
Other non-current liabilities		(1.4)
Total liabilities assumed		(10.7)
Net assets acquired		$ 34.1

Acquisitions (Acquisition Of Sound Design Technologies LTD) (Details)	12 Months Ended
	Dec. 31, 2011 USD ($) years	Jun. 09, 2010 USD ($)
Business Acquisition [Line Items]
Ownership percentage	20.00%
Acquisition Of Sound Design Technologies LTD [Member]
Business Acquisition [Line Items]
Effective date of acquisition	June 9, 2010
Ownership percentage		100.00%
Business acquisition paid in cash		$ 22,000,000
Business acquisition contingent liability		$ 1,800,000
Range of potential earn-out payments, low	$ 0
Range of potential earn-out payments, high	10,000,000
Earn out potential	0
Receivables, net	3,300,000
Inventories	7,800,000
Other current assets	1,000,000
Property, plant and equipment	2,700,000
Goodwill	5,900,000
Intangible assets	2,400,000
In-process research and development	2,800,000
Other non-current assets	2,000,000
Total assets acquired	27,900,000
Accounts payable	(2,200,000)
Other current liabilities	(1,900,000)
Total liabilities assumed	(4,100,000)
Net assets acquired	23,800,000
Acquired intangible assets	$ 5,200,000
Discount rate used for present value calculations	9.00%
Weighted-average useful life, years \| years	10
Total business acquisition cost	$ 23,800,000
Automotive, Industrial, Medical And Mil-Aero Products Group [Member]
Business Acquisition [Line Items]
Goodwill	$ 8,700,000
Customer Relationships [Member] \| Acquisition Of Sound Design Technologies LTD [Member]
Business Acquisition [Line Items]
Weighted-average useful life, years \| years	15.5
Intangible assets	$ 1,700,000
Developed Technology [Member] \| Acquisition Of Sound Design Technologies LTD [Member]
Business Acquisition [Line Items]
Weighted-average useful life, years \| years	5.0
Intangible assets	$ 700,000
In-Process Research And Development [Member]
Business Acquisition [Line Items]
In-process research and development	600,000
In-Process Research And Development [Member] \| Acquisition Of Sound Design Technologies LTD [Member]
Business Acquisition [Line Items]
In-process research and development	$ 2,800,000

Acquisitions (Acquisition of California Micro Devices Corporation) (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 27, 2010 USD ($) $ / shares	Dec. 31, 2011 USD ($) years
Business Acquisition [Line Items]
Ownership percentage		20.00%
Acquisition Of California Micro Devices Corporation [Member]
Business Acquisition [Line Items]
Effective date of acquisition		January 27, 2010
Ownership percentage	100.00%
Purchase price of common stock, per share \| $ / shares	$ 4.70
Business acquisition paid in cash	$ 109.5
Fair value of stock options and restricted stock	3.7
Total business acquisition cost	$ 113.2	$ 113.2
Cash and cash equivalents		42.8
Receivables, net		5.0
Inventories		9.0
Other current assets		2.0
Property, plant and equipment		1.7
Goodwill		20.3
Intangible assets		21.7
In-process research and development		18.6
Other non-current assets		0.1
Total assets acquired		121.2
Accounts payable		(6.2)
Other current liabilities		(1.6)
Long-term accrued liabilities		(0.2)
Total liabilities assumed		(8.0)
Net assets acquired		113.2
Acquired intangible assets		$ 40.3
Discount rate used for present value calculations		13.20%
Goodwill not deductible for tax purpose		$ 20.3
Customer Relationships [Member] \| Acquisition Of California Micro Devices Corporation [Member]
Business Acquisition [Line Items]
Weighted-average useful life, years \| years		10
Intangible assets		$ 4.0
Developed Technology [Member] \| Acquisition Of California Micro Devices Corporation [Member]
Business Acquisition [Line Items]
Weighted-average useful life, years \| years		8
Intangible assets		$ 17.7

Restructuring, Asset Impairments And Other, Net (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended			24 Months Ended		36 Months Ended
	Dec. 31, 2011 USD ($) employees	Dec. 31, 2011 USD ($) employees	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2011 USD ($) employees	Dec. 31, 2010 USD ($) employees	Dec. 31, 2011 USD ($)
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		$ 86.3	$ 3.9	$ 6.3
Accrued liabilities	$ 17.3	17.3	11.3		$ 17.3	$ 11.3	$ 17.3
Recovery from insurance on property, plant and equipment		13.3
Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		25.8
Accrued liabilities	8.9	8.9	1.4		8.9	1.4	8.9
Cash paid for exit costs		18.3
Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		3.3
Accrued liabilities	8.4	8.4	9.9		8.4	$ 9.9	8.4
Cash paid for exit costs		3.3
Restructuring Activities Related To 2011 Thailand Closure [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		24.8
Cumulative restructuring charges, net of adjustments		$ 11.9
Number of employees terminated \| employees		1,452
Cash paid for exit costs		$ 5.7
Costs incurred associated with closure of facilities		2.1
Damaged inventory write-off		28.3
Additional employee separation charges expected to incur		1.4
Recovery from insurance on property, plant and equipment		25.0
Restructuring Activities Related To 2011 Thailand Closure [Member] \| Non-Cash Insurance Recovery [Member]
Restructuring Cost and Reserve [Line Items]
Non-cash insurance recovery	23.9	23.9			23.9		23.9
Restructuring Activities Related To 2011 Thailand Closure [Member] \| Accrued Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	0.5	0.5			0.5		0.5
Restructuring Activities Related To 2011 Aizu Closure [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		61.5
Cumulative restructuring charges, net of adjustments		70.0
Cash paid for exit costs		6.5
Costs incurred associated with closure of facilities		2.0
Restructuring Activities Related To 2011 Aizu Closure [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Additional employee separation charges expected to incur		9.4
Restructuring Activities Related To 2011 Aizu Closure [Member] \| Accrued Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	6.5	6.5			6.5		6.5
Restructuring Activities Related To 2011 Aizu Closure [Member] \| Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred associated with closure of facilities		3.0
Restructuring Activities Related To The 2011 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		2.5
Restructuring Activities Related To The 2011 Global Workforce Reduction [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Cash paid for exit costs		2.5
Restructuring Activities Related To The 2011 Global Workforce Reduction [Member] \| Accrued Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	1.6	1.6			1.6		1.6
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		4.3
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		2.7
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member] \| Accrued Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	0.2	0.2			0.2		0.2
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member] \| Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		1.6
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member] \| Accrued Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	0.3	0.3			$ 0.3		0.3
Restructuring Activities Related To The 2011 SANYO Acquisition [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		$ 10.0
Restructuring Activities Related To The 2011 SANYO Acquisition [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		289
Cash paid for exit costs		$ 8.5
Restructuring Activities Related To The 2011 SANYO Acquisition [Member] \| Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments		1.5
Restructuring Activities Related To The 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		0.1
Number of employees terminated \| employees					27
Restructuring Activities Related To The 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments					$ 3.5
Restructuring Activities Related To The 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member] \| Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring charges, net of adjustments					0.1
Restructuring Activities Related To The 2009 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		0.4
Cumulative restructuring charges, net of adjustments							13.0
Number of employees terminated \| employees						570
Acquisition Of AMIS Holdings, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities			10.0			$ 10.0
Acquisition Of AMIS Holdings, Inc. [Member] \| Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities			0.2			0.2
Acquisition Of AMIS Holdings, Inc. [Member] \| Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities			$ 9.8			$ 9.8
Costs incurred associated with closure of facilities		1.5
Acquisition Of AMIS Holdings, Inc. [Member] \| Fabrication Facility [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred associated with closure of facilities		0.5
Acquisition Of AMIS Holdings, Inc. [Member] \| Accrued Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	$ 8.1	8.1			$ 8.1		$ 8.1
Tsunami [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		4.8
Project Associated With Prior Acquisition [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		$ 0.5
Number Of Former Executive Officers [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		5
Notified But Still Employed [Member] \| Restructuring Activities Related To The 2011 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees	7
Total Employees Notified [Member] \| Restructuring Activities Related To 2011 Thailand Closure [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		1,600
Total Employees Notified [Member] \| Restructuring Activities Related To 2011 Aizu Closure [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		207
Total Employees Notified [Member] \| Restructuring Activities Related To The 2011 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		42
Total Employees Notified [Member] \| Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated \| employees		166

Restructuring, Asset Impairments And Other, Net (Reconciliation Of "Restructuring, Asset Impairments And Other, Net" Caption On The Consolidated Statement Of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Restructuring Cost and Reserve [Line Items]
Asset Impairment	$ 86.3	$ 3.9	$ 6.3
Restructuring Activities Related To 2011 Thailand Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	5.7
Asset Impairment	24.8
Other	(18.6)
Total	11.9
Restructuring Activities Related To 2011 Aizu Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	6.5
Asset Impairment	61.5
Other	2.0
Total	70.0
Restructuring Activities Related To The 2011 SANYO Acquisition [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	10.0
Total	10.0
Restructuring Activities Related To 2011 Japan Earthquake And Tsunami [Member]
Restructuring Cost and Reserve [Line Items]
Other	4.8
Total	4.8
Restructuring Activities Related To The 2011 Phoenix Wafer Manufacturing Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	4.3
Total	4.3
Restructuring Activities Related To The 2011 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	2.5
Total	2.5
Restructuring Activities Related To 2011 Lease Termination Adjustment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	(1.3)
Total	(1.3)
Restructuring Activities Related To 2011 IPRD Project Write-Off [Member]
Restructuring Cost and Reserve [Line Items]
Other	0.5
Total	0.5
Restructuring Activities Related To 2011 Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	27.7
Asset Impairment	86.3
Other	(11.3)
Total	102.7
Restructuring Activities Related To 2010 Acquisition Of SDT [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	2.2
Total	2.2
Restructuring Activities Related To The 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	3.5
Asset Impairment	0.1
Total	3.6
Restructuring Activities Related To 2010 Cost Basis Investment Write-Off [Member]
Restructuring Cost and Reserve [Line Items]
Other	3.9
Total	3.9
Restructuring Activities Related To 2010 Other Miscellaneous Items [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	0.3
Asset Impairment	0.1
Other	0.4
Total	0.8
Restructuring Activities Related To 2010 Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	6.0
Asset Impairment	0.2
Other	4.3
Total	10.5
Restructuring Activities Related To The 2009 Global Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	12.6
Asset Impairment	0.4
Total	13.0
Restructuring Activities Related To 2009 Piestany, Slovakia Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	1.7
Asset Impairment	1.7
Other	5.4
Total	8.8
Restructuring Activities Related To 2009 Belgium Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	3.9
Total	3.9
Restructuring Activities Related To 2009 Gain On Sale Of Intellectual Property [Member]
Restructuring Cost and Reserve [Line Items]
Other	(2.0)
Total	(2.0)
Restructuring Activities Related To 2009 Gain On Settlement Of Two Legal Matters [Member]
Restructuring Cost and Reserve [Line Items]
Other	(2.5)
Total	(2.5)
Restructuring Activities Related To 2009 Other Miscellaneous Items [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	1.0
Asset Impairment	2.0
Other	0.7
Total	3.7
Restructuring Activities Related To 2009 Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring	19.2
Asset Impairment	4.1
Other	1.6
Total	$ 24.9

Restructuring, Asset Impairments And Other, Net (Rollforward Of Accrued Restructuring Charges) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($)
Restructuring Cost and Reserve [Line Items]
Balance at Beginning of Period	$ 11.3
Balance at End of Period	17.3
Estimated Employee Separation Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance at Beginning of Period	1.4
Charges	25.8
Usage	(18.3)
Balance at End of Period	8.9
Estimated Costs To Exit [Member]
Restructuring Cost and Reserve [Line Items]
Balance at Beginning of Period	9.9
Charges	3.3
Usage	(3.3)
Adjustments	(1.5)
Balance at End of Period	$ 8.4

- Definition

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

+ References + Details

Balance Sheet Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Balance Sheet Information [Abstract]
Depreciation expense for property, plant and equipment	$ 162.8	$ 115.1	$ 108.3
Asset impairments	86.3
Assets financed under capital leases included in total property, plant and equipment	89.5	$ 104.0
Foreign currency translation gains related to Aizu facility	$ 18.5

Balance Sheet Information (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Receivables, net:
Accounts receivable	$ 464.3	$ 301.9
Less: Allowance for doubtful accounts	(7.1)	(7.3)
Accounts receivable, net	457.2	294.6
Inventories:
Raw materials	58.8	49.0
Work in process	430.8	210.9
Finished goods	147.8	100.9
Inventories, net	637.4	360.8
Other Current Assets:
Deposits	1.9	1.9
Prepaid Expenses	26.9	22.2
Tax Receivables	41.0	14.9
Other	51.8	24.6
Other Current Assets	121.6	63.6
Property, plant and equipment, net:
Land	76.6	48.3
Buildings	539.3	484.4
Machinery and equipment	1,943.0	1,631.1
Total property, plant and equipment	2,558.9	2,163.8
Less: Accumulated depreciation	(1,449.4)	(1,299.5)
Property, plant and equipment, net	1,109.5	864.3
Accrued expenses:
Accrued payroll	125.2	73.1
Sales related reserves	45.5	36.5
Restructuring reserves	17.3	11.3
Accrued pension liability	11.4	0.3
Other	40.4	41.4
Total accrued expenses	239.8	162.6
Accumulated other comprehensive loss:
Foreign currency translation adjustments	(46.5)	(58.8)
Unrecognized prior service cost of defined benefit pension plan	(0.2)	(0.1)
Prior service cost from pension legal plan amendment	(0.1)	(0.2)
Total accumulated other comprehensive loss	$ (46.7)	$ (59.1)

Balance Sheet Information (Warranty Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Balance Sheet Information [Abstract]
Beginning Balance	$ 3.3	$ 3.2	$ 3.9
Provision	4.0	0.9	0.4
Usage	(1.5)	(0.8)	(1.1)
Ending Balance	$ 5.8	$ 3.3	$ 3.2

Long-Term Debt (Loss On Debt Repurchase/Exchange) (Details) - USD ($)
shares in Millions, $ in Millions

3 Months Ended

6 Months Ended

12 Months Ended

Dec. 15, 2012

Dec. 15, 2006

Sep. 30, 2011

Dec. 31, 2008

Mar. 28, 2008

Jul. 03, 2009

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Debt Instrument [Line Items]

Net carrying value

$ 1,207.0

$ 888.8

Shares of common stock issued during repurchase, value

$ 28.6

2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Net carrying value

$ 46.6

$ 207.9

^[1]

$ 410.1

^[1]

Par value of debt repurchased

$ 199.1

53.0

Par value of debt exchanged

$ 198.6

Debt instrument, interest rate

2.625%

Debt instrument, maturity year

2026

Cash paid on repurchase of senior notes

56.2

(Loss) gain on debt repurchase

5.3

Write-off of unamortized debt issuance costs

$ 0.5

Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]

Debt Instrument [Line Items]

Net carrying value

$ 94.2

$ 87.5

Par value of debt repurchased

$ 60.9

$ 99.7

$ 3.2

Debt instrument, interest rate

0.00%

Debt instrument, maturity year

2024

Cash paid on repurchase of senior notes

$ 49.4

64.8

(Loss) gain on debt repurchase

3.8

(3.1)

$ 0.1

Write-off of unamortized debt issuance costs

$ 0.5

$ 0.7

Shares issued during conversion

7.4

Shares of common stock issued during repurchase, value

$ 28.5

98.5

2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Net carrying value

^[2]

$ 176.6

Par value of debt exchanged

$ 198.6

Debt instrument, interest rate

2.625%

Debt instrument, maturity year

2026

(Loss) gain on debt repurchase

$ (17.9)

Write-off of unamortized debt issuance costs

1.7

Debt Repurchase [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Net carrying value

46.6

Par value of debt repurchased

$ 53.0

Debt instrument, interest rate

2.625%

Debt instrument, maturity year

2026

Cash paid on repurchase of senior notes

$ 56.2

(Loss) gain on debt repurchase

5.3

Write-off of unamortized debt issuance costs

0.5

Adjustment to additional paid-in capital for the reacquisition of equity component

4.8

Debt Repurchase [Member] | Senior Bank Facilities [Member]

Debt Instrument [Line Items]

Par value of debt repurchased

$ 169.8

(Loss) gain on debt repurchase

$ (0.8)

Debt Repurchase [Member] | Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]

Debt Instrument [Line Items]

Net carrying value

91.0

Par value of debt repurchased

$ 99.7

Debt instrument, maturity year

2024

Cash paid on repurchase of senior notes

$ 64.8

(Loss) gain on debt repurchase

$ 0.1

(3.1)

Write-off of unamortized debt issuance costs

$ 0.7

Shares issued during conversion

7.4

Shares of common stock issued during repurchase, value

$ 28.5

Debt Exchange [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Net carrying value

177.2

Par value of debt exchanged

$ 198.6

Debt instrument, maturity year

2026

Debt Exchange [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Net carrying value

$ 176.4

Par value of debt exchanged

198.6

Cash paid on repurchase of senior notes

15.9

Adjustment to additional paid-in capital for the reacquisition of equity component

21.0

Debt Exchange [Member] | New 2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Cash paid on repurchase of senior notes

$ 198.6

[1]	The 1.875% Convertible Senior Subordinated Notes due 2025 may be put back to the Company at the option of the holders of the notes on December 15 of 2012, 2015 and 2020 or called at the option of the Company on or after December 20, 2012.
[2]	The 2.625% Convertible Senior Subordinated Notes due 2026 may be put back to the Company at the option of the holders of the notes on December 15 of 2013, 2016 and 2021 or called at the option of the Company on or after December 20, 2013.

Long-Term Debt (Acquisition Note Payable To Sanyo Electric) (Details)	12 Months Ended
	Dec. 31, 2011 USD ($) years	Dec. 31, 2010 USD ($)
Servicing Assets at Fair Value [Line Items]
Long-term debt	$ 1,207,000,000	$ 888,800,000
SANYO Electric [Member]
Servicing Assets at Fair Value [Line Items]
Period of debt, in years \| years	7
Principal amount of debt	$ 377,500,000
Long-term debt	$ 339,800,000
Basis spread on variable rate	1.75%
Principal payment of loan, monthly	$ 9,400,000
Remaining balance of loan due in January 2008	$ 122,700,000
Debt instrument, interest rate	3-month LIBOR plus <font class="_mt">1.75</font>% per annum

Long-Term Debt (Senior Revolving Credit Facility) (Details) $ in Millions		12 Months Ended
	Dec. 23, 2011 USD ($) years	Dec. 31, 2011 USD ($)
Debt Instrument [Line Items]
Credit agreement, financial covenants		(i) a maximum total leverage ratio of consolidated total indebtedness to consolidated earnings before interest, taxes, depreciation and amortization ("consolidated EBITDA") for the trailing four consecutive quarters of <font class="_mt">3.75</font> to 1.00; and (ii) a minimum interest coverage ratio of consolidated EBITDA to consolidated interest expense for the trailing four consecutive quarters of <font class="_mt">3.50</font> to 1.0.
Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 325.0	$ 325.0
Period of debt, in years \| years	5
Debt issuance costs included in other assets		$ 2.3
Credit agreement date		December 23, 2011
Credit agreement financial covenants, maximum total leverage ratio		3.75
Credit agreement financial covenants, minimum interest coverage ratio		3.50
Senior Revolving Credit Facility [Member] \| SCI LLC [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 125.0
Ability to increase the size of the facility, in increments	10.0
Revolving Loans Under Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, maturity date		Dec. 23, 2016
Issuance Of Letters Of Credit [Member] \| Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	40.0
Swingline Loans For Short-Term Borrowings [Member] \| Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	15.0
Foreign Currency Sublimit [Member] \| Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 75.0

Long-Term Debt (Zero Coupon Convertible Senior Subordinated Notes) (Details) - USD ($) $ / shares in Units, shares in Millions			1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Aug. 09, 2006	Apr. 06, 2004	Jul. 21, 2006	Jun. 30, 2006	Dec. 31, 2008	Mar. 28, 2008	Jul. 03, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Debt Instrument [Line Items]
Proceeds from sale of notes								$ 69,000,000	$ 152,000,000	$ 79,500,000
Offering expenses capitalized as debt issuance costs								$ 6,200,000	$ 7,000,000
Shares of common stock issued during repurchase, value										$ 28,600,000
12% Senior Subordinated Notes Due 2009 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		12.00%
Debt instrument, maturity year		2009
Old Notes [Member]
Debt Instrument [Line Items]
Debt instrument, maturity year		2024
Note issued		$ 260,000,000
Proceeds from sale of notes		251,200,000
Offering expenses capitalized as debt issuance costs		$ 8,800,000
Effective interest rate		8.90%
Principal amount outstanding				$ 260,000,000
Exchange fee				2.50
Principal amount of original debt converted	$ 443,000			$ 1,000
Percentage of principal amount tendered and exchanged			99.80%
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate								0.00%
Debt instrument, maturity year								2024	2024
Note issued			$ 259,500,000
Principal amount outstanding								$ 99,400,000
Rate of conversion			101.8849
Principal amount of original debt converted			$ 1,000
Expiration period			Jul. 19, 2006
Par value of debt repurchased					$ 60,900,000		$ 99,700,000	3,200,000
Cash paid on repurchase of senior notes						$ 49,400,000	64,800,000
Write-off of unamortized debt issuance costs						500,000	700,000
(Loss) gain on debt repurchase						$ 3,800,000	$ (3,100,000)	100,000
Shares issued during conversion							7.4
Shares of common stock issued during repurchase, value							$ 28,500,000	$ 98,500,000
Initial conversion price of debt, per share								$ 9.815
Percentage of product of closing sale price of common stock and conversion rate								98.00%
Original debt extinguished								$ 96,200,000
Debt discount recognized								13,300,000
Unamortized debt discount								$ 2,000,000	$ 8,700,000

Long-Term Debt (1.875% Convertible Senior Subordinated Notes) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 21, 2005	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Debt Instrument [Line Items]
Proceeds from sale of notes		$ 69,000,000	$ 152,000,000	$ 79,500,000
Offering expenses capitalized as debt issuance costs		$ 6,200,000	$ 7,000,000
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Note issued	$ 95,000,000
Debt instrument, interest rate	1.875%	1.875%	1.875%
Debt instrument, maturity year	2025	2025	2025
Proceeds from sale of notes	$ 91,000,000
Offering expenses capitalized as debt issuance costs	$ 4,000,000
First interest payment date		June 15, 2006
Effective interest rate	9.50%
Rate of conversion		142.8571
Principal amount of original debt converted		$ 1,000
Initial conversion price of debt, per share		$ 7.00
Percentage of product of closing sale price of common stock and conversion rate		103.00%
Debt, maturity date		Dec. 15, 2025
Debt issuance cost		$ 500,000
Unamortized debt discount		$ 6,600,000	$ 12,800,000
Debt Redemption Date, December 20, 2012 [Member] \| 1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Percentage of principal amount of debt redeemed		100.00%
Debt Repayment Date, December 15, 2012 [Member] \| 1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Percentage of principal amount of debt redeemed		100.00%
Debt Repayment Date, December 15, 2015 [Member] \| 1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Percentage of principal amount of debt redeemed		100.00%
Debt Repayment Date, December 15, 2020 [Member] \| 1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Percentage of principal amount of debt redeemed		100.00%

Long-Term Debt (2.625% Convertible Senior Subordinated Notes) (Details) - USD ($)
$ / shares in Units, shares in Millions

3 Months Ended

12 Months Ended

Dec. 15, 2012

Dec. 15, 2006

Sep. 30, 2011

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Debt Instrument [Line Items]

Proceeds from sale of notes

$ 69,000,000

$ 152,000,000

$ 79,500,000

Offering expenses capitalized as debt issuance costs

6,200,000

7,000,000

Net carrying value

$ 1,207,000,000

$ 888,800,000

2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Note issued

$ 484,000,000

Par value of debt exchanged

$ 198,600,000

Debt instrument, interest rate

2.625%

Debt instrument, maturity year

2026

Proceeds from sale of notes

$ 471,700,000

Offering expenses capitalized as debt issuance costs

$ 13,300,000

Shares of common stock repurchased

30.7

Repurchase of common stock outstanding

$ 230,000,000

Effective interest rate

8.50%

Rate of conversion

95.2381

Initial conversion price of debt, per share

$ 10.50

Percentage of product of closing sale price of common stock and conversion rate

103.00%

Par value of debt repurchased

$ 199,100,000

$ 53,000,000

Net carrying value

46,600,000

$ 207,900,000

^[1]

$ 410,100,000

^[1]

Cash paid on repurchase of senior notes

56,200,000

Write-off of unamortized debt issuance costs

500,000

(Loss) gain on debt repurchase

$ 5,300,000

Debt issuance cost

1,900,000

Unamortized debt discount

$ 24,500,000

$ 73,900,000

2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Par value of debt exchanged

$ 198,600,000

Debt instrument, interest rate

2.625%

Debt instrument, maturity year

2026

Offering expenses capitalized as debt issuance costs

$ 1,400,000

First put date

Dec. 15, 2016

Rate of conversion

95.2381

Principal amount of original debt converted

$ 1,000

Initial conversion price of debt, per share

$ 10.50

Percentage of product of closing sale price of common stock and conversion rate

103.00%

Net carrying value

^[2]

$ 176,600,000

Write-off of unamortized debt issuance costs

1,700,000

(Loss) gain on debt repurchase

(17,900,000)

Debt issuance cost

1,400,000

Unamortized debt discount

$ 22,000,000

Debt Redemption Date, December 20, 2016 [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Percentage of principal amount of debt redeemed

100.00%

Debt Redemption Date, December 20, 2013 [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Percentage of principal amount of debt redeemed

100.00%

Debt Repayment Date, December 15, 2013 [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Percentage of principal amount of debt redeemed

100.00%

Debt Repayment Date, December 15, 2016 [Member] | 2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Percentage of principal amount of debt redeemed

100.00%

[1]	The 1.875% Convertible Senior Subordinated Notes due 2025 may be put back to the Company at the option of the holders of the notes on December 15 of 2012, 2015 and 2020 or called at the option of the Company on or after December 20, 2012.
[2]	The 2.625% Convertible Senior Subordinated Notes due 2026 may be put back to the Company at the option of the holders of the notes on December 15 of 2013, 2016 and 2021 or called at the option of the Company on or after December 20, 2013.

Long-Term Debt (Capital Lease Obligations And Debt Guarantees) (Details) $ in Millions		1 Months Ended	12 Months Ended
	Dec. 15, 2006	Dec. 21, 2005	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($) years	Dec. 15, 2012
Debt Instrument [Line Items]
Net book value of assets sold				$ 25.2
Proceeds from sale of assets				37.1
Deferred gain on sale of assets				11.9
Net present value of minimum lease payments				$ 37.1
Depreciation period of leased assets \| years				4
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital lease obligations for machinery and equipment			$ 100.9
Capital lease obligations, interest rate range minimum			1.90%
Capital lease obligations, interest rate range maximum			15.50%
Capital lease obligations, maturities range minimum			first quarter of 2012
Capital lease obligations, maturities range maximum			first quarter of 2020
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.00%
Debt instrument, maturity year			2024	2024
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		1.875%	1.875%	1.875%
Debt instrument, maturity year		2025	2025	2025
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	2.625%		2.625%	2.625%	2.625%
Debt instrument, maturity year	2026		2026	2026

Long-Term Debt (Annual Maturities Relating To Long-Term Debt) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Dec. 15, 2006	Dec. 21, 2005	Dec. 31, 2011	Dec. 31, 2010	Dec. 15, 2012
Debt Instrument [Line Items]
2012			$ 378.8
2013			329.4
2014			75.2
2015			63.4
2016			237.4
Thereafter			178.0
Long-term debt, including par value			1,262.2
Principal payments relating to Zero Coupon Convertible Senior Subordinated Notes due 2024, 1.875% Convertible Senior Subordinated Notes due 2025, 2.625% Convertible Senior Subordinated Notes due 2026 and 2.625% Convertible Senior Subordinated Notes due 2026, Series B			$ 622.2
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.00%
Debt instrument, maturity year			2024	2024
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		1.875%	1.875%	1.875%
Debt instrument, maturity year		2025	2025	2025
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	2.625%		2.625%	2.625%	2.625%
Debt instrument, maturity year	2026		2026	2026

Long-Term Debt (Long-Term Debt) (Details) - USD ($)
$ in Millions

1 Months Ended

12 Months Ended

Dec. 15, 2006

Dec. 21, 2005

Dec. 31, 2011

Dec. 31, 2010

Dec. 15, 2012

Dec. 23, 2011

Sep. 30, 2011

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 1,207.0

$ 888.8

Less: Current maturities

(370.1)

(136.0)

Long-term debt

836.9

$ 752.8

Senior Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Credit facility, maximum borrowing capacity

325.0

$ 325.0

Loan With A Japanese Company Due 2012 Through 2018, Interest Payable Quarterly At 2.33% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 339.8

Debt instrument, interest rate

2.33%

Debt instrument maturity year, start

2012

Debt instrument maturity year, end

2018

Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 94.2

$ 87.5

Debt instrument, maturity year

2024

Debt instrument, interest rate

0.00%

Debt instrument, discount

$ 2.0

$ 8.7

1.875% Convertible Senior Subordinated Notes Due 2025 [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

^[1]

$ 88.4

$ 82.2

Debt instrument, maturity year

2025

Debt instrument, interest rate

1.875%

Debt instrument, discount

$ 6.6

$ 12.8

2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 207.9

^[2]

$ 410.1

^[2]

$ 46.6

Debt instrument, maturity year

2026

Debt instrument, interest rate

2.625%

Debt instrument, discount

$ 24.5

$ 73.9

2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

^[3]

$ 176.6

Debt instrument, maturity year

2026

Debt instrument, interest rate

2.625%

Debt instrument, discount

$ 22.0

Loan With Hong Kong Bank, Interest Payable Weekly At 2.04% And 2.03% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

^[4]

$ 40.0

Debt instrument, interest rate

2.04%

2.03%

Loans With Philippine Banks Due 2012 Through 2015, Interest Payable Monthly And Quarterly At An Average Rate Of 2.01% And 1.80% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 68.2

$ 68.8

Debt instrument, interest rate

2.01%

1.80%

Debt instrument maturity year, start

2012

Debt instrument maturity year, end

2015

Loans With Chinese Banks Due 2013, Interest Payable Quarterly At An Average Rate Of 4.44% And 4.23% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 7.0

$ 34.0

Debt instrument, maturity year

2013

Debt instrument, interest rate

4.44%

4.23%

Debt instrument maturity year, start

2012

Debt instrument maturity year, end

2013

Loans With Japanese Banks Due Through 2013, Interest Payable Monthly And Semi-Annually At An Average Rate Of 1.71% And 1.45% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 3.5

$ 3.9

Debt instrument, interest rate

1.71%

1.45%

Debt instrument maturity year, start

2012

Debt instrument maturity year, end

2013

Loan With Singapore Bank, Interest Payable Weekly At 1.97% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 25.0

Debt instrument, interest rate

1.97%

Loan With British Finance Company, Interest Payable Monthly At 2.42% And 2.18% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 13.1

$ 13.8

Debt instrument, interest rate

2.42%

2.18%

U.S. Real Estate Mortgages Payable Monthly Through 2016 At An Average Rate Of 4.86% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 31.6

$ 33.0

Debt instrument, maturity year

2016

Debt instrument, interest rate

4.86%

U.S. Equipment Financing Payable Monthly Through 2015 At 3.23% [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 10.8

Debt instrument, maturity year

2015

Debt instrument, interest rate

3.23%

Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Long-term debt, including current maturities

$ 100.9

$ 115.5

Debt instrument maturity year, start

first quarter of 2012

Debt instrument maturity year, end

first quarter of 2020

[1]	The Zero Coupon Convertible Senior Subordinated Notes due 2024 may be put back to the Company at the option of the holders of the notes on April 15 of 2012, 2014 and 2019 or called at the option of the Company on or after April 15, 2012.
[2]	The 1.875% Convertible Senior Subordinated Notes due 2025 may be put back to the Company at the option of the holders of the notes on December 15 of 2012, 2015 and 2020 or called at the option of the Company on or after December 20, 2012.
[3]	The 2.625% Convertible Senior Subordinated Notes due 2026 may be put back to the Company at the option of the holders of the notes on December 15 of 2013, 2016 and 2021 or called at the option of the Company on or after December 20, 2013.
[4]	The 2.625% Convertible Senior Subordinated Notes due 2026, Series B may be put back to the Company at the option of the holders of the notes on December 15 of 2016 and 2021 or called at the option of the Company on or after December 20, 2016.

Long-Term Debt (Summary Of Foreign And Domestic Subsidiaries Debt Arrangements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Long-term debt	$ 1,207.0	$ 888.8
Philippine Loan [Member]
Debt Instrument [Line Items]
Long-term debt	$ 10.0
Secured By	Unsecured
Philippines Loans [Member]
Debt Instrument [Line Items]
Long-term debt	$ 58.2
Secured By	Equipment
Singapore Loan [Member]
Debt Instrument [Line Items]
Principal outstanding balance of bank loans	$ 25.0
Secured By	Accounts Receivable
Chinese Loan [Member]
Debt Instrument [Line Items]
Long-term debt	$ 7.0
Secured By	Unsecured
Japan Loan [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3.5
Secured By	Unsecured
U.S. Real Estate Mortgages [Member]
Debt Instrument [Line Items]
Long-term debt	$ 31.6
Secured By	Real Estate
Loan With British Finance Company [Member]
Debt Instrument [Line Items]
Long-term debt	$ 13.1
Secured By	Accounts Receivable
Loan With Hong Kong Bank [Member]
Debt Instrument [Line Items]
Long-term debt	$ 40.0
Secured By	Accounts Receivable
U.S. Equipment Financing
Debt Instrument [Line Items]
Long-term debt	$ 10.8
Secured By	Equipment

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes [Line Items]
Valuation allowance	$ 1,626.1	$ 560.8
Operating loss carryforwards, expiration period	2012 through 2028
Limitation for the use of federal NOL's	$ 93.1
Provision for income taxes	22.9	12.8	$ 7.7
Income and withholding taxes, foreign	19.4	13.5	13.0
Additional valuation allowance	3.2
New reserves and interest on existing reserve for potential liabilities	2.9	2.7	3.4
Reversal of reserves and interest for potential liabilities	2.6	3.4
Reversal of accrued income taxes for anticipated audit issues			8.7
Balance of unrecognized tax benefit	18.6	13.4	17.0	$ 19.4
Undistributed earnings to be reinvested	1,288.7
Unrecognized tax position, that would affect the annual effective tax rate	17.7
Change in tax position reasonably possible	1.4
Interest and penalties recognized	(0.1)	(0.1)	(0.8)
Increase in balance of accrued interest and penalties			0.9
Accrued interest and penalties	2.9	$ 2.9	$ 4.0
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	874.8
State [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	932.6
Foreign [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	1,529.3
Stock Option Deductions [Member]
Income Taxes [Line Items]
Valuation allowance	$ 14.9

Income Taxes (Income (Loss) Before Income Taxes And Minority Interests) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
United States	$ (143.9)	$ (57.5)	$ (28.3)
Foreign	181.7	363.2	99.3
Income before income taxes	$ 37.8	$ 305.7	$ 71.0

Income Taxes (Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Current, Federal	$ 0.5	$ (0.3)	$ (1.8)
Current, State and local	0.3	0.4	0.2
Current, Foreign	25.0	8.4	7.8
Current, Provision (benefit) for income taxes	25.8	8.5	6.2
Deferred, Federal		(1.2)	1.2
Deferred, Foreign	(2.9)	5.5	0.3
Deferred, Provision (benefit) for income taxes	(2.9)	4.3	1.5
Provision (benefit) for income taxes	$ 22.9	$ 12.8	$ 7.7

- Definition

The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Paragraph Question 1-7

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6509736

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.7)
-URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817

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-Name Accounting Standards Codification
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-Paragraph 9
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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
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-Name Accounting Standards Codification
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-Name Statement of Financial Accounting Standard (FAS)
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

+ Details

- Definition

The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable Income or Loss from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Article 4

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-Name Staff Accounting Bulletin (SAB)
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+ Details

- Definition

The component of total income tax expense for the period comprised of the increase (decrease) during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6510177

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-Name Staff Accounting Bulletin (SAB)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The component of total income tax expense for the period comprised of the increase (decrease) in the entity's net foreign deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of applicable enacted tax laws of countries other than the country of domicile.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6510177

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-Name Accounting Standards Codification
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-Name Statement of Financial Accounting Standard (FAS)
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

+ Details

Income Taxes (Reconciliation Of The U.S. Federal Statutory Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
State and local taxes, net of federal tax benefit	0.70%	0.10%	0.40%
Foreign withholding taxes	0.10%		3.30%
Foreign rate differential	(588.00%)	(36.50%)	(39.60%)
Dividend income from foreign subsidiaries	146.10%	15.30%	89.10%
Gain on SANYO Semiconductor acquisition	(22.50%)
Research and development credit monetization		(0.10%)	(2.80%)
Change in valuation allowance	491.50%	(8.00%)	(72.00%)
Tax reserves	0.80%	(0.30%)	(7.50%)
Other	(3.10%)	(1.30%)	4.90%
Effective income tax rate	60.60%	4.20%	10.80%

Income Taxes (Tax Effects Of Temporary Differences) (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Net operating loss and tax credit carryforwards	$ 1,056.5	$ 424.1
Tax-deductible goodwill	40.6	65.3
Reserves and accruals	31.7	67.2
Property, plant and equipment	360.5	7.4
Inventories	101.3	14.0
Other	28.6	(19.7)
Deferred tax assets and liabilities before valuation allowance	1,619.2	558.3
Valuation allowance	(1,626.1)	(560.8)
Net deferred tax asset (liability)	$ (6.9)	$ (2.5)

Income Taxes (Activity For Unrecognized Gross Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance at beginning of year	$ 13.4	$ 17.0	$ 19.4
Reserves acquired	1.3		2.7
Additions based on tax positions related to the current year	5.5	1.2	1.4
Additions for tax positions of prior years	0.8	0.5	1.0
Reductions for tax positions of prior years	(1.4)	(0.3)	(3.9)
Lapse of statute	(1.0)	(5.0)	(3.6)
Balance at end of year	$ 18.6	$ 13.4	$ 17.0

Earnings Per Share And Equity (Narrative) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Dec. 15, 2006	Dec. 21, 2005	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 15, 2012
Earnings Per Share And Equity [Line Items]
Excluded option shares			11,700,000	13,700,000	13,100,000
Amounts remitted for applicable withholding taxes on underlying restricted stock units			$ 19.3	$ 15.0
Common stock withheld underlying restricted stock units			2,037,941	1,956,317
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Earnings Per Share And Equity [Line Items]
Debt instrument, maturity year			2024	2024
Debt instrument, interest rate			0.00%
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Earnings Per Share And Equity [Line Items]
Debt instrument, maturity year	2026		2026	2026
Debt instrument, interest rate	2.625%		2.625%	2.625%		2.625%
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Earnings Per Share And Equity [Line Items]
Debt instrument, maturity year		2025	2025	2025
Debt instrument, interest rate		1.875%	1.875%	1.875%

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
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-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings Per Share And Equity (Income Per Share Calculations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings Per Share And Equity [Abstract]
Net income per common share attributable to ON Semiconductor Corporation	$ (8.8)	$ (49.4)	$ 34.3	$ 35.5	$ 61.0	$ 87.8	$ 78.7	$ 63.0	$ 11.6	$ 290.5	$ 61.0
Basic weighted average common shares outstanding									446.7	431.0	420.8
Dilutive effect of stock options and awards									7.6	9.3	8.5
Dilutive effect of convertible notes									2.9	4.1	2.8
Diluted weighted average common shares outstanding									457.2	444.4	432.1
Basic									$ 0.03	$ 0.67	$ 0.14
Diluted	$ (0.02)	$ (0.11)	$ 0.07	$ 0.08	$ 0.14	$ 0.20	$ 0.18	$ 0.14	$ 0.03	$ 0.65	$ 0.14

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 36, 37, 38
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Number 210
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.23)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 19

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e565-108580

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Share-Based Compensation (Narrative) (Details)	1 Months Ended			12 Months Ended
Share-Based Compensation (Narrative) (Details)	Jan. 31, 2010 shares	Oct. 31, 2008 shares	Mar. 31, 2008 shares	Dec. 31, 2011 USD ($) years $ / shares shares	Dec. 31, 2010 USD ($) $ / shares shares	Dec. 31, 2009 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of options				90
Estimated pre-vesting forfeitures				11.00%	12.00%	12.00%
Stock options shares vested and expected to vest				18,200,000
Weighted average exercise price of stock options shares vested and expected to vest \| $ / shares				$ 7.7
Net stock options as a percentage of outstanding shares at beginning of period				0.02%	(0.20%)
Stock options granted as a percentage of outstanding shares at end of period				0.25%	0.41%
Total Intrinsic value of stock options exercised \| $				$ 35,700,000
Cash received from exercise of stock options \| $				59,400,000	$ 23,300,000	$ 17,500,000
Cash received from issuance of shares under ESPP \| $				$ 8,100,000	$ 7,000,000	$ 5,500,000
Closing price of company stock \| $ / shares				$ 7.72
2000 SIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance				30,500,000
Additional common shares reserved for issuance as a percentage of common stock outstanding				3.00%
Vesting period of options				four
Term of options, in years \| years				10
Restricted stock units vesting period, minimum (in years) \| years				3
Restricted stock units vesting period, maximum (in years) \| years				4
Expiration date of options				Feb. 17, 2010
2000 SIP [Member] \| AMIS Holdings, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares added to the plan due to assumption of shares			4,900,000
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value assumptions on stock options granted \| $ / shares				$ 3.88	$ 3.11	$ 3.39
Employee Stock Options [Member] \| AMIS Holdings, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options assumed			9,400,000
Employee Stock Options [Member] \| Catalyst Semiconductor, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options assumed		3,900,000
Employee Stock Options [Member] \| California Micro Devices Corporation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options assumed	2,400,000
Additional employee stock options assumed	300,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units/awards granted				5,100,000
Compensation expense recognized \| $				$ 20,900,000
Weighted average fair value of restricted stock units granted \| $ / shares				$ 10.04
Unrecognized share-based compensation expense on non-vested stock options \| $				$ 15,300,000
Estimated pre-vesting forfeitures				8.00%	12.00%	12.00%
Restricted Stock Units [Member] \| Officers And Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units/awards granted				3,600,000
Restricted Stock Units [Member] \| AMIS Holdings, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock unit awards assumed			1,100,000
Restricted Stock Units [Member] \| Catalyst Semiconductor, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock unit awards assumed		400,000
Amended And Restated SIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate of common stock available for grant				17,400,000
Total number of share of stock under the plan				26,100,000
Vesting period of options				four
Term of options, in years \| years				7
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized \| $				$ 13,700,000
Unrecognized share-based compensation expense on non-vested stock options \| $				10,300,000
Time-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized \| $				7,200,000
Unrecognized share-based compensation expense on non-vested stock options \| $				$ 25,600,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units/awards granted				100,000
Weighted average fair value of restricted stock units granted \| $ / shares				$ 10.55
Stock-based compensation expense related to awards granted \| $				$ 1,500,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate of common stock available for grant				4,100,000
Total number of share of stock under the plan				15,000,000
Employee subscription rate				10.00%
Price of common stock as a percentage of fair market value of shares				85.00%
Annual purchase limit by employees under the plan \| $				$ 25,000
Maximum shares authorized for purchase by employees				500
Numerator in fixing the shares authorized for purchase \| $				$ 6,250
Weighted-average fair value assumptions on stock options granted \| $ / shares				$ 2.09	$ 1.71	$ 1.57
Cash received from exercise of stock options \| $				$ 59,400,000
Cash received from issuance of shares under ESPP \| $				$ 8,100,000
Shares purchased by employees under the plan				1,200,000	1,200,000	1,200,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense on non-vested stock options \| $				$ 7,900,000
Weighted average period for recognition of unrecognized compensation cost (in years) \| years				2.0

Share-Based Compensation (Summary Of Restricted Stock Units Transactions) (Details) - Restricted Stock Units [Member] shares in Millions	12 Months Ended
	Dec. 31, 2011 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested shares of restricted stock units at December 31, 2010 \| shares	12.3
Number of Shares, Granted \| shares	5.1
Number of Shares, Released \| shares	(6.5)
Number of Shares, Forfeited \| shares	(1.3)
Nonvested shares of restricted stock units at December 31, 2011 \| shares	9.6
Weighted Average Grant Date Fair Value, Nonvested shares of restricted stock units at December 31, 2010 \| $ / shares	$ 5.19
Weighted Average Grant Date Fair Value, Granted \| $ / shares	10.04
Weighted Average Grant Date Fair Value, Released \| $ / shares	4.47
Weighted Average Grant Date Fair Value, Forfeited \| $ / shares	7.41
Weighted Average Grant Date Fair Value, Nonvested shares of restricted stock units at December 31, 2011 \| $ / shares	$ 7.95

Share-Based Compensation (Weighted-Average Assumptions Of Employee Stock Options) (Details) - Employee Stock Options [Member] - years	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	52.10%	46.80%	54.90%
Risk-free interest rate	1.20%	1.70%	2.40%
Expected term	4.8	5.0	5.3

Share-Based Compensation (Weighted-Average Assumptions With Employee Stock Purchase Plan) (Details) - Employee Stock Purchase Plan [Member] - years	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	0.25	0.25	0.25
Risk-free interest rate	0.05%	0.14%	0.15%
Volatility	39.00%	39.00%	83.00%

Share-Based Compensation (Summary Of Share-Based Compensation Expense) (Details) - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

$ 33.5

$ 52.7

$ 54.2

Related income tax benefits

^[1]

Share-based compensation expense, net of taxes

33.5

52.7

54.2

Cost Of Revenues [Member]

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

6.3

14.1

13.7

Research And Development [Member]

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

6.9

10.5

10.7

Selling And Marketing [Member]

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

6.4

9.7

8.8

General And Administrative [Member]

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

$ 13.9

17.9

$ 21.0

Restructuring [Member]

Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]

Share-based compensation expenses

$ 0.5

[1]	Most of the Company's share-based compensation relates to its domestic subsidiaries, which have historically experienced recurring net operating losses; therefore, no related tax benefits are recorded.

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Share-Based Compensation (Summary Of Stock Option Plans) (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($) years $ / shares shares
Share-Based Compensation [Abstract]
Number of Shares, Outstanding at December 31, 2010 \| shares	27.4
Weighted-Average Exercise Price, Outstanding at December 31, 2010 \| $ / shares	$ 7.44
Number of Shares, Granted \| shares	1.1
Weighted-Average Exercise Price, Granted \| $ / shares	$ 8.71
Number of Shares, Exercised \| shares	(8.7)
Weighted-Average Exercise Price, Exercised \| $ / shares	$ 6.82
Number of Shares, Cancelled \| shares	(1.1)
Weighted-Average Exercise Price, Cancelled \| $ / shares	$ 9.28
Number of Shares, Outstanding at December 31, 2011 \| shares	18.7
Weighted-Average Exercise Price, Outstanding at December 31, 2011 \| $ / shares	$ 7.70
Outstanding at December 31, 2011 \| years	4.6
Outstanding at December 31, 2011 \| $	$ 19.0
Number of Shares, Exercisable at December 31, 2011 \| shares	14.5
Weighted-Average Exercise Price, Exercisable at December 31, 2011 \| $ / shares	$ 7.80
Weighted-Average Remaining Contractual Term (in years), Exercisable at December 31, 2011 \| years	4.0
Aggregate Intrinsic Value (In-The-Money), Exercisable at December 31, 2011 \| $	$ 15.4

Share-Based Compensation (Additional Information On Stock Options Outstanding) (Details) shares in Millions	12 Months Ended
	Dec. 31, 2011 $ / shares shares
Option Price Less Than Closing Price Of Common Stock At End Of Quarter [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price maximum value, per share	$ 7.72
Number of Shares, Exercisable \| shares	7.4
Weighted Average Exercise Price, Exercisable	$ 5.65
Number of Shares, Unexercisable \| shares	2.3
Weighted Average Exercise Price, Unexercisable	$ 6.12
Number of Shares, Total \| shares	9.7
Weighted Average Exercise Price, Total	$ 5.76
Option Price Above Closing Price Of Common Stock At End Of Quarter [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price minimum value, per share	$ 7.72
Number of Shares, Exercisable \| shares	7.1
Weighted Average Exercise Price, Exercisable	$ 10.03
Number of Shares, Unexercisable \| shares	1.9
Weighted Average Exercise Price, Unexercisable	$ 8.80
Number of Shares, Total \| shares	9.0
Weighted Average Exercise Price, Total	$ 9.77
Total Outstanding [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Exercisable \| shares	14.5
Weighted Average Exercise Price, Exercisable	$ 7.80
Number of Shares, Unexercisable \| shares	4.2
Weighted Average Exercise Price, Unexercisable	$ 7.33
Number of Shares, Total \| shares	18.7
Weighted Average Exercise Price, Total	$ 7.70

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Expected company contribution in 2012		$ 15.3
Rate of return on plan assets in 2012		3.30%
Expected long-term rate of return on plan assets		4.07%	4.75%	5.16%
Total underfunded status		$ 70.9
Expected company contribution in the current period		15.3
Employer contribution on multi-employer plans		0.9
Multi employer pension plans at end		176.4	$ 74.8	$ 68.6
Acquisition Of SANYO Semiconductor Co., Ltd. [Member]
Defined Benefit Plan Disclosure [Line Items]
Acquisition related underfunded pension obligations		50.9
Employer contribution on multi-employer plans		20.0
Acquisition Of SANYO Semiconductor Co., Ltd. [Member] \| Withdrawal From Multiemployer Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Acquisition related underfunded pension obligations		$ 144.9
Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets of foreign plans investment in equity securities		17.00%	67.00%
Assets of foreign plans investment in debt securities		25.00%	9.00%
Assets of foreign plans investment in other investments		56.00%	24.00%
Assets of foreign plans investment in cash		2.00%	0.00%
Compensation expense recognized		$ 2.0	$ 0.4	0.3
Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contribution as percentage of employee contribution		100.00%
Percentage of employee contribution, basis for employer contribution		4.00%
Compensation expense recognized		$ 8.7	$ 7.9	$ 6.5
Multi Employer Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees participate in multi-employer benefit plans		430
Expense on multi-employer plan		$ 44.8
Multi employer pension plans at end		$ 151.0
Multi Employer Pension Plans [Member] \| Withdrawal From Multiemployer Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees participate in multi-employer benefit plans		1,740
SANYO Electric Company Group Defined Benefit Corporate Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of funded status	66.00%
KSS Defined Benefit Corporate Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of funded status	76.00%
SANYO Federation Employee's Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of funded status	86.00%
Tokyo Electric Industry Employee's Pension Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of funded status	89.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of contribution to multi-employer plan		5.00%
Maximum [Member] \| Multi Employer Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of contribution to multi-employer plan		5.00%

Employee Benefit Plans (Summary Of Net Periodic Pension Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee Benefit Plans [Abstract]
Service cost	$ 9.4	$ 3.8	$ 4.0
Interest cost	5.2	3.1	3.6
Expected return on plan assets	(4.0)	(2.8)	(2.6)
Amortization of prior service cost	2.6	1.1	(4.9)
Curtailment loss	2.0
Other losses (gains)	(3.1)		0.3
Total net periodic pension cost	$ 12.1	$ 5.2	$ 0.4
Discount rate	3.50%	4.65%	5.61%
Expected return on plan assets	4.07%	4.75%	5.16%
Rate of compensation increase	4.66%	3.87%	4.06%

Employee Benefit Plans (Summary Of Status Of Foreign Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee Benefit Plans [Abstract]
Projected benefit obligation at the beginning of the year	$ 74.8	$ 68.6
Benefit obligation incurred through acquisition	87.9
Service cost	9.4	3.8	$ 4.0
Interest cost	5.2	3.1	3.6
Net actuarial (gain) or loss	(7.8)	1.5
Benefits paid by plan assets	(3.2)	(1.1)
Curtailments	2.0
Plan amendments	2.6
Translation (gain) or loss and other	5.5	(1.1)
Projected benefit obligation at the end of the year	176.4	74.8	68.6
Accumulated benefit obligation at the end of the year	134.7	56.3
Fair value of plan assets at the beginning of the year	65.9	65.8
Plan assets incurred through acquisition	35.7
Actual return on plan assets	(0.7)	3.3
Benefits paid from plan assets	(3.2)	(1.0)
Employer contributions	5.8	1.4
Translation gain or (loss)	2.0	(3.6)
Fair value of plan assets at the end of the year	105.5	65.9	$ 65.8
Plans with underfunded or non-funded projected benefit obligation, Aggregate accumulated benefit obligation	108.4	38.9
Plans with underfunded or non-funded projected benefit obligation, Aggregate fair value of plan assets	52.0	17.4
Plans with underfunded or non-funded accumulated benefit obligation, Aggregate accumulated benefit obligation	102.2	24.7
Plans with underfunded or non-funded accumulated benefit obligation, Aggregate fair value of plan assets	49.8	7.7
Noncurrent assets	12.4	13.8
Current liabilities	(11.4)	(0.2)
Non-current liabilities	(71.9)	(22.5)
Funded status	(70.9)	(8.9)
Amounts recognized in accumulated other comprehensive income consist of, Prior service cost	$ 0.1	$ 0.2
Discount rate	3.50%	4.65%
Rate of compensation increase	4.66%	3.87%

Employee Benefit Plans (Fair Value Measurement Of Plan Assets) (Details) - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Defined Benefit Plan Disclosure [Line Items]

Plan assets

$ 105.5

$ 65.9

$ 65.8

Percentage of bond securities invested in japan

54.00%

Percentage of equity securities invested in japan

53.00%

Cash/Money Markets [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

$ 2.5

Foreign Government Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

56.1

^[1]

48.1

Agency Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

1.5

Corporate Bonds, Debentures [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

26.7

^[2]

10.8

Equity Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

17.7

^[3]

4.1

Mutual Funds [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

0.3

Real Estate Fund [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

0.1

Insurance Contracts [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

2.1

^[4]

1.0

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

91.5

33.1

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] | Cash/Money Markets [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

2.5

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] | Foreign Government Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

51.5

^[1]

27.6

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] | Corporate Bonds, Debentures [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

21.2

^[2]

3.2

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] | Equity Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

16.0

^[3]

2.0

Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] | Mutual Funds [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

0.3

Significant Observable Inputs (Level 2) [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

8.9

25.3

Significant Observable Inputs (Level 2) [Member] | Foreign Government Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

4.6

^[1]

17.5

Significant Observable Inputs (Level 2) [Member] | Agency Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

1.5

Significant Observable Inputs (Level 2) [Member] | Corporate Bonds, Debentures [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

1.4

^[2]

4.1

Significant Observable Inputs (Level 2) [Member] | Equity Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

1.7

^[3]

2.1

Significant Observable Inputs (Level 2) [Member] | Real Estate Fund [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

0.1

Significant Observable Inputs (Level 2) [Member] | Insurance Contracts [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

^[4]

1.1

Significant Unobservable Inputs (Level 3) [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

5.1

7.5

6.0

Significant Unobservable Inputs (Level 3) [Member] | Foreign Government Securities [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

3.0

Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds, Debentures [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

4.1

^[2]

3.5

2.6

Significant Unobservable Inputs (Level 3) [Member] | Insurance Contracts [Member]

Defined Benefit Plan Disclosure [Line Items]

Plan assets

$ 1.0

^[4]

$ 1.0

[1]	This category includes investments in guaranteed returns securities.
[2]	This category includes investments in government bonds and corporate bonds of developed countries, emerging market government bonds, emerging market corporate bonds and convertible bonds, of which 54% of bond securities were invested in Japan.
[3]	This category includes investments in equity securities of developed countries and emerging markets, of which 53% were invested in Japan.
[4]	This category refers to investments with insurance companies' General Account. The General Account guarantees a minimum rate of return to the investment.

Employee Benefit Plans (Activity Of Plan Assets With Fair Value Measurement Using Significant Unobservable Inputs) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2010 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the beginning of the year	$ 65.8
Fair value of plan assets at the end of the year	65.9
Corporate Bonds, Debentures [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the end of the year	10.8
Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the end of the year	1.0
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the beginning of the year	6.0
Relating to assets still held at the reporting date	0.4
Purchases, sales, and settlements	1.1
Fair value of plan assets at the end of the year	7.5
Significant Unobservable Inputs (Level 3) [Member] \| Foreign Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the beginning of the year	2.4
Purchases, sales, and settlements	0.6
Fair value of plan assets at the end of the year	3.0
Significant Unobservable Inputs (Level 3) [Member] \| Corporate Bonds, Debentures [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the beginning of the year	2.6
Relating to assets still held at the reporting date	0.2
Purchases, sales, and settlements	0.7
Fair value of plan assets at the end of the year	3.5
Significant Unobservable Inputs (Level 3) [Member] \| Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at the beginning of the year	1.0
Relating to assets still held at the reporting date	0.2
Purchases, sales, and settlements	(0.2)
Fair value of plan assets at the end of the year	$ 1.0

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References + Details

Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2011 USD ($)
Employee Benefit Plans [Abstract]
2012	$ 15.3
2013	3.6
2014	3.6
2015	4.0
2016	4.0
Total	$ 30.5

Financial Instruments (Details) - USD ($) $ in Millions	12 Months Ended
Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Financial Instruments [Line Items]
Buy (Sell)	$ 106.6	$ (26.3)
Notional Amount	203.4	75.5
Notional amount of net outstanding foreign exchange contracts in a buy position	203.4	75.5
Realized and unrealized foreign currency transaction losses	8.9	6.9	$ 4.7
Canadian Dollar [Member]
Financial Instruments [Line Items]
Buy (Sell)	1.4
Notional Amount	1.4
Chinese Renminbi [Member]
Financial Instruments [Line Items]
Buy (Sell)	12.8	5.4
Notional Amount	12.8	5.4
Czech Koruna [Member]
Financial Instruments [Line Items]
Buy (Sell)	(6.8)	(7.8)
Notional Amount	6.8	7.8
Euro [Member]
Financial Instruments [Line Items]
Buy (Sell)	30.8	19.2
Notional Amount	30.8	19.2
Indian Rupee [Member]
Financial Instruments [Line Items]
Buy (Sell)	2.8
Notional Amount	2.8
Japanese Yen [Member]
Financial Instruments [Line Items]
Buy (Sell)	100.0	(4.6)
Notional Amount	100.0	4.6
Korean Won [Member]
Financial Instruments [Line Items]
Buy (Sell)	(1.0)	(1.8)
Notional Amount	1.0	1.8
Malaysian Ringgit [Member]
Financial Instruments [Line Items]
Buy (Sell)	(29.4)	(26.1)
Notional Amount	29.4	26.1
Philippine Peso [Member]
Financial Instruments [Line Items]
Buy (Sell)	(5.1)	(7.3)
Notional Amount	5.1	7.3
Singapore Dollar [Member]
Financial Instruments [Line Items]
Buy (Sell)	(2.7)	(3.3)
Notional Amount	2.7	$ 3.3
Thai Bhat [Member]
Financial Instruments [Line Items]
Buy (Sell)	(3.4)
Notional Amount	3.4
Taiwan Dollar [Member]
Financial Instruments [Line Items]
Buy (Sell)	7.2
Notional Amount	$ 7.2

Fair Value Of Financial Instruments (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2011 USD ($)
Fair Value Of Financial Instruments [Abstract]
Short-term investments	$ 248.6
Unrealized losses on securities	$ 0.2

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Demand And Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 455.3	$ 309.4
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		46.1
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	131.1	267.8
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	50.9
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	15.6
Estimate Of Fair Value, Fair Value Disclosure [Member] \| Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Current Assets	0.7	1.1
Liabilities	0.1	0.6
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Demand And Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	455.3	309.4
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		46.1
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	131.1	267.8
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	50.9
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	15.1
Quoted Prices In Active Markets For Identical Assets(Level 1) [Member] \| Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Current Assets	0.7	1.1
Liabilities	$ 0.1	$ 0.6

Fair Value Of Financial Instruments (Carrying Amounts And Fair Values Of Long-Term Borrowings) (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Convertible Notes Payable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	$ 567.1	$ 579.7
Fair Value	683.9	818.0
Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	496.6	160.7
Fair Value	$ 462.0	$ 155.1

Commitments And Contingencies (Narrative) (Details) $ in Millions		1 Months Ended	12 Months Ended
	Dec. 27, 2011 USD ($)	Jul. 27, 2001	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Oct. 06, 2009
Loss Contingencies [Line Items]
Total rent expense			$ 27.7	$ 22.2	$ 20.3
Receivable from Nippon Mining			0.1
Credit commitment outstanding			3.6
Guarantee right to mortgage			3.0
Outstanding guarantees and letters of credit			9.1
Guarantees related to capital lease obligations			118.1
Long-term Debt			1,207.0	$ 888.8
Expected operating leases cash payments and expenses total			$ 93.9
Number of class action lawsuits filed against the company		3
Publicly- traded companies suits have been filed against for class action lawsuit			300
Number of appeals filed objecting to the definition of the settlement class and fairness of settlement						10
Remedial payment on alleged failures of products			$ 20.0
SANYO Electric [Member]
Loss Contingencies [Line Items]
Long-term Debt			$ 339.8
SANYO Semiconductor Thailand [Member]
Loss Contingencies [Line Items]
Lawsuit filing date			December 27, 2011
Number of former employees filed complaints	111
Number of additional former employees filed complaints			4
lawsuits alleged damages, value	$ 17.6

Commitments And Contingencies (Operating Leases Future Minimum Payments Receivable) (Details) $ in Millions	Dec. 31, 2011 USD ($)
Commitments And Contingencies [Abstract]
2012	$ 22.0
2013	17.1
2014	14.1
2015	11.7
2016	12.6
Thereafter	16.4
Total	$ 93.9

Supplemental Disclosure Of Cash Flow Information (Non-Cash Financing Activities And Cash Payments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Disclosure Of Cash Flow Information [Abstract]
Common stock issued for debt repurchase			$ 28.5
Capital expenditures in accounts payable	$ 58.8	$ 69.2	21.4
Equipment acquired or refinanced through capital leases	24.9	69.2	6.6
Interest income	(1.1)	(0.5)	(0.8)
Interest expense	31.8	23.6	26.7
Income taxes	$ 20.4	$ 10.6	$ 8.5

Segment Information (Narrative) (Details) $ in Millions	12 Months Ended
Segment Information (Narrative) (Details) $ in Millions	Dec. 31, 2011 USD ($) customers	Dec. 31, 2010 USD ($) customers	Dec. 31, 2009 USD ($) customers
Segment Reporting Information [Line Items]
Number of segments	4
Operating income (loss)	$ 113.4	$ 374.2	$ 142.6
Number of customers with greater than ten percent of total revenue \| customers	0	1	1
Customers' revenue as a percentage of total revenue	10.00%	13.00%	11.00%
Unallocated Amount To Segment [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	$ 14.9	$ 41.5	$ 24.1

Segment Information (Segment Information Of Revenues, Gross Profit And Operating Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Revenues from external customers	$ 767.9	$ 898.0	$ 905.8	$ 870.6	$ 579.2	$ 600.7	$ 583.3	$ 550.2	$ 3,442.3	$ 2,313.4	$ 1,768.9
Segment gross profit									1,063.8	1,011.8	655.9
Segment operating income (loss)									286.0	498.1	226.8
Computing & Consumer Products Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									609.1	609.1	473.0
Segment gross profit									238.3	257.4	158.7
Segment operating income (loss)									103.0	122.7	45.0
Automotive, Industrial, Medical And Mil-Aero [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									894.7	794.7	623.8
Segment gross profit									450.9	415.3	292.0
Segment operating income (loss)									165.5	154.2	67.2
Standard Products Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									878.2	909.6	672.1
Segment gross profit									295.5	339.1	205.2
Segment operating income (loss)									176.9	$ 221.2	$ 114.6
SANYO Semiconductor Products Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									1,060.3
Segment gross profit									79.1
Segment operating income (loss)									$ (159.4)

Segment Information (Reconciliation Of Operating Profit (Loss) From Segments To Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Information [Abstract]
Gross profit for reportable segments									$ 1,063.8	$ 1,011.8	$ 655.9
Other unallocated manufacturing costs									(55.0)	(55.8)	(35.2)
Gross profit	$ 239.2	$ 261.1	$ 266.1	$ 242.4	$ 237.6	$ 246.5	$ 243.8	$ 228.1	1,008.8	956.0	620.7
Operating income for reportable segments									286.0	498.1	226.8
RestructuringSettlementAndImpairmentProvisions									102.7	10.5	24.9
Goodwill and intangible impairment										(16.1)
Other unallocated operating expenses									(14.9)	(41.5)	(24.1)
Operating income									$ 113.4	$ 374.2	$ 142.6

Segment Information (Revenues By Geographic Location Including Local Sales And Exports) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 767.9	$ 898.0	$ 905.8	$ 870.6	$ 579.2	$ 600.7	$ 583.3	$ 550.2	$ 3,442.3	$ 2,313.4	$ 1,768.9
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									524.0	483.2	374.2
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									36.6	12.3	5.4
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									424.7	373.0	258.2
Belgium [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									3.7	0.7	29.5
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,053.8	762.4	565.4
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									494.8	59.5	51.7
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									683.3	540.8	387.3
Other Asia/Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 221.4	$ 81.5	$ 97.2

Segment Information (Summary Of Property, Plant And Equipment By Geographic Location) (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 1,109.5	$ 864.3
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	257.5	223.7
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	96.7	97.0
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	117.9	104.6
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	164.5	137.4
Other Asia/Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	260.2	178.3
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	130.2	70.8
Belgium [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	70.0	47.8
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 12.5	$ 4.7

Guarantor And Non-Guarantor Statements (Narrative) (Details)	1 Months Ended	12 Months Ended
	Dec. 21, 2005	Dec. 31, 2011	Dec. 31, 2010
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, interest rate		2.625%
Debt instrument, maturity year		2026
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, interest rate	1.875%	1.875%	1.875%
Debt instrument, maturity year	2025	2025	2025
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, interest rate		0.00%
Debt instrument, maturity year		2024	2024
2.625% Convertible Senior Subordinated Notes Due 2026, Series B [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, interest rate		2.625%	2.625%
Debt instrument, maturity year		2026	2026

Guarantor And Non-Guarantor Statements (Notes To Consolidated Statement Of Balance Sheet) (Details) - USD ($)
$ in Millions

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Dec. 31, 2008

Condensed Financial Statements, Captions [Line Items]

Cash and cash equivalents

$ 652.9

$ 623.3

$ 525.7

$ 458.7

Short-term Investments

248.6

Receivables, net

457.2

294.6

Inventories

637.4

360.8

Other current assets

121.6

63.6

Deferred income taxes, net of allowances

10.0

15.7

Total current assets

2,127.7

1,358.0

Restricted cash

142.1

Property, plant and equipment, net

1,109.5

864.3

Deferred income taxes, net of allowances

34.2

Goodwill

198.7

191.2

Intangible assets, net

337.2

303.0

Investments and other assets

76.2

60.6

Total assets

3,883.5

2,919.2

Accounts payable

451.8

256.9

Accrued expenses

239.8

162.6

Income taxes payable

7.5

5.1

Accrued interest

0.7

0.8

Deferred income on sales to distributors

172.0

149.5

Deferred income taxes, net of allowances

33.6

Current portion of long-term debt

370.1

136.0

Total current liabilities

1,275.5

710.9

Long-term debt

836.9

752.8

Other long-term liabilities

260.1

49.3

Deferred income taxes, net of allowances

17.5

18.2

Total liabilities

2,390.0

1,531.2

Common stock

5.0

4.9

Additional paid in capital

3,113.5

3,016.1

Accumulated other comprehensive loss

(46.7)

(59.1)

Accumulated deficit

(1,202.3)

(1,213.9)

Less: treasury stock, at cost

(401.3)

(382.0)

Total ON Semiconductor Corporation stockholders' equity

1,468.2

1,366.0

Minority interest in consolidated subsidiaries

25.3

22.0

Total equity

1,493.5

1,388.0

1,004.6

855.5

Total liabilities and equity

3,883.5

2,919.2

Issuer [Member]

Condensed Financial Statements, Captions [Line Items]

Investments and other assets

^[1]

2,036.2

1,946.6

Total assets

^[1]

2,036.2

1,946.6

Accrued interest

^[1]

0.6

Current portion of long-term debt

^[1]

182.6

Total current liabilities

^[1]

183.2

0.6

Long-term debt

^[1]

384.5

579.7

Intercompany

^[1]

0.3

Total liabilities

^[1]

568.0

580.6

Common stock

^[1]

5.0

4.9

Additional paid in capital

^[1]

3,113.5

3,016.1

Accumulated other comprehensive loss

^[1]

(46.7)

(59.1)

Accumulated deficit

^[1]

(1,202.3)

(1,213.9)

Less: treasury stock, at cost

^[1]

(401.3)

(382.0)

Total ON Semiconductor Corporation stockholders' equity

^[1]

1,468.2

1,366.0

Total equity

^[1]

1,468.2

1,366.0

Total liabilities and equity

^[1]

2,036.2

1,946.6

SCI LLC [Member]

Condensed Financial Statements, Captions [Line Items]

Cash and cash equivalents

304.5

392.3

286.0

213.4

Short-term Investments

248.6

Receivables, net

64.7

47.4

Inventories

36.2

48.0

Other current assets

7.5

14.9

Deferred income taxes, net of allowances

5.5

5.6

Total current assets

667.0

508.2

Restricted cash

142.1

Property, plant and equipment, net

255.2

221.0

Goodwill

125.7

Intangible assets, net

152.3

165.4

Investments and other assets

1,303.5

1,131.2

Total assets

2,503.7

2,293.6

Accounts payable

32.8

43.4

Accrued expenses

61.0

82.1

Income taxes payable

(0.1)

0.9

Deferred income on sales to distributors

43.7

33.7

Current portion of long-term debt

74.1

33.0

Total current liabilities

211.5

193.1

Long-term debt

393.8

103.0

Other long-term liabilities

26.6

21.1

Deferred income taxes, net of allowances

5.5

5.6

Intercompany

(318.2)

(123.8)

Total liabilities

319.2

199.0

Common stock

0.3

Additional paid in capital

2,711.2

2,502.2

Accumulated other comprehensive loss

(46.7)

(59.1)

Accumulated deficit

(480.3)

(348.8)

Total ON Semiconductor Corporation stockholders' equity

2,184.5

2,094.6

Total equity

2,184.5

2,094.6

Total liabilities and equity

2,503.7

2,293.6

Other Subsidiaries [Member]

Condensed Financial Statements, Captions [Line Items]

Cash and cash equivalents

(0.2)

Total current assets

(0.2)

Property, plant and equipment, net

2.3

2.6

Goodwill

37.3

37.2

Investments and other assets

59.1

51.4

Total assets

98.5

91.2

Accounts payable

0.1

Accrued expenses

0.8

Total current liabilities

0.9

Other long-term liabilities

0.4

Intercompany

(54.5)

(53.4)

Total liabilities

(53.2)

(52.1)

Common stock

50.9

Additional paid in capital

238.4

178.5

Accumulated deficit

(137.6)

(86.1)

Total ON Semiconductor Corporation stockholders' equity

151.7

143.3

Total equity

151.7

143.3

Total liabilities and equity

98.5

91.2

Non-Guarantor Subsidiaries [Member]

Condensed Financial Statements, Captions [Line Items]

Cash and cash equivalents

348.6

231.0

$ 239.7

$ 245.3

Receivables, net

392.5

247.2

Inventories

599.3

299.9

Other current assets

114.1

48.7

Deferred income taxes, net of allowances

4.5

10.1

Total current assets

1,459.0

836.9

Property, plant and equipment, net

854.5

644.1

Deferred income taxes, net of allowances

34.2

Goodwill

35.7

28.3

Intangible assets, net

215.0

172.0

Investments and other assets

846.9

830.0

Total assets

3,445.3

2,511.3

Accounts payable

418.9

213.4

Accrued expenses

176.3

78.0

Income taxes payable

7.6

4.2

Accrued interest

0.1

0.2

Deferred income on sales to distributors

128.3

115.8

Deferred income taxes, net of allowances

33.6

Current portion of long-term debt

113.4

103.0

Total current liabilities

878.2

514.6

Long-term debt

58.6

70.1

Other long-term liabilities

233.1

27.8

Deferred income taxes, net of allowances

12.0

12.6

Intercompany

166.9

(28.6)

Total liabilities

1,348.8

596.5

Common stock

146.9

Additional paid in capital

1,359.2

1,110.7

Accumulated other comprehensive loss

(39.2)

(52.3)

Accumulated deficit

629.6

709.5

Total ON Semiconductor Corporation stockholders' equity

2,096.5

1,914.8

Total equity

2,096.5

1,914.8

Total liabilities and equity

3,445.3

2,511.3

Consolidation, Eliminations [Member]

Condensed Financial Statements, Captions [Line Items]

Inventories

1.9

12.9

Total current assets

1.9

12.9

Property, plant and equipment, net

(2.5)

(3.4)

Intangible assets, net

(30.1)

(34.4)

Investments and other assets

(4,169.5)

(3,898.6)

Total assets

(4,200.2)

(3,923.5)

Accrued expenses

1.7

Total current liabilities

1.7

Intercompany

205.5

Total liabilities

207.2

Common stock

(198.1)

Additional paid in capital

(4,308.8)

(3,791.4)

Accumulated other comprehensive loss

85.9

111.4

Accumulated deficit

(11.7)

(274.6)

Total ON Semiconductor Corporation stockholders' equity

(4,432.7)

(4,152.7)

Minority interest in consolidated subsidiaries

25.3

22.0

Total equity

(4,407.4)

(4,130.7)

Total liabilities and equity

$ (4,200.2)

$ (3,923.5)

[1]	ON Semiconductor is a holding Company and has no operations apart from those of its operating subsidiaries. Additionally, ON Semiconductor does not maintain a bank account; rather SCI LLC, its primary domestic operating subsidiary, processes all of its cash receipts and disbursements on its behalf.

Guarantor And Non-Guarantor Statements (Notes To Consolidated Statement Of Operations And Cash Flow) (Details) - USD ($)
$ in Millions

3 Months Ended

12 Months Ended

Dec. 31, 2011

Sep. 30, 2011

Jul. 01, 2011

Apr. 01, 2011

Dec. 31, 2010

Oct. 01, 2010

Jul. 02, 2010

Apr. 02, 2010

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Condensed Financial Statements, Captions [Line Items]

Revenues

$ 767.9

$ 898.0

$ 905.8

$ 870.6

$ 579.2

$ 600.7

$ 583.3

$ 550.2

$ 3,442.3

$ 2,313.4

$ 1,768.9

Cost of product revenues

2,433.5

1,357.4

1,148.2

Gross profit

239.2

261.1

266.1

242.4

237.6

246.5

243.8

228.1

1,008.8

956.0

620.7

Research and development

362.5

248.0

198.8

Selling and marketing

195.1

145.6

120.9

General and administrative

192.4

129.9

104.5

Amortization of acquisition-related intangible assets

42.7

31.7

29.0

Goodwill and intangible asset impairment

16.1

Restructuring, asset impairments and other, net

102.7

10.5

24.9

Total operating expenses

895.4

581.8

478.1

Operating income (loss)

113.4

374.2

142.6

Interest expense

(68.9)

(61.4)

(64.6)

Interest income

1.1

0.5

0.8

Other

(8.9)

(6.9)

(4.7)

Loss on debt repurchase and exchange

(23.2)

(0.7)

(3.1)

Gain (loss) on SANYO Semiconductor acquisition

24.3

Income before income taxes

37.8

305.7

71.0

Income tax provision

(22.9)

(12.8)

(7.7)

Net income

14.9

292.9

63.3

Net income (loss) attributable to minority interests

(3.3)

(2.4)

(2.3)

Net income attributable to ON Semiconductor Corporation

(8.8)

$ (49.4)

$ 34.3

35.5

61.0

$ 87.8

$ 78.7

63.0

11.6

290.5

61.0

Net cash provided by operating activities

545.5

551.8

279.3

Purchases of property, plant and equipment

(316.4)

(188.9)

(55.3)

Purchase of businesses, net of cash acquired

(17.9)

(91.0)

(16.7)

Recovery from insurance on property, plant and equipment

13.3

Proceeds from sales of property, plant and equipment

3.3

37.1

(3.2)

Deposits utilized for purchases of property, plant and equipment

0.5

(2.2)

0.3

Proceeds from held-to-maturity securities

122.2

45.5

52.4

Purchase of held-to-maturity securities

(370.8)

(97.9)

Change in restricted cash

142.1

(136.2)

(5.9)

Net cash used in investing activities

(423.7)

(335.7)

(126.3)

Proceeds from issuance of common stock under the employee stock purchase plan

8.1

7.0

5.5

Proceeds from debt issuance

69.0

152.0

79.5

Proceeds from exercise of stock options

59.4

23.3

17.5

Purchase of treasury stock

(19.3)

(15.0)

(8.6)

Payment of capital lease obligation

(39.0)

(32.3)

(29.5)

Repayment of long term debt

(103.3)

(254.4)

(150.6)

Net cash used in financing activities

(97.2)

(119.4)

(86.2)

Effect of exchange rate changes on cash and cash equivalents

5.0

0.9

0.2

Net increase (decrease) in cash and cash equivalents

29.6

97.6

67.0

Cash and cash equivalents, beginning of period

623.3

525.7

623.3

525.7

458.7

Cash and cash equivalents, end of period

652.9

623.3

652.9

623.3

525.7

Issuer [Member]

Condensed Financial Statements, Captions [Line Items]

Interest expense

^[1]

(50.8)

(52.2)

Loss on debt repurchase and exchange

^[1]

(23.2)

0.1

(3.1)

Gain (loss) on SANYO Semiconductor acquisition

^[1]

(0.1)

Equity in earnings

^[1]

85.7

341.2

116.3

Income before income taxes

^[1]

11.6

290.5

61.0

Net income

^[1]

11.6

290.5

61.0

Net income attributable to ON Semiconductor Corporation

^[1]

11.6

290.5

61.0

SCI LLC [Member]

Condensed Financial Statements, Captions [Line Items]

Revenues

788.9

632.4

512.5

Cost of product revenues

531.5

495.4

399.1

Gross profit

257.4

137.0

113.4

Research and development

167.6

12.1

40.8

Selling and marketing

70.4

67.7

48.0

General and administrative

84.0

19.5

(49.2)

Amortization of acquisition-related intangible assets

18.0

17.1

12.5

Restructuring, asset impairments and other, net

3.4

7.1

3.3

Total operating expenses

343.4

123.5

55.4

Operating income (loss)

(86.0)

13.5

58.0

Interest expense

(8.5)

(6.6)

(6.5)

Interest income

0.4

0.2

0.4

Other

(3.1)

3.2

(1.4)

Loss on debt repurchase and exchange

(0.8)

Gain (loss) on SANYO Semiconductor acquisition

24.4

Equity in earnings

151.6

735.3

72.4

Income before income taxes

78.8

744.8

122.9

Income tax provision

1.5

3.7

5.2

Net income

80.3

748.5

128.1

Net income attributable to ON Semiconductor Corporation

80.3

748.5

128.1

Net cash provided by operating activities

221.1

419.9

(217.3)

Purchases of property, plant and equipment

(69.0)

(59.6)

(9.4)

Purchase of businesses, net of cash acquired

24.3

Proceeds from sales of property, plant and equipment

0.1

37.1

Proceeds from held-to-maturity securities

122.2

Purchase of held-to-maturity securities

(370.8)

Change in restricted cash

142.1

(142.1)

Net cash used in investing activities

(151.1)

(164.6)

(9.4)

Intercompany loans

(289.3)

(666.9)

(123.6)

Intercompany loan repayments

182.2

672.7

501.5

Proceeds from issuance of common stock under the employee stock purchase plan

8.1

7.0

5.5

Proceeds from debt issuance

12.2

33.0

Proceeds from exercise of stock options

59.4

23.3

17.5

Purchase of treasury stock

(19.3)

(15.0)

(8.6)

Payment of capital lease obligation

(36.4)

(29.8)

(23.4)

Repayment of long term debt

(2.6)

(173.3)

(69.6)

Net cash used in financing activities

(157.8)

(149.0)

299.3

Net increase (decrease) in cash and cash equivalents

(87.8)

106.3

72.6

Cash and cash equivalents, beginning of period

392.3

286.0

392.3

286.0

213.4

Cash and cash equivalents, end of period

304.5

392.3

304.5

392.3

286.0

Other Subsidiaries [Member]

Condensed Financial Statements, Captions [Line Items]

Revenues

13.9

14.0

12.1

Cost of product revenues

0.8

1.8

1.7

Gross profit

13.1

12.2

10.4

Research and development

10.7

9.8

8.1

Selling and marketing

1.0

0.9

0.8

General and administrative

0.7

0.8

0.6

Total operating expenses

12.4

11.5

9.5

Operating income (loss)

0.7

0.9

Equity in earnings

7.7

5.5

5.4

Income before income taxes

8.4

6.2

6.3

Net income

8.4

6.2

6.3

Net income attributable to ON Semiconductor Corporation

8.4

6.2

6.3

Net cash provided by operating activities

0.2

Purchases of property, plant and equipment

(0.2)

Net cash used in investing activities

(0.2)

Net increase (decrease) in cash and cash equivalents

(0.2)

Cash and cash equivalents, end of period

(0.2)

Non-Guarantor Subsidiaries [Member]

Condensed Financial Statements, Captions [Line Items]

Revenues

3,985.7

2,850.7

2,291.5

Cost of product revenues

3,236.4

2,051.6

1,794.1

Gross profit

749.3

799.1

497.4

Research and development

184.2

226.1

150.0

Selling and marketing

123.7

77.0

72.1

General and administrative

107.7

109.6

110.7

Amortization of acquisition-related intangible assets

28.8

18.8

19.4

Goodwill and intangible asset impairment

16.1

Restructuring, asset impairments and other, net

99.3

3.4

21.6

Total operating expenses

543.7

451.0

373.8

Operating income (loss)

205.6

348.1

123.6

Interest expense

(9.6)

(4.0)

(5.9)

Interest income

0.7

0.3

Other

(5.8)

(10.1)

(3.3)

Equity in earnings

119.4

Income before income taxes

190.9

334.3

234.1

Income tax provision

(24.4)

(16.5)

(12.9)

Net income

166.5

317.8

221.2

Net income attributable to ON Semiconductor Corporation

166.5

317.8

221.2

Net cash provided by operating activities

324.4

131.7

496.6

Purchases of property, plant and equipment

(247.2)

(129.1)

(45.9)

Purchase of businesses, net of cash acquired

(42.2)

(91.0)

(16.7)

Recovery from insurance on property, plant and equipment

13.3

Proceeds from sales of property, plant and equipment

3.2

(3.2)

Deposits utilized for purchases of property, plant and equipment

0.5

(2.2)

0.3

Proceeds from held-to-maturity securities

45.5

52.4

Purchase of held-to-maturity securities

(97.9)

Change in restricted cash

5.9

(5.9)

Net cash used in investing activities

(272.4)

(170.9)

(116.9)

Intercompany loans

289.3

666.9

123.6

Intercompany loan repayments

(182.2)

(672.7)

(501.5)

Proceeds from debt issuance

56.8

119.0

79.5

Payment of capital lease obligation

(2.6)

(2.5)

(6.1)

Repayment of long term debt

(100.7)

(81.1)

(81.0)

Net cash used in financing activities

60.6

29.6

(385.5)

Effect of exchange rate changes on cash and cash equivalents

5.0

0.9

0.2

Net increase (decrease) in cash and cash equivalents

117.6

(8.7)

(5.6)

Cash and cash equivalents, beginning of period

$ 231.0

$ 239.7

231.0

239.7

245.3

Cash and cash equivalents, end of period

$ 348.6

$ 231.0

348.6

231.0

239.7

Consolidation, Eliminations [Member]

Condensed Financial Statements, Captions [Line Items]

Revenues

(1,346.2)

(1,183.7)

(1,047.2)

Cost of product revenues

(1,335.2)

(1,191.4)

(1,046.7)

Gross profit

(11.0)

7.7

(0.5)

Research and development

(0.1)

General and administrative

42.4

Amortization of acquisition-related intangible assets

(4.1)

(4.2)

(2.9)

Total operating expenses

(4.1)

(4.2)

39.4

Operating income (loss)

(6.9)

11.9

(39.9)

Interest income

0.1

Equity in earnings

(245.0)

(1,082.0)

(313.5)

Income before income taxes

(251.9)

(1,070.1)

(353.3)

Net income

(251.9)

(1,070.1)

(353.3)

Net income (loss) attributable to minority interests

(3.3)

(2.4)

(2.3)

Net income attributable to ON Semiconductor Corporation

(255.2)

$ (1,072.5)

$ (355.6)

2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Condensed Financial Statements, Captions [Line Items]

Repurchase of 2.625% Convertible Senior Subordinated Notes due 2026

56.2

Payments made in connection with exchange of 2.625% convertible senior subordinated notes due 2026

(15.9)

Repayment of long term debt

(56.2)

2.625% Convertible Senior Subordinated Notes Due 2026 [Member] | SCI LLC [Member]

Condensed Financial Statements, Captions [Line Items]

Repurchase of 2.625% Convertible Senior Subordinated Notes due 2026

56.2

Payments made in connection with exchange of 2.625% convertible senior subordinated notes due 2026

$ (15.9)

[1]	ON Semiconductor is a holding Company and has no operations apart from those of its operating subsidiaries. Additionally, ON Semiconductor does not maintain a bank account; rather SCI LLC, its primary domestic operating subsidiary, processes all of its cash receipts and disbursements on its behalf.

Supplementary Data Selected Quarterly Data (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplementary Data Selected Quarterly Data [Abstract]
Revenues	$ 767.9	$ 898.0	$ 905.8	$ 870.6	$ 579.2	$ 600.7	$ 583.3	$ 550.2	$ 3,442.3	$ 2,313.4	$ 1,768.9
Gross Profit	239.2	261.1	266.1	242.4	237.6	246.5	243.8	228.1	1,008.8	956.0	620.7
Net income per common share attributable to ON Semiconductor Corporation	$ (8.8)	$ (49.4)	$ 34.3	$ 35.5	$ 61.0	$ 87.8	$ 78.7	$ 63.0	$ 11.6	$ 290.5	$ 61.0
Diluted net income (loss) per common share attributable to ON Semiconductor Corporation	$ (0.02)	$ (0.11)	$ 0.07	$ 0.08	$ 0.14	$ 0.20	$ 0.18	$ 0.14	$ 0.03	$ 0.65	$ 0.14