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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jul. 01, 2011	Jul. 29, 2011
Document And Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 01, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
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		448,318,913

Consolidated Balance Sheet - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 756.6	$ 623.3
Short-term investments	112.2	0.0
Receivables, net	575.8	294.6
Inventories	749.2	360.8
Other current assets	86.2	63.6
Deferred income taxes, net of allowances	16.9	15.7
Total current assets	2,296.9	1,358.0
Restricted cash	0.0	142.1
Property, plant and equipment, net	1,150.9	864.3
Deferred income taxes, net of allowances	67.4	0.0
Goodwill	199.2	191.2
Intangible assets, net	359.0	303.0
Other assets	76.4	60.6
Total assets	4,149.8	2,919.2
Liabilities, Minority Interests and Stockholders' Equity
Accounts payable	528.9	256.9
Accrued expenses	221.4	162.6
Income taxes payable	3.4	5.1
Accrued interest	0.9	0.8
Deferred income on sales to distributors	187.7	149.5
Deferred income taxes, net of allowances	65.2	0.0
Current portion of long-term debt	286.7	136.0
Total current liabilities	1,294.2	710.9
Long-term debt	998.7	752.8
Other long-term liabilities	247.0	49.3
Deferred income taxes, net of allowances	22.3	18.2
Total liabilities	2,562.2	1,531.2
Commitments and contingencies (See Note 10)
ON Semiconductor Corporation stockholders' equity:
Common stock ($0.01 par value, 750,000,000 shares authorized, 498,334,304 and 485,904,100 shares issued, 448,106,855 and 436,774,177 shares outstanding, respectively)	5.0	4.9
Additional paid-in capital	3,098.0	3,016.1
Accumulated other comprehensive loss	(54.5)	(59.1)
Accumulated deficit	(1,090.3)	(1,213.9)
Less: treasury stock, at cost; 50,227,449 and 49,129,923 shares, respectively	(394.1)	(382.0)
Total ON Semiconductor Corporation stockholders' equity	1,564.1	1,366.0
Minority interests in consolidated subsidiaries	23.5	22.0
Total equity	1,587.6	1,388.0
Total liabilities and equity	$ 4,149.8	$ 2,919.2

Consolidated Balance Sheet (Parenthetical) - $ / shares	Jul. 01, 2011	Dec. 31, 2010
Consolidated Balance Sheet
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	498,334,304	485,904,100
Common stock, shares outstanding	448,106,855	436,774,177
Treasury stock, shares	50,277,449	49,129,923

Consolidated Statements Of Operations And Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Consolidated Statements Of Operations And Comprehensive Income
Revenues	$ 905.8	$ 583.3	$ 1,776.4	$ 1,133.5
Cost of product revenues	639.7	339.5	1,267.9	661.6
Gross profit	266.1	243.8	508.5	471.9
Operating expenses:
Research and development	89.2	60.1	180.3	125.3
Selling and marketing	51.2	36.5	100.6	72.1
General and administrative	52.3	35.3	99.4	66.8
Amortization of acquisition-related intangible assets	11.4	8.1	21.1	15.9
Restructuring, asset impairments and other, net	5.1	2.3	17.5	6.1
Total operating expenses	209.2	142.3	418.9	286.2
Operating income	56.9	101.5	89.6	185.7
Other income (expenses), net:
Interest expense	(17.8)	(14.5)	(35.6)	(30.9)
Interest income	0.2	0.1	0.5	0.2
Other	5.7	(3.4)	5.5	(6.2)
Loss on debt repurchase	0.0	(0.7)	0.0	(0.7)
Gain on SANYO Semiconductor acquisition	0.0	0.0	69.1	0.0
Other income (expenses), net	(11.9)	(18.5)	39.5	(37.6)
Income before income taxes	45.0	83.0	129.1	148.1
Income tax provision	(3.2)	(3.4)	(4.0)	(4.8)
Net income (loss)	41.8	79.6	125.1	143.3
Net income (loss) attributable to minority interests	(0.8)	(0.9)	(1.5)	(1.6)
Net income attributable to ON Semiconductor Corporation	41.0	78.7	123.6	141.7
Comprehensive income:
Net income	41.8	79.6	125.1	143.3
Foreign currency translation adjustments	0.1	2.0	4.4	1.8
Amortization of prior service costs of defined benefit plan	0.0	0.0	0.2	0.0
Comprehensive income	41.9	81.6	129.7	145.1
Comprehensive income attributable to minority interests	(0.8)	(0.9)	(1.5)	(1.6)
Comprehensive income attributable to ON Semiconductor Corporation	$ 41.1	$ 80.7	$ 128.2	$ 143.5
Net income per common share attributable to ON Semiconductor Corporation:
Basic	$ 0.09	$ 0.18	$ 0.28	$ 0.33
Diluted	$ 0.09	$ 0.18	$ 0.27	$ 0.32
Weighted average common shares outstanding:
Basic	446.2	430.3	443.8	429.2
Diluted	461.5	439.6	460.0	439.4

Consolidated Statement Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Cash flows from operating activities:
Net income	$ 125.1	$ 143.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	109.9	80.0
Gain on sale and disposal of fixed assets	(5.1)	(3.7)
Non-cash manufacturing expenses associated with favorable supply agreement	80.4	0.0
Non-cash portion of loss on debt repurchase	0.0	0.7
Gain on acquisition of SANYO Semiconductor	69.1	0.0
Amortization of debt issuance costs and debt discount	1.2	1.4
Provision for excess inventories	3.8	0.1
Non-cash stock compensation expense	20.9	29.1
Non-cash interest	17.6	17.0
Deferred income taxes	(9.2)	3.4
Other	(0.6)	(0.8)
Changes in assets and liabilities (exclusive of the impact of acquisitions):
Receivables	(32.5)	(47.0)
Inventories	43.6	(34.9)
Other assets	4.3	7.0
Accounts payable	(52.2)	30.6
Accrued expenses	(17.3)	18.1
Income taxes payable	(1.7)	(3.2)
Accrued interest	0.1	(0.1)
Deferred income on sales to distributors	38.2	29.0
Other long-term liabilities	4.2	(1.6)
Net cash provided by operating activities	261.6	268.4
Cash flows from investing activities:
Purchases of property, plant and equipment	(173.5)	(93.5)
Purchase of businesses, net of cash acquired	(17.9)	(90.2)
Funds deposited for purchases of property, plant and equipment	0.0	(0.9)
Proceeds from sales of property, plant and equipment	3.3	0.0
Proceeds from held-to-maturity securities	0.0	45.5
Purchases of held-to-maturity securities	(112.2)	0.0
Uses of restricted cash	142.1	0.0
Net cash used in investing activities	(158.2)	(139.1)
Cash flows from financing activities:
Proceeds from issuance of common stock under the employee stock purchase plan	4.0	3.3
Proceeds from debt issuance	41.3	23.2
Proceeds from exercise of stock options	57.1	7.3
Payment of capital lease obligation	(18.6)	(15.3)
Repurchase of treasury stock	(12.1)	(7.0)
Repayment of long-term debt	(43.8)	(199.5)
Net cash provided by (used in) financing activities	27.9	(188.0)
Effect of exchange rate changes on cash and cash equivalents	2.0	0.1
Net increase (decrease) in cash and cash equivalents	133.3	(58.6)
Cash and cash equivalents, beginning of period	623.3	525.7
Cash and cash equivalents, end of period	$ 756.6	$ 467.1

Background And Basis Of Presentation

6 Months Ended

Jul. 01, 2011

Background And Basis Of Presentation

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.

On January 1, 2011, the Company completed the purchase of SANYO Semiconductor Co. Ltd. ("SANYO Semiconductor"), a subsidiary of SANYO Electric Co. Ltd. ("SANYO Electric"), and certain other assets related to SANYO Electric's semiconductor business, whereby SANYO Semiconductor became a wholly-owned subsidiary of the Company (see Note 2: "Acquisitions" for further discussion).

On February 27, 2011, the Company completed the purchase of the CMOS Image Sensor Business Unit ("ISBU") from Cypress Semiconductor Corporation ("Cypress Semiconductor") (see Note 2: "Acquisitions" for further discussion).

The accompanying unaudited financial statements as of July 1, 2011, and for the three and six months ended July 1, 2011 and July 2, 2010, respectively, have been prepared in accordance with generally accepted accounting principles for interim financial information. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for audited financial statements. In the opinion of the Company's management, the interim information includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the results for the interim periods. The footnote disclosures related to the interim financial information included herein are also unaudited. Such financial information should be read in conjunction with the consolidated financial statements and related notes thereto for the year ended December 31, 2010, included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2010 ("2010 Form 10-K"). The results for the interim periods are not necessarily indicative of the results of operations that may be expected for the full year.

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 measurement of valuation allowances relating to trade and tax receivables, inventories and deferred tax assets; estimates of future payouts for customer incentives, warranties, and restructuring activities; assumptions surrounding future pension obligations and related trust returns; the fair value of stock options and of financial instruments (including derivative financial instruments); and future cash flows associated with long-lived assets and goodwill impairment charges. Actual results could differ from these estimates.

- 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
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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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-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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+ Details

Acquisitions

6 Months Ended

Jul. 01, 2011

Acquisitions

Acquisitions

Note 2: 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 ("SCI LLC"), whereby SANYO Semiconductor became a wholly-owned subsidiary of the Company. In the second quarter of 2011, the Company received $39.7 million in cash from SANYO Electric of which $19.0 million had been recognized as of April 1, 2011. These amounts represented adjustments for working capital and pension levels, as defined in the purchase agreement. As a result of these adjustments, the purchase price has been reduced to $479.9 million as of July 1, 2011. The purchase price may be subject to future adjustments, primarily related to pension and related benefit liabilities.

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 extends our custom Application Specific Integrated Circuits ("ASICs") to integrate power modules and motor devices 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 estimated fair values of the net assets acquired of SANYO Semiconductor (in millions):


	Initial Estimate			Adjustments			Revised Estimate
Cash and cash equivalents	$	117.1		$	0		$	117.1
Receivables, net		242.1			0			242.1
Inventory		423.9			(5.0	)		418.9
Deferred income taxes current		0.5			0			0.5
Other current assets		119.2			0			119.2
Property, plant and equipment		148.0			(1.3	)		146.7
Deferred income taxes, noncurrent		60.5			0			60.5
Intangible assets		55.7			0			55.7
Other non-current assets		14.9			0			14.9

Total assets acquired		1,181.9			(6.3	)		1,175.6


Accounts payable		(300.0	)		0			(300.0	)
Deferred income taxes, current		(70.3	)		0			(70.3	)
Other current liabilities		(61.3	)		(6.6	)		(67.9	)
Deferred income taxes, noncurrent		(0.5	)		0			(0.5	)
Long-term accrued liabilities		(187.9	)		0			(187.9	)

Total liabilities assumed		(620.0	)		(6.6	)		(626.6	)
Net assets acquired		561.9			(12.9	)		549.0
Gain on acquisition		(61.3	)		(7.8	)		(69.1	)

Purchase price	$	500.6		$	(20.7	)	$	479.9

The acquisition was accounted for as a business purchase pursuant to Accounting Standards Codification ("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 $69.1 million as reflected in the table above. The increase in the gain is the result of $20.7 million received from SANYO Electric in the second quarter of 2011, as well as certain adjustments to conform to the Company's accounting policies. Consequently, the Company has recorded a $69.1 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 purchase price allocation for the SANYO Semiconductor acquisition is preliminary and is subject to revision pending the receipt of additional information relating to the fair value of assets acquired and liabilities assumed. As of the end of the second quarter, management had not yet completed its evaluation of the fair value of certain assets and liabilities acquired, primarily (i) certain retirement plan liabilities assumed in connection with the SANYO Semiconductor business in Japan. (ii) the final valuation of certain asset retirement obligations identified as a result of the acquisition and (iii) the final valuation of certain income tax accounts. Additional information related to the fair value of the assets acquired and liabilities assumed that is received during the measurement period may have a material impact on the allocation of the purchase price, including values assigned to assets, liabilities and the amount of the gain recognized in connection with the acquisition, which will be adjusted on a retrospective basis.

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-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 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 estimated to be 5 months. The amortization totaled $80.4 million as a result of foreign currency exchange rate changes over the recognition period.

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; these techniques were the income approach, cost approach or market approach, depending upon which was the most appropriate based on the nature and reliability of the data available. 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 assets value of physical, functional and/or economic obsolescence that has occurred with respect to the asset. The market approach is a technique used to estimate value from an analysis of actual transactions or offerings for economically comparable assets available as of the valuation date.

Included in net assets acquired are long-term liabilities representing approximately $46.9 million of assumed underfunded pension obligations relating to existing defined benefit pension plans as well as $136.4 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 following unaudited pro forma consolidated results of operations for the quarter and six months ended July 2, 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):


	For Quarter Ended July 2, 2010		For Six Months Ended July 2, 2010
Net Revenues	$	899.8	$	1,742.4
Net Income	$	56.8	$	155.2
Net income per common share—Basic	$	0.13	$	0.36
Net income per common share—Diluted	$	0.13	$	0.35

Acquisition of the CMOS Image Sensor Business Unit from Cypress Semiconductor

On February 27, 2011, the Company completed the purchase of the ISBU from Cypress Semiconductor, which was accounted for as an acquisition of a business. The Company paid approximately $34.1 million in cash. The ISBU purchased from Cypress Semiconductor 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 initial 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. These valuation techniques were the income approach, cost approach or market approach, depending upon which was the most appropriate based on the nature and reliability of the data available. The income approach is predicated upon the value of 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 a technique used to estimate value from an analysis of actual transactions or offerings for economically comparable assets available as of the valuation date.

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


Cash and cash equivalents	$	1.5
Receivables, net		2.6
Inventory		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

Of the $22.4 million of acquired intangible assets, $11.2 million was assigned to in-process research and development ("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 $8.0 million has been allocated to goodwill. Goodwill represents the excess of the purchase price of an acquired business over the fair value of the underlying net tangible and intangible assets. Among the factors that contributed to a purchase price in excess of the fair value of the net tangible and intangible assets were the potential synergies expected to be derived from combining the ISBU business with the Company's existing sensor business. The Company expects these relationships 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 $8.0 million of goodwill as of July 1, 2011 was assigned to the digital and mixed signal product group, none of which is expected to be deductible for tax purposes.

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

- Definition

Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-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 141
-Paragraph 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
-Paragraph 68
-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 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1392-128463

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1486-128463

+ Details

Goodwill And Intangible Assets

6 Months Ended

Jul. 01, 2011

Goodwill And Intangible Assets

Goodwill And Intangible Assets

Note 3: Goodwill and Intangible Assets

Goodwill

Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the Company's recent and historical acquisitions.

Goodwill is evaluated for potential impairment on an annual basis or whenever events or circumstances indicate that impairment may have occurred. See Part I, Item 2 "Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Goodwill" of this Form 10-Q for information concerning this process. The Company will perform its annual impairment analysis as of the first day of the fiscal fourth quarter of each year unless a triggering event would require an expedited analysis. 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. As of July 1, 2011, there were no triggering events which would require the Company to perform an impairment analysis.

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; because they are one level below the operating segments, they constitute individual businesses and the Company's segment management regularly reviews the operating results of each product family. 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.

A reconciliation of the original goodwill from each of the Company's acquisitions to the carrying value as of July 1, 2011 and December 31, 2010 for each reporting unit that contains goodwill, is as follows (in millions):


Acquisition	Operating Segment	Reporting Unit	Balance as of December 31, 2010										For the Six Months Ended July 1, 2011						Balance as of July 1, 2011
Acquisition	Operating Segment	Reporting Unit	Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value		Goodwill Acquired		Purchase Price Adjustments		Impairment Losses		Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value
Cherry acquisition:
	Automotive & Power Group:
		Analog Automotive	$	21.8	$	(4.2	)	$	0		$	17.6	$	0	$	0	$	0	$	21.8	$	(4.2	)	$	0		$	17.6
	Computing & Consumer Products:
		Signal & Interface		29.1		(5.6	)		0			23.5		0		0		0		29.1		(5.6	)		0			23.5
Leshan additional interest:
	Standard Products:
		Small Signal		3.8		0			0			3.8		0		0		0		3.8		0			0			3.8
AMIS acquisition:
	Digital & Mixed-Signal Product Group:
		Industrial		238.7		0			(214.7	)		24.0		0		0		0		238.7		0			(214.7	)		24.0
		Foundry		146.2		0			(131.4	)		14.8		0		0		0		146.2		0			(131.4	)		14.8
		Medical		79.7		0			(59.9	)		19.8		0		0		0		79.7		0			(59.9	)		19.8
		Military/Aerospace		44.8		0			0			44.8		0		0		0		44.8		0			0			44.8
Catalyst acquisition:
	Standard Products:
		Memory Products		14.1		0			0			14.1		0		0		0		14.1		0			0			14.1
PulseCore acquisition:
	Digital & Mixed-Signal Product Group:
		Protection Products		8.9		0			(8.9	)		0		0		0		0		8.9		0			(8.9	)		0
CMD acquisition:
	Standard Products:
		Filter Products		20.1		0			0			20.1		0		0		0		20.1		0			0			20.1
SDT acquisition:
	Digital & Mixed-Signal Product Group:
		Medical Products		8.7		0			0			8.7		0		0		0		8.7		0			0			8.7
ISBU acquisition:
	Digital & Mixed-Signal Product Group:
		Sensor Products		0		0			0			0		8.0		0		0		8.0		0			0			8.0

			$	615.9	$	(9.8	)	$	(414.9	)	$	191.2	$	8.0	$	0	$	0	$	623.9	$	(9.8	)	$	(414.9	)	$	199.2

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. These are stated at cost less accumulated amortization and are amortized over their economic useful life ranging from less than one 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.

Intangible assets, net were as follows as of July 1, 2011 and December 31, 2010 (in millions):


	July 1, 2011
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.9	)	$	0		$	0		$	6.0		5-12
Assembled workforce		6.7		(6.7	)		0			0			0		5
Customer relationships		280.1		(60.3	)		(27.5	)		(3.2	)		189.1		5-18
Non-compete agreements		0.5		(0.5	)		0			0			0		1-3
Patents		43.7		(7.1	)		0			0			36.6		12
Developed technology		130.0		(29.6	)		0			(2.0	)		98.4		5-12
Trademarks		14.0		(2.5	)		0			0			11.5		15
In-process research and development		19.4		0			0			(2.0	)		17.4		8
Acquired software		1.0		(1.0	)		0			0			0		2
Backlog		0.8		(0.8	)		0			0			0		0.3

Total intangibles	$	510.1	$	(116.4	)	$	(27.5	)	$	(7.2	)	$	359.0


	December 31, 2010
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.0	)	$	0		$	0		$	6.9		5-12
Assembled workforce		6.7		(6.1	)		0			0			0.6		5
Customer relationships		250.5		(51.2	)		(27.2	)		(3.2	)		168.9		5-18
Non-compete agreements		0.5		(0.5	)		0			0			0		1-3
Patents		16.7		(4.2	)		0			0			12.5		12
Developed technology		113.0		(22.5	)		0			(2.0	)		88.5		5-12
Trademarks		11.0		(1.7	)		0			0			9.3		15
In-process research and development		18.3		0			0			(2.0	)		16.3		8
Acquired software		1.0		(1.0	)		0			0			0		2

Total intangibles	$	431.6	$	(94.2	)	$	(27.2	)	$	(7.2	)	$	303.0

Amortization expense for intangible assets amounted to $11.9 million and $22.2 million for the quarter and six months ended July 1, 2011, of which $0.5 million and $1.1 million was included in cost of revenues; and $8.7 million and $17.1 million for the quarter and six months ended July 2, 2010, of which $0.6 million and $1.2 million was included in cost of revenues. The Company is currently amortizing eight projects totaling $15.2 million through developed technology relating to projects that were originally classified as in-process research and development at the time of acquisition, but which are now completed, over a weighted average useful life of 10.0 years. Amortization expense for intangible assets, with the exception of the remaining $17.4 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
Remainder of 2011	$	27.5
2012		40.6
2013		35.9
2014		35.7
2015		34.6
Thereafter		167.3

Total estimated amortization expense	$	341.6

- 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

New Accounting Pronouncements

6 Months Ended

Jul. 01, 2011

New Accounting Pronouncements

New Accounting Pronouncements

Note 4: New Accounting Pronouncements

Accounting Standards Update 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 IFRSs" ("ASU No. 2011-04")

ASU No. 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 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 No. ASU 2011-04 will have on its financial statements.

Accounting Standards Update No. 2011-05—"Comprehensive Income (Topic 220): Presentation of Comprehensive Income" ("ASU No. 2011-05")

ASU No. 2011-05 amends existing guidance by allowing only two options for presenting the components of net income and other comprehensive income: (1) in a single continuous financial statement, statement of comprehensive income or (2) in two separate but consecutive financial statements, consisting of an income statement followed by a separate statement of other comprehensive income. Also, items that are reclassified from other comprehensive income to net income must be presented on the face of the financial statements. ASU No. 2011-05 requires retrospective application, and it is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011 (for the Company this will be its first quarter 2012), with early adoption permitted. The Company believes the adoption of this update will change the order in which certain financial statements are presented and provide additional detail on those financial statements when applicable, but will not have any other impact on its financial statements.

Adoption of Accounting Standards Update No. 2010-17, "Revenue Recognition—Milestone Method"

In April 2010, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2010-17, "Revenue Recognition—Milestone Method," 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"

In December 2010, the FASB issued ASU 2010-29, Business Combinations (Topic 805): Disclosure of Supplementary Pro Forma Information for Business Combinations. 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.

- Definition

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 154
-Paragraph 2, 17, 18
-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 Principles Board Opinion (APB)
-Number 28
-Paragraph 23, 24
-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 Regulation S-X (SX)
-Number 210
-Section 01
-Paragraph b
-Subparagraph 6
-Article 10

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accounting Change
-URI http://asc.fasb.org/extlink&oid=6503790

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.10-01.(b)(6))
-URI http://asc.fasb.org/extlink&oid=6958853&loc=d3e46468-122699

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
-URI http://asc.fasb.org/extlink&oid=6523989

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305

+ Details

Restructuring, Asset Impairments And Other, Net

6 Months Ended

Jul. 01, 2011

Restructuring, Asset Impairments And Other, Net

Restructuring, Asset Impairments And Other, Net

Note 5: Restructuring, Asset Impairments and Other, Net

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, 2010, are as follows:

Restructuring Activities 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 second quarter of 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. As of the end of the second quarter, all of these employees still remain employed by the Company. The Company recorded employee separation charges of approximately $2.5 million related to these terminations. These charges have been included in restructuring, asset impairment and other, net on the consolidated statement of operations for the quarter and six months ended July 1, 2011. We expect that all of these notified individuals will be officially separated and exited from the Company during the third and fourth quarter of 2011, with all related benefit payments being made in the same periods.

Additionally, during the second quarter ended July 1, 2011, the Company recorded exit costs of approximately $0.3 million, related to the decommissioning of the Phoenix, Arizona wafer manufacturing facility.


	Balance at Beginning of Period		Charges		Usage		Adjustments		Balance at End of Period
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011	$	0	$	2.5	$	0	$	0	$	2.5

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0	$	0.3	$	0	$	0	$	0.3

Restructuring Activities Related to the 2011 Acquisition of SANYO Semiconductor

Cumulative charges of $9.9 million, net of adjustments, have been recognized through July 1, 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 2: "Acquisitions" for further discussion). As part of these plans, one assembly and test facility is being consolidated into other existing factories. During the first and second quarter of 2011, a total of 280 employees were terminated and the Company recorded employee separation charges of approximately $8.4 million related to these terminations. These charges have been included in restructuring, asset impairment and other, net on the consolidated statement of operations for the six months ended July 1, 2011.

During the six months ended July 1, 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 to 18 months, the anticipated consolidation and associated costs are still being evaluated. If the Company does proceed with the consolidation, it is likely the Company will incur significant expenses to complete these activities.


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011	$	0	$	8.4	$	(8.4	)	$	0	$	0

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0	$	1.5	$	(1.5	)	$	0	$	0

Restructuring Activities Related to the 2010 Acquisition of California Micro Devices Corporation ("CMD")

Cumulative charges of $3.6 million, net of adjustments, have been recognized through July 1, 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 July 1, 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, all of which have been terminated. All terminations associated with this plan had been completed by the end of the fourth quarter of fiscal 2010, with the related termination benefits anticipated to be paid out by the end of the first quarter of fiscal 2012.

Cumulative exit costs of $0.1 million have been recognized from the inception of this restructuring activity through July 1, 2011, related to charges incurred to terminate certain lease agreements. All payments related to these exit activities are expected to be completed by the end of the third quarter of fiscal 2011.


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation charges (in millions):
December 31, 2010 through July 1, 2011	$	1.0	$	0	$	(0.7	)	$	0	$	0.3

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0.1	$	0	$	0		$	0	$	0.1

Restructuring Activities Related to the 2009 Global Workforce Reduction

Cumulative employee separation charges of $13.0 million, net of adjustments, have been recognized through July 1, 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, all of which had been 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 had been paid out by the end of the first quarter of 2011.


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation charges (in millions):
December 31, 2010 through July 1, 2011	$	0.2	$	0	$	(0.2	)	$	0	$	0

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 six months ended July 1, 2011, the Company paid exit costs associated with the decommissioning costs resulting from the shutdown of a fabrication facility of $0.3 million. All payments related to these activities are expected to be completed by the end of the first quarter of fiscal 2012.


	December 31, 2010		Usage			Adjustments		July 1, 2011
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011		0.2	$	0		$	0	$	0.2

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	9.8	$	(0.3	)	$	0	$	9.5

Other

During the quarter and six months ended July 1, 2011, the Company recorded $2.3 million and $4.8 million, respectively, of other costs associated with damaged inventory and other assets due to the Japanese earthquake and tsunami.

A reconciliation of the activity in the tables above to the "Restructuring, asset impairments and other, net" caption on the consolidated statement of operations for the quarter ended July 1, 2011, is as follows (in millions):


	Quarter Ended July 1, 2011		Six Months Ended July 1, 2011
Restructuring
2011 Charges:
Estimated employee separation charges	$	2.5	$	10.9
Exit costs		0.3		1.8
Other
Assets damaged related to Japanese earthquake		2.3		4.8

	$	5.1	$	17.5

- 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

6 Months Ended

Jul. 01, 2011

Balance Sheet Information

Balance Sheet Information

Note 6: Balance Sheet Information


	July 1, 2011			December 31, 2010
Receivables, net:
Accounts receivable	$	584.2		$	301.9
Less: Allowance for doubtful accounts		(8.4	)		(7.3	)

	$	575.8		$	294.6

Inventories:
Raw materials	$	70.2		$	49.0
Work in process		440.6			210.9
Finished goods		238.4			100.9

	$	749.2		$	360.8

Other Current Assets:
Deposits	$	3.2		$	1.9
Prepaid Expenses		33.3			22.2
Tax Receivables		24.1			14.9
Other		25.6			24.6

	$	86.2		$	63.6

Property, plant and equipment, net:
Land	$	85.0		$	48.3
Buildings		556.2			484.4
Machinery and equipment		1,890.8			1,631.1

Total property, plant and equipment		2,532.0			2,163.8
Less: Accumulated depreciation		(1,381.1	)		(1,299.5	)

	$	1,150.9		$	864.3

Accrued expenses:
Accrued payroll	$	118.3		$	73.1
Sales related reserves		42.6			36.5
Restructuring reserves		12.9			11.3
Accrued pension liability		0.3			0.3
Other		47.3			41.4

	$	221.4		$	162.6

Accumulated other comprehensive loss:
Foreign currency translation adjustments	$	(54.3	)	$	(58.8	)
Unrecognized prior service cost of defined benefit pension plan		(0.2	)		(0.1	)
Prior service cost from pension legal plan amendment		0			(0.2	)

	$	(54.5	)	$	(59.1	)

The activity related to the Company's warranty reserves for the six months ended July 1, 2011 and July 2, 2010, respectively is as follows (in millions):


	Six Months Ended
	July 1, 2011			July 2, 2010
Beginning Balance	$	3.9		$	3.2
Provision		1.2			0.4
Usage		(0.5	)		(0.1	)

Ending Balance	$	4.6		$	3.5

The Company maintains defined benefits plans for some of its foreign subsidiaries. The Company recognizes the aggregate amount of all overfunded plans as an assets and the aggregate amount of all underfunded plans as a liability in its financial statements. As of July 1, 2011, the total accrued pension liability for underfunded plans is $ 76.9 million. Included in this amount is $51.2 million for the SANYO Semiconductor portion of the underfunded pension liability which was assumed by the Company. As of December 31, 2010, the total accrued pension liability for underfunded plans was $22.7 million. As of July 1, 2011 and December 31, 2010, the total pension asset for overfunded plans was $12.2 million and $13.4 million, respectively. The components of the Company's net periodic pension expense for the quarter and six months ended July 1, 2011 and July 2, 2010 are as follows (in millions):


	Quarter Ended						Six Months Ended
	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
Service cost	$	2.1		$	1.0		$	4.4		$	2.0
Interest cost		1.3			0.8			2.6			1.6
Expected return on plan assets		(1.0	)		(0.8	)		(2.0	)		(1.6	)
Amortization of prior service cost		0.1			0.1			0.2			0.2

Total net periodic pension cost	$	2.5		$	1.1		$	5.2		$	2.2

As of July 1, 2011, the estimated liabilities associated with the Company's estimated portion of underfunded pension obligations relating to certain employees participating in certain SANYO Electric multiemployer defined benefit pension plans from which the Company intends to withdraw, were $136.3 million. During the quarter and six months ended July 1, 2011, the Company recorded $2.9 million and $5.8 million of expense associated with the Company's participation in the SANYO Electric multiemployer pension plans.

Long-Term Debt

6 Months Ended

Jul. 01, 2011

Long-Term Debt

Long-Term Debt

Note 7: Long-Term Debt

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


	July 1, 2011			December 31, 2010
U.S. real estate mortgages payable monthly through the first quarter 2016 at an average rate of 4.857%	$	32.4		$	33.0
Loan with a Japanese company due 2011 through 2017, interest payable quarterly at 1.99575%		358.6			0
ZeroCoupon Convertible Senior Subordinated Notes due 2024 ⁽¹⁾		90.8			87.5
1.875% Convertible Senior Subordinated Notes due 2025 ⁽²⁾		85.2			82.2
2.625% Convertible Senior Subordinated Notes due 2026 ⁽³⁾		421.3			410.1
Loan with British finance company, interest payable monthly at 2.57605% and 2.18%, respectively		16.0			13.8
Loan with Hong Kong bank, interest payable weekly at 1.96725% and 2.0325%, respectively		35.0			40.0
Loan with Singapore bank, interest payable weekly at 1.96%		15.0			0
Loans with Philippine banks due 2011 through 2015, interest payable quarterly at an average rate of 1.78401% and 1.80446%, respectively		73.5			68.8
Loans with Chinese banks due 2011 through 2013, interest payable quarterly at an average rate of 4.11040% and 4.23375%, respectively		34.0			34.0
Loans with Japanese banks due 2011 through 2013, interest payable monthly & semi-annually at an average rate of 1.47403% and 1.44545%, respectively		6.2			3.9
Capital lease obligations		117.4			115.5

		1,285.4			888.8
Less: Current maturities		(286.7	)		(136.0	)

	$	998.7		$	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.

Annual maturities relating to the Company's long-term debt as of July 1, 2011 are as follows (in millions):


	Actual Maturities
Remainder 2011		101.2
2012		321.2
2013		513.9
2014		71.5
2015		60.7
Thereafter		216.9

Total	$	1,285.4

June 2011 Philippine Loan

In June 2011, one of the Company's Philippine subsidiaries entered into a $10.0 million short-term loan agreement with a Philippine bank with proceeds to be used for working capital requirements. The loan, which had a balance of $10.0 million as of July 1, 2011, bears interest payable monthly based on 1-month London Interbank Offered Rate ("LIBOR") plus 1.625% per annum. The balance is due in December 2011 unless the loan is renewed.

May 2011 Singapore Loan

In May 2011, one of the Company's Asian subsidiaries entered into a $35.0 million loan agreement with a Singapore bank pursuant to which the bank purchased accounts receivables, with recourse. In accordance with generally accepted accounting principles in the United States, the purchased assets remained on our balance sheet as of July 1, 2011. The loan, which had a balance of $15.0 million as of July 1, 2011, bears interest payable weekly at 1 month Singapore Interbank Offered Rate ("SIBOR") plus 1.75% per annum. The loan amount is subject to an eligible borrowing calculation as defined in the loan agreement.

March 2011 Chinese Loan

In March 2011, one of the Company's Chinese subsidiaries entered into a $7.0 million two year loan agreement with a Chinese bank to finance the purchase of raw materials. The loan which had a balance of $7.0 million as of July 1, 2011, bears interest payable quarterly in arrears based on 3-month London Interbank Offered Rate ("LIBOR") plus 3.80% per annum.

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 $358.6 million as of July 1, 2011. The loan bears interest at a rate of 3-month London Interbank Offered Rate ("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.

January 2011 Japanese Loan

As part of the acquisition of SANYO Semiconductor, one of the Company's newly acquired Japanese subsidiaries has continued with its existing five-year loan agreement with a Japanese bank (450 million JPY principal) to finance capital equipment purchases. The loan, which had a balance of $2.5 million at July 1, 2011 (202.5 million JPY principal), bears interest at an annual rate of 1-month Tokyo Interbank Offered Rate ("TIBOR") plus 1.4% per annum and requires monthly principal payments through September 2013 of approximately $0.1 million (7.5 million JPY principal) along with accrued interest.

Debt Guarantees

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 and the 2.625% Convertible Senior Subordinated Notes due 2026 (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, Sound Design Technologies Ltd. ("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 July 1, 2011
Cash and cash equivalents	$	0	$	489.1		$	0		$	267.5	$	0		$	756.6
Short-term investments		0		112.2			0			0		0			112.2
Receivables, net		0		54.7			0			521.1		0			575.8
Inventories, net		0		50.4			0			691.4		7.4			749.2
Deferred income taxes, current		0		5.6			0			11.3		0			16.9
Other current assets		0		12.6			0			73.6		0			86.2

Total current assets		0		724.6			0			1,564.9		7.4			2,296.9
Property, plant and equipment, net		0		261.0			2.4			890.6		(3.1	)		1,150.9
Deferred income taxes		0		0			0			67.4		0			67.4
Goodwill and other intangible assets		0		287.1			37.2			266.1		(32.2	)		558.2
Investments and other assets		2,162.3		1,516.7			54.8			847.0		(4,504.4	)		76.4

Total assets	$	2,162.3	$	2,789.4		$	94.4		$	3,636.0	$	(4,532.3	)	$	4,149.8

Accounts payable	$	0	$	43.2		$	0.1		$	485.6	$	0		$	528.9
Accrued expenses and other current liabilities		91.4		150.4			0.8			268.1		1.7			512.4
Deferred Tax Liabilities		0		0			0			65.2		0			65.2
Deferred income on sales to distributors		0		42.6			0			145.1		0			187.7

Total current liabilities		91.4		236.2			0.9			964.0		1.7			1,294.2
Long-term debt		506.5		417.9			0			74.3		0			998.7
Other long-term liabilities		0		25.5			0.4			221.1		0			247.0
Deferred Income Taxes		0		5.6			0			16.7		0			22.3
Intercompany		0.3		(207.4	)		(53.9	)		55.5		205.5			0

Total liabilities		598.2		477.8			(52.6	)		1,331.6		207.2			2,562.2
Total ON Semiconductor Corporation stockholders' equity (deficit)		1,564.1		2,311.6			147.0			2,304.4		(4,763.0	)		1,564.1
Minority interests in consolidated subsidiaries		0		0			0			0		23.5			23.5

Total stockholders' equity		1,564.1		2,311.6			147.0			2,304.4		(4,739.5	)		1,587.6

Total liabilities and stockholders' equity	$	2,162.3	$	2,789.4		$	94.4		$	3,638.1	$	(4,532.3	)	$	4,149.8


	Issuer		Guarantor
	ON Semiconductor Corporation ⁽¹⁾		SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2010
Cash and cash equivalents	$	0	$	392.3		$	0		$	231.0		$	0		$	623.3
Receivables, net		0		47.4			0			247.2			0			294.6
Inventories, net		0		48.0			0			299.9			12.9			360.8
Other current assets		0		14.9			0			48.7			0			63.6
Deferred income taxes, net of allowances		0		5.6			0			10.1			0			15.7

Total current assets		0		508.2			0			836.9			12.9			1,358.0
Restricted cash		0		142.1			0			0			0			142.1
Property, plant and equipment, net		0		221.0			2.6			644.1			(3.4	)		864.3
Deferred income taxes		0		0			0			0			0			0
Goodwill and other intangible assets		0		291.1			37.2			200.3			(34.4	)		494.2
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	$	0	$	43.4		$	0.1		$	213.4		$	0		$	256.9
Accrued expenses and other current liabilities		0.6		116.0			0.8			185.4			1.7			304.5
Deferred income on sales to distributors		0		33.7			0			115.8			0			149.5

Total current liabilities		0.6		193.1			0.9			514.6			1.7			710.9
Long-term debt		579.7		103.0			0			70.1			0			752.8
Other long-term liabilities		0		21.1			0.4			27.8			0			49.3
Deferred income taxes, net of allowances		0		5.6			0			12.6			0			18.2
Intercompany		0.3		(123.8	)		(53.4	)		(28.6	)		205.5			0

Total liabilities		580.6		199.0			(52.1	)		596.5			207.2			1,531.2
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		0		0			0			0			22.0			22.0

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

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


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
For the Quarter ended July 1, 2011
Revenues	$	0		$	198.9		$	7.4	$	1,057.5		$	(358	)	$	905.8
Cost of revenues		0			135.5			0.2		865.2			(361.2	)		639.7

Gross profit		0			63.4			7.2		192.3			3.2			266.1

Research and development		0			48.7			2.7		37.8			0			89.2
Selling and marketing		0			17.9			0.3		33			0			51.2
General and administrative		0			22.9			0.3		29.1			0			52.3
Amortization of acquisition related intangible assets		0			4.6			0		7.9			(1.1	)		11.4
Restructuring, asset impairments and other, net		0			2.8			0		2.3			0			5.1

Total operating expenses		0			96.9			3.3		110.1			(1.1	)		209.2

Operating income (loss)		0			(33.5	)		3.9		82.2			4.3			56.9
Interest expense, net		(13.1	)		(1.7	)		0		(2.8	)		0			(17.6	)
Other		0			(0.8	)		0		6.5			0			5.7
Gain (loss) on debt prepayment		0			0			0		0			0			0
Gain (loss) on acquisition		0			0.1			0		(0.1	)		0			0
Equity in earnings		54.1			91.1			1.8		0			(147.0	)		0

Income (loss) before income taxes and minority interests		41.0			55.2			5.7		85.8			(142.7	)		45.0
Income tax provision		0			10.1			0		(13.3	)		0			(3.2	)

Net income (loss)		41.0			65.3			5.7		72.5			(142.7	)		41.8
Net income (loss) attributable to minority interest		0			0			0		0			(0.8	)		(0.8	)

Net income (loss) attributable to ON Semiconductor	$	41.0		$	65.3		$	5.7	$	72.5		$	(143.5	)	$	41.0


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the Quarter ended July 2, 2010
Revenues	$	0		$	167.6		$	0		$	729.8		$	(314.1	)	$	583.3
Cost of revenues		0			119.1			0.6			538.2			(318.4	)		339.5

Gross profit		0			48.5			(0.6	)		191.6			4.3			243.8

Research and development		0			10.4			2.2			47.5			0			60.1
Selling and marketing		0			15.0			0.2			21.3			0			36.5
General and administrative		0			5.7			0.2			29.4			0			35.3
Amortization of acquisitions related intangible assets		0			4.2			0			4.9			(1.0	)		8.1
Restructuring, asset impairments and other, net		0			0			0			2.3			0			2.3

Total operating expenses		0			35.3			2.6			105.4			(1.0	)		142.3

Operating income (loss)		0			13.2			(3.2	)		86.2			5.3			101.5
Interest expense, net		(12.5	)		(1.7	)		0			(0.2	)		0			(14.4	)
Loss on debt repurchase		0			(0.7	)		0			0			0			(0.7	)
Other		0.1			(0.8	)		0			(2.7	)		0			(3.4	)
Equity in earnings		91.1			76.8			2.3			0			(170.2	)		0

Income (loss) before income taxes and minority interests		78.7			86.8			(0.9	)		83.3			(164.9	)		83.0
Income tax provision		0			2.0			0			(5.4	)		0			(3.4	)
Minority interests		0			0			0			0			0			0

Net income (loss)		78.7			88.8			(0.9	)		77.9			(164.9	)		79.6
Net income (loss) attributable to minority interest		0			0			0			0.1			(1.0	)		(0.9	)

Net income (loss) attributable to ON Semiconductor	$	78.7		$	88.8		$	(0.9	)	$	78.0		$	(165.9	)	$	78.7


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation (1)			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the six months ended July 1, 2011
Revenues	$	0		$	398.7		$	7.5		$	2,069.3		$	(699.1	)	$	1,776.4
Cost of revenues		0			271.8			0.5			1,689.7			(694.1	)		1,267.9

Gross profit		0			126.9			7.0			379.6			(5.0	)		508.5

Research and development		0			93.8			5.6			80.9			0			180.3
Selling and marketing		0			36.9			0.5			63.2			0			100.6
General and administrative		0			49.4			0.4			49.6			0			99.4
Amortization of acquisition related intangible assets		0			9.1			0			14.1			(2.1	)		21.1
Restructuring, asset impairments and other, net		0			2.8			0			14.7			0			17.5

Total operating expenses		0			192.0			6.5			222.5			(2.1	)		418.9

Operating income (loss)		0			(65.1	)		0.5			157.1			(2.9	)		89.6
Interest expense, net		(26.0	)		(3.8	)		0			(5.3	)		0			(35.1	)
Other		0			3.4			0			2.1			0			5.5
Gain (loss) on acquisition		0			69.2			0			(0.1	)		0			69.1
Equity in earnings		149.6			133.5			3.5			0			(286.6	)		0

Income (loss) before income taxes and minority interests		123.6			137.2			4.0			153.8			(283.7	)		129.1
Income tax provision		0			11.1			0			(15.1	)		0			(4.0	)

Net income (loss)		123.6			148.3			4.0			138.7			(283.7	)		125.1
Net income (loss) attributable to minority interest		0			0			0			0			(1.5	)		(1.5	)

Net income (loss) attributable to ON Semiconductor Corporation	$	123.6		$	148.3		$	4.0		$	138.7		$	(282.2	)	$	123.6

Net cash provided by operating activities	$	0		$	(157.7	)	$	0.1		$	419.2		$	0		$	261.6

Cash flows from investing activities:
Purchases of property, plant and equipment		0			(42.8	)		(0.1	)		(130.6	)					(173.5	)
Funds deposited for purchases of property, plant and equipment		0			0			0			0			0			0
Proceeds from sales of held-to-maturity securities 2		0			0			0			0			0			0
Purchase of a business, net of cash acquired		0			69.1			0			(87	)		0			(17.9	)
Increase in restricted cash		0			142.1			0			0			0			142.1
Proceeds from sales of property, plant and equipment		0			0.1			0			3.2			0			3.3
Purchases of held-to-maturity securities		0			(112.2	)		0			0			0			(112.2	)

Net cash used in investing activities		0			56.3			(0.1	)		(214.4	)		0			(158.2	)

Cash flows from financing activities:
Intercompany loans		0			(89.9	)		0			89.9			0			0
Intercompany loan repayments		0			258.1			0			(258.1	)		0			0
Proceeds from debt issuance		0			0			0			41.3						41.3
Proceeds from issuance of common stock under the employee stock purchase plan		0			4.0			0			0			0			4.0
Proceeds from exercise of stock options					57.1			0			0			0			57.1
Repurchase of Treasury Stock		0			(12.1	)		0			0			0			(12.1	)
Dividends to minority shareholder of consolidated subsidiary		0			0			0			0			0			0
Equity injections from Parent		0			0			0			0			0			0
Subsidiary declared dividend		0			0			0			0			0			0
Payment of capital lease obligation		0			(18.4	)		0			(0.2	)		0			(18.6	)
Repayment of long term debt		0			(0.6	)		0			(43.2	)		0			(43.8	)

Net cash used in financing activities		0			198.2			0			(170.3	)		0			27.9

Effect of exchange rate changes on cash and cash equivalents		0			0			0			2.0			0			2.0

Net increase (decrease) in cash and cash equivalents		0			96.8			0			36.5			0			133.3
Cash and cash equivalents, beginning of period		0			392.3			0			231.0			0			623.3

Cash and cash equivalents, end of period	$	0		$	489.1		$	0		$	267.5		$	0		$	756.6


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the six months ended July 2, 2010
Revenues	$	0		$	339.7		$	0		$	1,421.1		$	(627.3	)	$	1,133.5
Cost of revenues		0			231.1			1.3			1,056.9			(627.7	)		661.6

Gross profit		0			108.6			(1.3	)		364.2			0.4			471.9

Research and development		0			23.6			4.7			97.0			0			125.3
Selling and marketing		0			29.6			0.4			42.1			0			72.1
General and administrative		0			8.0			0.4			58.4			0			66.8
Amortization of acquisition related intangible assets		0			8.2			0			9.7			(2.0	)		15.9
Restructuring, asset impairments and other, net		0			0			0			6.1			0			6.1

Total operating expenses		0			69.4			5.5			213.3			(2.0	)		286.2

Operating income (loss)		0			39.2			(6.8	)		150.9			2.4			185.7
Interest expense, net		(25.6	)		(4.5	)		0			(0.6	)		0			(30.7	)
Loss on debt repurchase		0			(0.7	)		0			0			0			(0.7	)
Other		0.1			0			0			(6.3	)		0			(6.2	)
Equity in earnings		167.2			120.1			3.8			0			(291.1	)		0

Income (loss) before income taxes and minority interests		141.7			154.1			(3.0	)		144.0			(288.7	)		148.1
Income tax provision		0			7.3			0			(12.1	)		0			(4.8	)

Net income (loss)		141.7			161.4			(3.0	)		131.9			(288.7	)		143.3
Net income (loss) attributable to minority interest		0			0			0			0.1			(1.7	)		(1.6	)

Net income (loss) attributable to ON Semiconductor Corporation	$	141.7		$	161.4		$	(3.0	)	$	132.0		$	(290.4	)	$	141.7

Net cash provided by operating activities	$	0		$	123.9		$	0		$	144.5		$	—		$	268.4

Cash flows from investing activities:
Purchases of property, plant and equipment		0			(28.3	)		0			(65.2	)		0			(93.5	)
Funds deposited for purchases of property, plant and equipment		0			0			0			(0.9	)		0			(0.9	)
Proceeds from sales of held-to-maturity securities		0			0			0			45.5			0			45.5
Purchase of a business, net of cash acquired		0			0			0			(90.2	)		0			(90.2	)
Proceeds from sales of property, plant and equipment		0			0			0			0			0			0

Net cash used in investing activities		0			(28.3	)		0			(110.8	)		0			(139.1	)

Cash flows from financing activities:
Intercompany loans		0			(358.1	)		0			358.1			0			0
Intercompany loan repayments		0			282.9			0			(282.9	)		0			0
Proceeds from debt issuance		0			0			0			23.2			0			23.2
Proceeds from issuance of common stock under the employee stock purchase plan		0			3.3			0			0			0			3.3
Proceeds from exercise of stock options					7.3			0			0			0			7.3
Repurchase of Treasury Stock		0			(7.0	)		0			0			0			(7.0	)
Payment of capital lease obligation		0			(13.0	)		0			(2.3	)		0			(15.3	)
Repayment of long term debt		0			(173.4	)		0			(26.1	)		0			(199.5	)

Net cash used in financing activities		0			(258.0	)		0			70.0			0			(188.0	)

Effect of exchange rate changes on cash and cash equivalents		0			0			0			0.1			0			0.1

Net increase (decrease) in cash and cash equivalents		0			(162.4	)		0			103.8			0			(58.6	)
Cash and cash equivalents, beginning of period		0			286.0			0			239.7			0			525.7

Cash and cash equivalents, end of period	$	0		$	123.6		$	0		$	343.5		$	0		$	467.1

(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 10: "Commitments and Contingencies—Other Contingencies" for further discussion of the Company's 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

Equity

6 Months Ended

Jul. 01, 2011

Equity

Equity

Note 8: Equity

Income per share calculations for the quarter and six months ended July 1, 2011 and July 2, 2010 respectively, are as follows (in millions, except per share data):


	Quarter Ended				Six Months Ended
	July 1, 2011		July 2, 2010		July 1, 2011		July 2, 2010
Net income applicable to ON Semiconductor Corporation	$	41.0	$	78.7	$	123.6	$	141.7

Basic weighted average common shares outstanding		446.2		430.3		443.8		429.2
Add: Incremental shares for:
Dilutive effect of stock options and awards		9.1		9.3		10.0		10.2
1.875% Convertible Senior Subordinated Notes		4.7		0		4.7		0
2.625% Convertible Senior Subordinated Notes		0.7		0		0.7		0
ZeroConvertible Coupon Senior Subordinated Notes		0.8		0		0.8		0

Diluted weighted average common shares outstanding		461.5		439.6		460.0		439.4

Income per common share attributable to ON Semiconductor Corporation
Basic:	$	0.09	$	0.18	$	0.28	$	0.33

Diluted:	$	0.09	$	0.18		0.27	$	0.32

Basic income (loss) per share is computed by dividing net income by the weighted average number of common shares outstanding during the period.

The number of incremental shares from the assumed exercise of stock options is calculated by applying the treasury stock method. Common shares relating to employee stock options where the exercise price exceeded the average market price of the Company's common shares or the assumed exercise would have been anti-dilutive were excluded from the diluted earnings per share calculation. The excluded option shares were 5.0 million and 14.4 million for the quarters ended July 1, 2011 and July 2, 2010, respectively, and 5.6 million and 14.0 million for the six months ended July 1, 2011 and July 2, 2010, respectively.

For the quarter and six months ended July 2, 2010, the shares issuable upon the assumed conversion of the Zero Coupon Convertible Senior Subordinated Notes due 2024 were excluded in determining diluted net income per share. The Zero Coupon Convertible Senior Subordinated Notes were convertible into cash up to the par value of $99.4 million, based on a conversion price of $9.82 per share at July 2, 2010. The excess of fair value over par value is convertible into stock. On July 2, 2010, the Company's common stock traded below $9.82; thus, the effects of an assumed conversion would have been anti-dilutive and therefore were excluded.

For the quarter and six months ended July 2, 2010, the shares issuable upon the assumed conversion of the 1.875% convertible senior subordinated notes due 2025 were excluded in determining diluted net income per share. The 1.875% convertible senior subordinated notes due 2025 were convertible into cash up to the par value of $95.0 million, based on a conversion price of $7.00 per share at July 2, 2010. The excess of the fair value over par value is convertible into stock. On July 2, 2010, the Company's common stock traded below $7.00; thus, the effects of an assumed conversion would have been anti-dilutive and therefore were excluded.

For the quarter and six months ended July 2, 2010, the shares issuable upon the assumed conversion of the 2.625% convertible senior subordinated notes were excluded in determining diluted net income per share. The 2.625% convertible senior subordinated notes were convertible into cash up to the par value of $484.0 million, based on a conversion price of $10.50 per share. The excess of the fair value over par value is convertible into stock. On July 2, 2010, the Company's common stock traded below $10.50; thus, the effects of an assumed conversion would have been anti-dilutive and therefore were excluded.

Additionally, warrants held by non-employees to purchase 5.3 million shares of the Company's common stock, which were obtained from the AMIS acquisition, were outstanding as of July 1, 2011, but were not included in the computation of diluted net income per share as the effect would have been anti-dilutive under the treasury stock method.

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 quarter ended July 1, 2011 were $4.5 million for which the Company withheld 402,150 shares of common stock that were underlying the restricted stock units that vested. None of these shares had been reissued or retired as of July 1, 2011, but may be reissued or retired by the Company at a later date.

At December 31, 2010, the minority interest balance was $22.0 million. This balance increased to $23.5 million at July 1, 2011, due to the minority interest's $1.5 million share of the earnings for the quarter, which has been reflected in the Company's consolidated statement of operations for the quarter ended July 1, 2011.

At December 31, 2009, the minority interest balance was $19.6 million. This balance increased to $21.2 million at July 2, 2010 due to the minority interest's $0.9 million and $1.6 million share of the earnings for the quarter and six months, respectively, which has been reflected in the Company's consolidated statement of operations for the quarter ended July 2, 2010.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
-Section 04
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Number 43
-Chapter 1
-Section B
-Paragraph 7, 11A
-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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+ Details

Employee Stock Benefit Plans

6 Months Ended

Jul. 01, 2011

Employee Stock Benefit Plans

Employee Stock Benefit Plans

Note 9: Employee Stock Benefit Plans

At December 31, 2010, there was an aggregate of 24.4 million shares of common stock available for grant under the Company's Amended and Restated Stock Incentive Plan ("Plan"), and at July 1, 2011, there was an aggregate of 19.1 million shares of common stock available for grant under the Company's Plan.

Stock Options

The weighted-average estimated fair value of stock options granted during the quarter and six months ended July 1, 2011 was $4.28 per share and $4.23 per share, respectively. The weighted-average estimated fair value of stock options granted during the quarter and six months ended July 2, 2010 was $2.94 per share and $3.09 per share, respectively. The weighted-average assumptions associated with the stock options granted during the periods are as follows:


	Quarter Ended
	July 1, 2011			July 2, 2010
Volatility		45.1	%		48.5	%
Risk-free interest rate		2.0	%		2.2	%
Expected term		4.9 years			4.9 years

	Six Months Ended
	July 1, 2011			July 2, 2010
Volatility		42.1	%		47.4	%
Risk-free interest rate		2.1	%		2.3	%
Expected term		4.9 years			5.1 years

Pre-vesting forfeitures were estimated to be approximately 12.0% for the quarter and six months ended July 1, 2011, and 12.0% for the quarter and six months ended July 2, 2010, based on historical experience.

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


	Six Months Ended July 1, 2011
	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (In The Money)
Outstanding at December 31, 2010		27.4		$	7.44
Granted		0.3			10.82
Exercised		(8.3	)		6.90
Cancelled		(0.4	)		8.34

Outstanding at July 1, 2011		19.0		$	7.70		4.9	$	59.9

Exercisable at July 1, 2011		14.8		$	7.85		4.3	$	45.3

Additional information about stock options outstanding at July 1, 2011 with exercise prices less than or above $10.67 per share, the closing price of the Company's common stock at July 1, 2011, is as 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 $10.67		12.8	$	7.13		4.0	$	6.99		16.8	$	7.09
Above $10.67		2.0		12.47		0.2		11.19		2.2		12.35

Total outstanding		14.8	$	7.85		4.2	$	7.20		19.0	$	7.70

Restricted Stock Units and Awards

Restricted stock units that vest over three to four years with service-based requirements as well as restricted stock units that vest based on performance-based requirements are payable in shares of the Company's common stock upon vesting. The following table presents a summary of the status of the Company's restricted stock units granted to certain officers, directors, and employees of the Company as of July 1, 2011 and changes during the six months ended July 1, 2011 (number of shares in millions):


	Six Months Ended July 1, 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		3.9			10.70
Released		(3.5	)		4.91
Forfeited		(0.8	)		7.97

Nonvested shares of restricted stock units at July 1, 2011		11.9		$	6.88

Stock Grant Awards

During the six months ended July 1, 2011, the Company granted 0.1 million shares in stock grant awards with a weighted average grant date fair value of $10.55 per share to non-executive members of the Board of Directors. The awards vested and shares of common stock were issued immediately upon the effective date of the grant.

Employee Stock Purchase Plans

As of July 1, 2011, there were 4.7 million shares available for issuance under the 2000 Employee Stock Purchase Plan ("ESPP"). The weighted-average fair value of shares issued under the ESPP during the quarter and six months ended July 1, 2011 was $2.11 per share and $2.07 per share, respectively. The weighted-average fair value of shares issued under the ESPP during the quarter and six months ended July 2, 2010 was $1.82 per share and $1.95 per share, respectively. The weighted-average assumptions used in the pricing model are as follows:


	Quarter Ended						Six Months Ended
Employee Stock Purchase Plan	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
Expected life (in years)		0.25			0.25			0.25			0.25
Risk-free interest rate		0.1	%		0.2	%		0.1	%		0.1	%
Volatility		34.0	%		38.0	%		31.0	%		42.0	%

Share-Based Compensation Expense

Total share-based compensation expense, related to the Company's stock options, restricted stock units, restricted stock awards, stock grant awards, and employee stock purchase plan, recognized for the quarter and six months ended July 1, 2011 and July 2, 2010, respectively, was comprised as follows (in millions):


	Quarter Ended				Six Months Ended
	July 1, 2011		July 2, 2010		July 1, 2011		July 2, 2010
Cost of revenues	$	1.7	$	3.3	$	3.6	$	6.6
Research and development		1.9		2.7		3.9		5.2
Selling and marketing		1.7		2.0		3.6		4.6
General and administrative		5.2		7.0		9.8		12.3
Restructuring		0		0.4		0		0.4

Share-based compensation expense before income taxes	$	10.5	$	15.4	$	20.9	$	29.1

Related income tax benefits⁽¹⁾		0		0		0		0

Share-based compensation expense, net of taxes	$	10.5	$	15.4	$	20.9	$	29.1

(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 July 1, 2011, total unrecognized share-based compensation expense, net of estimated forfeitures, related to non-vested stock options and non-vested restricted stock units granted prior to that date was $8.9 million and $33.2 million, respectively. The total intrinsic value of stock options exercised during the quarter and six months ended July 1, 2011 was $11.0 million and $34.5 million, respectively. The Company recorded cash received from the exercise of stock options of $16.0 million and $57.1 million and cash from issuance of shares under the ESPP of $2.1 million and $4.0 million and recorded no related tax benefits during the quarter and six months ended July 1, 2011, respectively. The Company issues new shares of stock upon the exercise of stock options, restricted stock units vesting and the completion of a purchase under the ESPP.

- Definition

Tabular disclosure of the description of the plan, the basis for determining contributions, including the employee groups covered, and the nature and effect of significant matters affecting comparability of information for all periods presented. For leveraged ESOPs and pension reversion ESOPs, the disclosure may include the basis for releasing shares and how dividends on allocated and unallocated shares are used. Disclosure may also include a description of the accounting policies followed for ESOP transactions, including the method of measuring compensation, the classification of dividends on ESOP shares, and the treatment of ESOP shares for EPS computations. If the employer has both old ESOP shares for which it does not adopt the latest guidance and new ESOP shares for which the new guidance is required, the accounting policies for both blocks of shares may be described. Disclosure may also include he amount of compensation cost recognized during the period, the number of allocated shares, committed-to-be-released shares, and suspense shares held by the ESOP at the balance-sheet date, the fair value of unearned ESOP shares at the balance-sheet date for shares accounted for under the latest guidance, the existence and nature of any repurchase obligation, including disclosure of the fair value of the shares allocated as of the balance sheet date, which are subject to a repurchase obligation.

+ References + Details

Commitments And Contingencies

6 Months Ended

Jul. 01, 2011

Commitments And Contingencies

Commitments And Contingencies

Note 10: Commitments and Contingencies

Leases

The following is a schedule by year of future minimum lease obligations under non-cancelable operating leases as of July 1, 2011 (in millions):


Remainder of 2011	$	13.5
2012		25.1
2013		20.1
2014		17.5
2015		15.7
Thereafter		30.9

Total⁽¹⁾	$	122.8

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 has 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 July 1, 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 to be indemnified for remediation costs, subject to certain limitations, by the prior owner pursuant to an agreement between the Company and the prior owner. 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 $3.8 million as of July 1, 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 July 1, 2011. The Company also has outstanding guarantees and letters of credit outside of its non-reusable commitment credit totaling $9.3 million as of July 1, 2011.

As part of securing financing in the normal course of business, the Company issued guarantees related to its capital lease obligations and real estate mortgages which totaled approximately $129.7 million as of July 1, 2011. For its operating leases, the Company expects to make cash payments and similarly incur expenses totaling $122.8 million as payments come due. The Company had 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 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 things, 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 advisors 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 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 have defended, and intend 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.

On July 15, 2002, together with the other issuer defendants, the Company filed a collective motion to dismiss the consolidated, amended complaints against the issuers on various legal grounds common to all or most of the issuer defendants. The underwriters also filed separate motions to dismiss the claims against them. In addition, the parties have stipulated to the voluntary dismissal without prejudice of the Company's individual former officers and current and former directors who were named as defendants in the Company's litigation, and they are no longer parties to the litigation. On February 19, 2003, the District Court issued its ruling on the motions to dismiss filed by the underwriter and issuer defendants. In that ruling, the District Court granted in part and denied in part those motions. As to the claims brought against the Company under the antifraud provisions of the securities laws, the District Court dismissed all of these claims with prejudice, and refused to allow plaintiffs the opportunity to re-plead these claims. As to the claims brought under the registration provisions of the securities laws, which do not require that intent to defraud be pleaded, the District Court denied the motion to dismiss these claims as to the Company and as to substantially all of the other issuer defendants as well. The District Court also denied the underwriter defendants' motion to dismiss in all respects.

In June 2003, upon the determination of a special independent committee of the Company's Board of Directors, the Company elected to participate in a proposed settlement with the plaintiffs in this litigation. Had it been approved by the District Court, this proposed settlement would have resulted in the dismissal, with prejudice, of all claims in the litigation against the Company and against any of the other issuer defendants who elected to participate in the proposed settlement, together with the current or former officers and directors of participating issuers who were named as individual defendants. This proposed issuer settlement was conditioned on, among other things, a ruling by the District Court that the claims against the Company and against the other issuers who had agreed to the settlement would be certified for class action treatment for purposes of the proposed settlement, such that all investors included in the proposed classes in these cases would be bound by the terms of the settlement unless an investor opted to be excluded from the settlement in a timely and appropriate fashion.

On December 5, 2006, the U.S. Court of Appeals for the Second Circuit ("Court of Appeals") issued a decision in In re Initial Public Offering Securities Litigation that six purported class action lawsuits containing allegations substantially similar to those asserted against the Company could not be certified as class actions due, in part, to the Court of Appeals' determination that individual issues of reliance and knowledge would predominate over issues common to the proposed classes. On January 8, 2007, the plaintiffs filed a petition seeking rehearing en banc of this ruling. On April 6, 2007, the Court of Appeals denied the plaintiffs' petition for rehearing of the Court of Appeals' December 5, 2006 ruling. The Court of Appeals, however, noted that the plaintiffs remained free to ask the District Court to certify classes different from the ones originally proposed which might meet the standards for class certification that the Court of Appeals articulated in its December 5, 2006 decision. In light of the Court of Appeals' December 5, 2006 decision regarding certification of the plaintiffs' claims, the District Court entered an order on June 25, 2007 terminating the proposed settlement between the plaintiffs and the issuers, including the Company.

On August 14, 2007, the plaintiffs filed amended complaints in the six focus cases. The issuer defendants and the underwriter defendants separately moved to dismiss the claims against them in the amended complaints in the six focus cases. On March 26, 2008, the District Court issued an order in which it denied in substantial part the motions to dismiss the amended complaints in the six focus cases.

On February 25, 2009, the parties advised the District Court 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, five of which have been dismissed with prejudice. On May 17, 2011, the Court of Appeals dismissed four of the remaining appeals and remanded the final appeal to the District Court to determine whether the appellant has standing to object to the settlement. The District Court has yet to rule on that issue. The settlement calls for a total payment of $586 million from all defendants, including underwriters, of which $100 million is allocated to the approximately 300 issuer defendants. Under the settlement, the Company's insurers are to pay the full amount of the settlement share allocated to it, and the Company would bear no financial liability. The Company, as well as the officer and director defendants (current and former) who were previously dismissed from the action pursuant to tolling agreements, are to receive complete dismissals from the case. While the Company can make no assurances or guarantees as to the outcome of these proceedings, based upon the Company's current knowledge, the Company believes that the final result of this action will have no material effect on the Company's consolidated financial position, results of operations or cash flows.

Other Litigation Matter

On December 15, 2010, a lawsuit was filed in the United States District Court for the District of Delaware 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 has moved to dismiss the lawsuit. The Company denies the substantive allegations made in the lawsuit and intends to continue to vigorously defend against them. 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.

See Part I, Item 1 "Business-Government Regulation" of the 2010 Form 10-K for information on certain environmental matters.

- Definition

The entire disclosure for commitments and contingencies.

+ References

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

Fair Value Of Financial Instruments

6 Months Ended

Jul. 01, 2011

Fair Value Of Financial Instruments

Fair Value Of Financial Instruments

Note 11: Fair Value of Financial Instruments

The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis as of July 1, 2011 and December 31, 2010 (in millions):


	Balance as of July 1, 2011		Quoted Prices in Active Markets (Level 1)		Balance as of December 31, 2010		Quoted Prices in Active Markets (Level 1)
Description
Assets:
Cash and cash equivalents:
Demand and time deposits	$	454.9	$	454.9	$	309.4	$	309.4
Money market funds		46.1		46.1		46.1		46.1
Treasuries		249.2		249.2		267.8		267.8
Commercial paper		5.0		5.0		0		0
Corporate bonds		1.4		1.4		0		0
Short-term investments:
Commercial paper		40.0		40.0		0		0
Corporate bonds		72.2		71.1		0		0

Total cash, cash equivalents, short-term investments	$	868.8	$	867.7	$	623.3	$	623.3

Other Current Assets
Foreign currency exchange contracts		1.3		1.3		1.1		1.1

Total financial assets	$	870.1	$	869.0	$	624.4	$	624.4

Liabilities:
Foreign currency exchange contracts	$	0.8	$	0.8	$	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 $112.2 million contains $1.1 million of unrealized losses as of July 1, 2011.

As of July 1, 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) at July 1, 2011 and December 31, 2010 are as follows (in millions):


	July 1, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt, including current portion
Convertible Notes - Level 1	$	675.2	$	853.3	$	579.7	$	818.0
Long-term debt - Level 3	$	538.4	$	503.8	$	160.7	$	155.1

The fair value of the Convertible Notes was estimated based on quoted market prices.

The fair value of the long-term debt was estimated based on discounting the par value of the debt over its life for the difference between the debt stated interest rate and current market rates for similar debt at July 1, 2011 and December 31, 2010.

The fair value of Level 3 financial instruments was determined by discounting the remaining payments of the outstanding debt using estimated current rates ranging from 0.93% to 4.05% at July 1, 2011.

- 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
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+ Details

Segment Information

6 Months Ended

Jul. 01, 2011

Segment Information

Segment Information

Note 12: Segment Information

Revenues, gross profit and operating income for the Company's reportable segments for the three and six months ended July 1, 2011 and July 2, 2010, respectively, are as follows (in millions):


	Automotive & Power Group		Computing & Consumer Group		Digital, Mixed- Signal and Memory Product Group		Standard Products Group		SANYO Semiconductor Products Group			Total
For quarter ended July 1, 2011:
Revenues from external customers	$	155.7	$	143.8	$	155.8	$	176.2	$	274.3		$	905.8
Segment gross profit	$	54.7	$	58.2	$	85.2	$	64.8	$	21.6		$	284.5
Segment operating income (loss)	$	22.7	$	28.1	$	30.4	$	43.9	$	(42.4	)	$	82.7
For quarter ended July 2, 2010:
Revenues from external customers	$	139.2	$	134.1	$	134.0	$	176.0	$	0		$	583.3
Segment gross profit	$	51.9	$	61.6	$	77.9	$	63.9	$	0		$	255.3
Segment operating income (loss)	$	23.7	$	31.7	$	31.1	$	38.3	$	0		$	124.8


	Automotive & Power Group		Computing & Consumer Group		Digital, Mixed- Signal and Memory Product Group		Standard Products Group		SANYO Semiconductor Products Group			Total
For the six months ended July 1, 2011:
Revenues from external customers	$	302.7	$	277.1	$	294.8	$	349.4	$	552.4		$	1,776.4
Segment gross profit	$	110.1	$	112.6	$	163.5	$	131.6	$	26.0		$	543.8
Segment operating income (loss)	$	45.5	$	49.2	$	56.7	$	88.9	$	(85.2	)	$	155.1
For six months ended July 2, 2010:
Revenues from external customers	$	265.1	$	258.3	$	272.5	$	337.6	$	0		$	1,133.5
Segment gross profit	$	96.7	$	114.5	$	162.5	$	123.3	$	0		$	497.0
Segment operating income (loss)	$	39.3	$	52.4	$	67.1	$	76.6	$	0		$	235.4

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):


	Quarter Ended
	July 1, 2011			July 2, 2010
Gross profit for reportable segments	$	284.5		$	255.3
Unallocated amounts:
Other unallocated manufacturing costs		(18.4	)		(11.5	)

Gross profit	$	266.1		$	243.8

Operating income for reportable segments	$	82.7		$	124.8
Unallocated amounts:
Restructuring and other charges		(5.1	)		(2.3	)
Other unallocated manufacturing costs		(18.4	)		(11.5	)
Other unallocated operating expenses		(2.3	)		(9.5	)

Operating income	$	56.9		$	101.5


	Six Months Ended
	July 1, 2011			July 2, 2010
Gross profit for reportable segments	$	543.8		$	497.0
Unallocated amounts:
Other unallocated manufacturing costs	$	(35.3	)	$	(25.1	)

Gross profit	$	508.5		$	471.9

Operating income for reportable segments	$	155.1		$	235.4
Unallocated amounts:
Restructuring and other charges		(17.5	)		(6.1	)
Other unallocated manufacturing costs		(35.3	)		(25.1	)
Other unallocated operating expenses		(12.7	)		(18.5	)

Operating income	$	89.6		$	185.7

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):


	Quarter Ended
	July 1, 2011		July 2, 2010
United States	$	134.8	$	117.9
Other Americas		11.1		2.8
United Kingdom		107.8		92.8
Belgium		2.1		0
China		277.6		199.4
Japan		119.0		17.7
Singapore		193.6		134.0
Other Asia/Pacific		59.8		18.7
Other Europe		0		0

	$	905.8	$	583.3


	Six Months Ended
	July 1, 2011		July 2, 2010
United States	$	262.0	$	237.1
Other Americas		17.3		4.5
United Kingdom		217.7		186.7
Belgium		3.0		0.1
China		547.5		371.6
Japan		244.4		32.5
Singapore		364.4		264.2
Other Asia/Pacific		120.1		36.8
Other Europe		0		0

	$	1,776.4	$	1,133.5

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


	July 1, 2011		December 31, 2010
United States	$	263.4	$	223.7
China		100.3		97.0
Europe		107.0		104.6
Malaysia		156.7		137.4
Other Asia/Pacific		266.0		178.3
Japan		185.2		70.8
Belgium		65.2		47.8
Other Americas		7.1		4.7

	$	1,150.9	$	864.3

For the quarter and six months ended July 1, 2011, there was no individual customer which accounted for more than 10.0% of the Company's total revenues. For the quarter and six months ended July 2, 2010, one of the Company's customers accounted for 12.0% of the Company's total revenues.

- 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
-Section 50
-Paragraph 30
-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
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-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-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

Acquisitions (Tables)

6 Months Ended

Jul. 01, 2011

Acquisition of SANYO Semiconductor Co., LTD [Member]

Schedule Of Business Combination Purchase Price Allocation


	Initial Estimate			Adjustments			Revised Estimate
Cash and cash equivalents	$	117.1		$	0		$	117.1
Receivables, net		242.1			0			242.1
Inventory		423.9			(5.0	)		418.9
Deferred income taxes current		0.5			0			0.5
Other current assets		119.2			0			119.2
Property, plant and equipment		148.0			(1.3	)		146.7
Deferred income taxes, noncurrent		60.5			0			60.5
Intangible assets		55.7			0			55.7
Other non-current assets		14.9			0			14.9

Total assets acquired		1,181.9			(6.3	)		1,175.6


Accounts payable		(300.0	)		0			(300.0	)
Deferred income taxes, current		(70.3	)		0			(70.3	)
Other current liabilities		(61.3	)		(6.6	)		(67.9	)
Deferred income taxes, noncurrent		(0.5	)		0			(0.5	)
Long-term accrued liabilities		(187.9	)		0			(187.9	)

Total liabilities assumed		(620.0	)		(6.6	)		(626.6	)
Net assets acquired		561.9			(12.9	)		549.0
Gain on acquisition		(61.3	)		(7.8	)		(69.1	)

Purchase price	$	500.6		$	(20.7	)	$	479.9

Unaudited Proforma Consolidated Results Of Operations


	For Quarter Ended July 2, 2010		For Six Months Ended July 2, 2010
Net Revenues	$	899.8	$	1,742.4
Net Income	$	56.8	$	155.2
Net income per common share—Basic	$	0.13	$	0.36
Net income per common share—Diluted	$	0.13	$	0.35

Acquisition of the CMOS Image Sensor Business Unit from Cypress Semiconductor [Member]

Schedule Of Business Combination Purchase Price Allocation


Cash and cash equivalents	$	1.5
Receivables, net		2.6
Inventory		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

- 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

Goodwill And Intangible Assets (Tables)

6 Months Ended

Jul. 01, 2011

Goodwill And Intangible Assets

Summary Of Reconciliation Of Cost Of Goodwill


Acquisition	Operating Segment	Reporting Unit	Balance as of December 31, 2010										For the Six Months Ended July 1, 2011						Balance as of July 1, 2011
Acquisition	Operating Segment	Reporting Unit	Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value		Goodwill Acquired		Purchase Price Adjustments		Impairment Losses		Goodwill		Accumulated Amortization			Accumulated Impairment Losses			Carrying Value
Cherry acquisition:
	Automotive & Power Group:
		Analog Automotive	$	21.8	$	(4.2	)	$	0		$	17.6	$	0	$	0	$	0	$	21.8	$	(4.2	)	$	0		$	17.6
	Computing & Consumer Products:
		Signal & Interface		29.1		(5.6	)		0			23.5		0		0		0		29.1		(5.6	)		0			23.5
Leshan additional interest:
	Standard Products:
		Small Signal		3.8		0			0			3.8		0		0		0		3.8		0			0			3.8
AMIS acquisition:
	Digital & Mixed-Signal Product Group:
		Industrial		238.7		0			(214.7	)		24.0		0		0		0		238.7		0			(214.7	)		24.0
		Foundry		146.2		0			(131.4	)		14.8		0		0		0		146.2		0			(131.4	)		14.8
		Medical		79.7		0			(59.9	)		19.8		0		0		0		79.7		0			(59.9	)		19.8
		Military/Aerospace		44.8		0			0			44.8		0		0		0		44.8		0			0			44.8
Catalyst acquisition:
	Standard Products:
		Memory Products		14.1		0			0			14.1		0		0		0		14.1		0			0			14.1
PulseCore acquisition:
	Digital & Mixed-Signal Product Group:
		Protection Products		8.9		0			(8.9	)		0		0		0		0		8.9		0			(8.9	)		0
CMD acquisition:
	Standard Products:
		Filter Products		20.1		0			0			20.1		0		0		0		20.1		0			0			20.1
SDT acquisition:
	Digital & Mixed-Signal Product Group:
		Medical Products		8.7		0			0			8.7		0		0		0		8.7		0			0			8.7
ISBU acquisition:
	Digital & Mixed-Signal Product Group:
		Sensor Products		0		0			0			0		8.0		0		0		8.0		0			0			8.0

			$	615.9	$	(9.8	)	$	(414.9	)	$	191.2	$	8.0	$	0	$	0	$	623.9	$	(9.8	)	$	(414.9	)	$	199.2

Summary Of Intangible Assets, Net


	July 1, 2011
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.9	)	$	0		$	0		$	6.0		5-12
Assembled workforce		6.7		(6.7	)		0			0			0		5
Customer relationships		280.1		(60.3	)		(27.5	)		(3.2	)		189.1		5-18
Non-compete agreements		0.5		(0.5	)		0			0			0		1-3
Patents		43.7		(7.1	)		0			0			36.6		12
Developed technology		130.0		(29.6	)		0			(2.0	)		98.4		5-12
Trademarks		14.0		(2.5	)		0			0			11.5		15
In-process research and development		19.4		0			0			(2.0	)		17.4		8
Acquired software		1.0		(1.0	)		0			0			0		2
Backlog		0.8		(0.8	)		0			0			0		0.3

Total intangibles	$	510.1	$	(116.4	)	$	(27.5	)	$	(7.2	)	$	359.0


	December 31, 2010
	Original Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Carrying Value		Useful Life (in Years)
Intellectual property	$	13.9	$	(7.0	)	$	0		$	0		$	6.9		5-12
Assembled workforce		6.7		(6.1	)		0			0			0.6		5
Customer relationships		250.5		(51.2	)		(27.2	)		(3.2	)		168.9		5-18
Non-compete agreements		0.5		(0.5	)		0			0			0		1-3
Patents		16.7		(4.2	)		0			0			12.5		12
Developed technology		113.0		(22.5	)		0			(2.0	)		88.5		5-12
Trademarks		11.0		(1.7	)		0			0			9.3		15
In-process research and development		18.3		0			0			(2.0	)		16.3		8
Acquired software		1.0		(1.0	)		0			0			0		2

Total intangibles	$	431.6	$	(94.2	)	$	(27.2	)	$	(7.2	)	$	303.0

Summary Of Amortization Expense


	Total
Remainder of 2011	$	27.5
2012		40.6
2013		35.9
2014		35.7
2015		34.6
Thereafter		167.3

Total estimated amortization expense	$	341.6

- 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

Restructuring, Asset Impairments And Other, Net (Tables)

6 Months Ended

Jul. 01, 2011

Restructuring Activities Related To The 2011 Acquisition Of SANYO Semiconductor [Member]

Employee Separation Charges And Exit Costs


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011	$	0	$	8.4	$	(8.4	)	$	0	$	0

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0	$	1.5	$	(1.5	)	$	0	$	0

Restructuring Activities Related To 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member]

Employee Separation Charges And Exit Costs


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation charges (in millions):
December 31, 2010 through July 1, 2011	$	1.0	$	0	$	(0.7	)	$	0	$	0.3

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0.1	$	0	$	0		$	0	$	0.1

Restructuring Activities Related To 2009 Global Workforce Reduction [Member]

Employee Separation Charges And Exit Costs


	Balance at Beginning of Period		Charges		Usage			Adjustments		Balance at End of Period
Estimated employee separation charges (in millions):
December 31, 2010 through July 1, 2011	$	0.2	$	0	$	(0.2	)	$	0	$	0

Acquisition Of AMIS Holdings, Inc. [Member]

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


	December 31, 2010		Usage			Adjustments		July 1, 2011
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011		0.2	$	0		$	0	$	0.2

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	9.8	$	(0.3	)	$	0	$	9.5

Other [Member]

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


	Quarter Ended July 1, 2011		Six Months Ended July 1, 2011
Restructuring
2011 Charges:
Estimated employee separation charges	$	2.5	$	10.9
Exit costs		0.3		1.8
Other
Assets damaged related to Japanese earthquake		2.3		4.8

	$	5.1	$	17.5

Restructuring Activities Related To The 2011 Closure Of The Phoenix, Arizona Wafer Manufacturing Facility [Member]

Employee Separation Charges And Exit Costs


	Balance at Beginning of Period		Charges		Usage		Adjustments		Balance at End of Period
Estimated employee separation costs (in millions):
December 31, 2010 through July 1, 2011	$	0	$	2.5	$	0	$	0	$	2.5

Estimated costs to exit (in millions):
December 31, 2010 through July 1, 2011	$	0	$	0.3	$	0	$	0	$	0.3

Balance Sheet Information (Tables)

6 Months Ended

Jul. 01, 2011

Balance Sheet Information

Schedule Of Balance Sheet Information


	July 1, 2011			December 31, 2010
Receivables, net:
Accounts receivable	$	584.2		$	301.9
Less: Allowance for doubtful accounts		(8.4	)		(7.3	)

	$	575.8		$	294.6

Inventories:
Raw materials	$	70.2		$	49.0
Work in process		440.6			210.9
Finished goods		238.4			100.9

	$	749.2		$	360.8

Other Current Assets:
Deposits	$	3.2		$	1.9
Prepaid Expenses		33.3			22.2
Tax Receivables		24.1			14.9
Other		25.6			24.6

	$	86.2		$	63.6

Property, plant and equipment, net:
Land	$	85.0		$	48.3
Buildings		556.2			484.4
Machinery and equipment		1,890.8			1,631.1

Total property, plant and equipment		2,532.0			2,163.8
Less: Accumulated depreciation		(1,381.1	)		(1,299.5	)

	$	1,150.9		$	864.3

Accrued expenses:
Accrued payroll	$	118.3		$	73.1
Sales related reserves		42.6			36.5
Restructuring reserves		12.9			11.3
Accrued pension liability		0.3			0.3
Other		47.3			41.4

	$	221.4		$	162.6

Accumulated other comprehensive loss:
Foreign currency translation adjustments	$	(54.3	)	$	(58.8	)
Unrecognized prior service cost of defined benefit pension plan		(0.2	)		(0.1	)
Prior service cost from pension legal plan amendment		0			(0.2	)

	$	(54.5	)	$	(59.1	)

Warranty Reserves


	Six Months Ended
	July 1, 2011			July 2, 2010
Beginning Balance	$	3.9		$	3.2
Provision		1.2			0.4
Usage		(0.5	)		(0.1	)

Ending Balance	$	4.6		$	3.5

Periodic Pension Expense


	Quarter Ended						Six Months Ended
	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
Service cost	$	2.1		$	1.0		$	4.4		$	2.0
Interest cost		1.3			0.8			2.6			1.6
Expected return on plan assets		(1.0	)		(0.8	)		(2.0	)		(1.6	)
Amortization of prior service cost		0.1			0.1			0.2			0.2

Total net periodic pension cost	$	2.5		$	1.1		$	5.2		$	2.2

Long-Term Debt (Tables)

3 Months Ended

6 Months Ended

12 Months Ended

Jul. 01, 2011

Jul. 02, 2010

Jul. 01, 2011

Jul. 02, 2010

Dec. 31, 2010

Long-Term Debt

Long-Term Debt


	July 1, 2011			December 31, 2010
U.S. real estate mortgages payable monthly through the first quarter 2016 at an average rate of 4.857%	$	32.4		$	33.0
Loan with a Japanese company due 2011 through 2017, interest payable quarterly at 1.99575%		358.6			0
ZeroCoupon Convertible Senior Subordinated Notes due 2024 ⁽¹⁾		90.8			87.5
1.875% Convertible Senior Subordinated Notes due 2025 ⁽²⁾		85.2			82.2
2.625% Convertible Senior Subordinated Notes due 2026 ⁽³⁾		421.3			410.1
Loan with British finance company, interest payable monthly at 2.57605% and 2.18%, respectively		16.0			13.8
Loan with Hong Kong bank, interest payable weekly at 1.96725% and 2.0325%, respectively		35.0			40.0
Loan with Singapore bank, interest payable weekly at 1.96%		15.0			0
Loans with Philippine banks due 2011 through 2015, interest payable quarterly at an average rate of 1.78401% and 1.80446%, respectively		73.5			68.8
Loans with Chinese banks due 2011 through 2013, interest payable quarterly at an average rate of 4.11040% and 4.23375%, respectively		34.0			34.0
Loans with Japanese banks due 2011 through 2013, interest payable monthly & semi-annually at an average rate of 1.47403% and 1.44545%, respectively		6.2			3.9
Capital lease obligations		117.4			115.5

		1,285.4			888.8
Less: Current maturities		(286.7	)		(136.0	)

	$	998.7		$	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.

Annual Maturities Relating To Long-term Debt


	Actual Maturities
Remainder 2011		101.2
2012		321.2
2013		513.9
2014		71.5
2015		60.7
Thereafter		216.9

Total	$	1,285.4

Notes To Consolidated Statement Of Balance Sheet


	Issuer		Guarantor
	ON Semiconductor Corporation ⁽¹⁾		SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Total
As of July 1, 2011
Cash and cash equivalents	$	0	$	489.1		$	0		$	267.5	$	0		$	756.6
Short-term investments		0		112.2			0			0		0			112.2
Receivables, net		0		54.7			0			521.1		0			575.8
Inventories, net		0		50.4			0			691.4		7.4			749.2
Deferred income taxes, current		0		5.6			0			11.3		0			16.9
Other current assets		0		12.6			0			73.6		0			86.2

Total current assets		0		724.6			0			1,564.9		7.4			2,296.9
Property, plant and equipment, net		0		261.0			2.4			890.6		(3.1	)		1,150.9
Deferred income taxes		0		0			0			67.4		0			67.4
Goodwill and other intangible assets		0		287.1			37.2			266.1		(32.2	)		558.2
Investments and other assets		2,162.3		1,516.7			54.8			847.0		(4,504.4	)		76.4

Total assets	$	2,162.3	$	2,789.4		$	94.4		$	3,636.0	$	(4,532.3	)	$	4,149.8

Accounts payable	$	0	$	43.2		$	0.1		$	485.6	$	0		$	528.9
Accrued expenses and other current liabilities		91.4		150.4			0.8			268.1		1.7			512.4
Deferred Tax Liabilities		0		0			0			65.2		0			65.2
Deferred income on sales to distributors		0		42.6			0			145.1		0			187.7

Total current liabilities		91.4		236.2			0.9			964.0		1.7			1,294.2
Long-term debt		506.5		417.9			0			74.3		0			998.7
Other long-term liabilities		0		25.5			0.4			221.1		0			247.0
Deferred Income Taxes		0		5.6			0			16.7		0			22.3
Intercompany		0.3		(207.4	)		(53.9	)		55.5		205.5			0

Total liabilities		598.2		477.8			(52.6	)		1,331.6		207.2			2,562.2
Total ON Semiconductor Corporation stockholders' equity (deficit)		1,564.1		2,311.6			147.0			2,304.4		(4,763.0	)		1,564.1
Minority interests in consolidated subsidiaries		0		0			0			0		23.5			23.5

Total stockholders' equity		1,564.1		2,311.6			147.0			2,304.4		(4,739.5	)		1,587.6

Total liabilities and stockholders' equity	$	2,162.3	$	2,789.4		$	94.4		$	3,638.1	$	(4,532.3	)	$	4,149.8


	Issuer		Guarantor
	ON Semiconductor Corporation ⁽¹⁾		SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
As of December 31, 2010
Cash and cash equivalents	$	0	$	392.3		$	0		$	231.0		$	0		$	623.3
Receivables, net		0		47.4			0			247.2			0			294.6
Inventories, net		0		48.0			0			299.9			12.9			360.8
Other current assets		0		14.9			0			48.7			0			63.6
Deferred income taxes, net of allowances		0		5.6			0			10.1			0			15.7

Total current assets		0		508.2			0			836.9			12.9			1,358.0
Restricted cash		0		142.1			0			0			0			142.1
Property, plant and equipment, net		0		221.0			2.6			644.1			(3.4	)		864.3
Deferred income taxes		0		0			0			0			0			0
Goodwill and other intangible assets		0		291.1			37.2			200.3			(34.4	)		494.2
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	$	0	$	43.4		$	0.1		$	213.4		$	0		$	256.9
Accrued expenses and other current liabilities		0.6		116.0			0.8			185.4			1.7			304.5
Deferred income on sales to distributors		0		33.7			0			115.8			0			149.5

Total current liabilities		0.6		193.1			0.9			514.6			1.7			710.9
Long-term debt		579.7		103.0			0			70.1			0			752.8
Other long-term liabilities		0		21.1			0.4			27.8			0			49.3
Deferred income taxes, net of allowances		0		5.6			0			12.6			0			18.2
Intercompany		0.3		(123.8	)		(53.4	)		(28.6	)		205.5			0

Total liabilities		580.6		199.0			(52.1	)		596.5			207.2			1,531.2
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		0		0			0			0			22.0			22.0

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

Total liabilities and stockholders' 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 Comprehensive Income


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
For the Quarter ended July 1, 2011
Revenues	$	0		$	198.9		$	7.4	$	1,057.5		$	(358	)	$	905.8
Cost of revenues		0			135.5			0.2		865.2			(361.2	)		639.7

Gross profit		0			63.4			7.2		192.3			3.2			266.1

Research and development		0			48.7			2.7		37.8			0			89.2
Selling and marketing		0			17.9			0.3		33			0			51.2
General and administrative		0			22.9			0.3		29.1			0			52.3
Amortization of acquisition related intangible assets		0			4.6			0		7.9			(1.1	)		11.4
Restructuring, asset impairments and other, net		0			2.8			0		2.3			0			5.1

Total operating expenses		0			96.9			3.3		110.1			(1.1	)		209.2

Operating income (loss)		0			(33.5	)		3.9		82.2			4.3			56.9
Interest expense, net		(13.1	)		(1.7	)		0		(2.8	)		0			(17.6	)
Other		0			(0.8	)		0		6.5			0			5.7
Gain (loss) on debt prepayment		0			0			0		0			0			0
Gain (loss) on acquisition		0			0.1			0		(0.1	)		0			0
Equity in earnings		54.1			91.1			1.8		0			(147.0	)		0

Income (loss) before income taxes and minority interests		41.0			55.2			5.7		85.8			(142.7	)		45.0
Income tax provision		0			10.1			0		(13.3	)		0			(3.2	)

Net income (loss)		41.0			65.3			5.7		72.5			(142.7	)		41.8
Net income (loss) attributable to minority interest		0			0			0		0			(0.8	)		(0.8	)

Net income (loss) attributable to ON Semiconductor	$	41.0		$	65.3		$	5.7	$	72.5		$	(143.5	)	$	41.0


	Issuer			Guarantor
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the Quarter ended July 2, 2010
Revenues	$	0		$	167.6		$	0		$	729.8		$	(314.1	)	$	583.3
Cost of revenues		0			119.1			0.6			538.2			(318.4	)		339.5

Gross profit		0			48.5			(0.6	)		191.6			4.3			243.8

Research and development		0			10.4			2.2			47.5			0			60.1
Selling and marketing		0			15.0			0.2			21.3			0			36.5
General and administrative		0			5.7			0.2			29.4			0			35.3
Amortization of acquisitions related intangible assets		0			4.2			0			4.9			(1.0	)		8.1
Restructuring, asset impairments and other, net		0			0			0			2.3			0			2.3

Total operating expenses		0			35.3			2.6			105.4			(1.0	)		142.3

Operating income (loss)		0			13.2			(3.2	)		86.2			5.3			101.5
Interest expense, net		(12.5	)		(1.7	)		0			(0.2	)		0			(14.4	)
Loss on debt repurchase		0			(0.7	)		0			0			0			(0.7	)
Other		0.1			(0.8	)		0			(2.7	)		0			(3.4	)
Equity in earnings		91.1			76.8			2.3			0			(170.2	)		0

Income (loss) before income taxes and minority interests		78.7			86.8			(0.9	)		83.3			(164.9	)		83.0
Income tax provision		0			2.0			0			(5.4	)		0			(3.4	)
Minority interests		0			0			0			0			0			0

Net income (loss)		78.7			88.8			(0.9	)		77.9			(164.9	)		79.6
Net income (loss) attributable to minority interest		0			0			0			0.1			(1.0	)		(0.9	)

Net income (loss) attributable to ON Semiconductor	$	78.7		$	88.8		$	(0.9	)	$	78.0		$	(165.9	)	$	78.7

Notes To Consolidated Statement Of Operations And Cash Flow


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation (1)			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the six months ended July 1, 2011
Revenues	$	0		$	398.7		$	7.5		$	2,069.3		$	(699.1	)	$	1,776.4
Cost of revenues		0			271.8			0.5			1,689.7			(694.1	)		1,267.9

Gross profit		0			126.9			7.0			379.6			(5.0	)		508.5

Research and development		0			93.8			5.6			80.9			0			180.3
Selling and marketing		0			36.9			0.5			63.2			0			100.6
General and administrative		0			49.4			0.4			49.6			0			99.4
Amortization of acquisition related intangible assets		0			9.1			0			14.1			(2.1	)		21.1
Restructuring, asset impairments and other, net		0			2.8			0			14.7			0			17.5

Total operating expenses		0			192.0			6.5			222.5			(2.1	)		418.9

Operating income (loss)		0			(65.1	)		0.5			157.1			(2.9	)		89.6
Interest expense, net		(26.0	)		(3.8	)		0			(5.3	)		0			(35.1	)
Other		0			3.4			0			2.1			0			5.5
Gain (loss) on acquisition		0			69.2			0			(0.1	)		0			69.1
Equity in earnings		149.6			133.5			3.5			0			(286.6	)		0

Income (loss) before income taxes and minority interests		123.6			137.2			4.0			153.8			(283.7	)		129.1
Income tax provision		0			11.1			0			(15.1	)		0			(4.0	)

Net income (loss)		123.6			148.3			4.0			138.7			(283.7	)		125.1
Net income (loss) attributable to minority interest		0			0			0			0			(1.5	)		(1.5	)

Net income (loss) attributable to ON Semiconductor Corporation	$	123.6		$	148.3		$	4.0		$	138.7		$	(282.2	)	$	123.6

Net cash provided by operating activities	$	0		$	(157.7	)	$	0.1		$	419.2		$	0		$	261.6

Cash flows from investing activities:
Purchases of property, plant and equipment		0			(42.8	)		(0.1	)		(130.6	)					(173.5	)
Funds deposited for purchases of property, plant and equipment		0			0			0			0			0			0
Proceeds from sales of held-to-maturity securities 2		0			0			0			0			0			0
Purchase of a business, net of cash acquired		0			69.1			0			(87	)		0			(17.9	)
Increase in restricted cash		0			142.1			0			0			0			142.1
Proceeds from sales of property, plant and equipment		0			0.1			0			3.2			0			3.3
Purchases of held-to-maturity securities		0			(112.2	)		0			0			0			(112.2	)

Net cash used in investing activities		0			56.3			(0.1	)		(214.4	)		0			(158.2	)

Cash flows from financing activities:
Intercompany loans		0			(89.9	)		0			89.9			0			0
Intercompany loan repayments		0			258.1			0			(258.1	)		0			0
Proceeds from debt issuance		0			0			0			41.3						41.3
Proceeds from issuance of common stock under the employee stock purchase plan		0			4.0			0			0			0			4.0
Proceeds from exercise of stock options					57.1			0			0			0			57.1
Repurchase of Treasury Stock		0			(12.1	)		0			0			0			(12.1	)
Dividends to minority shareholder of consolidated subsidiary		0			0			0			0			0			0
Equity injections from Parent		0			0			0			0			0			0
Subsidiary declared dividend		0			0			0			0			0			0
Payment of capital lease obligation		0			(18.4	)		0			(0.2	)		0			(18.6	)
Repayment of long term debt		0			(0.6	)		0			(43.2	)		0			(43.8	)

Net cash used in financing activities		0			198.2			0			(170.3	)		0			27.9

Effect of exchange rate changes on cash and cash equivalents		0			0			0			2.0			0			2.0

Net increase (decrease) in cash and cash equivalents		0			96.8			0			36.5			0			133.3
Cash and cash equivalents, beginning of period		0			392.3			0			231.0			0			623.3

Cash and cash equivalents, end of period	$	0		$	489.1		$	0		$	267.5		$	0		$	756.6

(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.


	Issuers			Guarantor Subsidiaries
	ON Semiconductor Corporation ⁽¹⁾			SCI LLC			Other Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
For the six months ended July 2, 2010
Revenues	$	0		$	339.7		$	0		$	1,421.1		$	(627.3	)	$	1,133.5
Cost of revenues		0			231.1			1.3			1,056.9			(627.7	)		661.6

Gross profit		0			108.6			(1.3	)		364.2			0.4			471.9

Research and development		0			23.6			4.7			97.0			0			125.3
Selling and marketing		0			29.6			0.4			42.1			0			72.1
General and administrative		0			8.0			0.4			58.4			0			66.8
Amortization of acquisition related intangible assets		0			8.2			0			9.7			(2.0	)		15.9
Restructuring, asset impairments and other, net		0			0			0			6.1			0			6.1

Total operating expenses		0			69.4			5.5			213.3			(2.0	)		286.2

Operating income (loss)		0			39.2			(6.8	)		150.9			2.4			185.7
Interest expense, net		(25.6	)		(4.5	)		0			(0.6	)		0			(30.7	)
Loss on debt repurchase		0			(0.7	)		0			0			0			(0.7	)
Other		0.1			0			0			(6.3	)		0			(6.2	)
Equity in earnings		167.2			120.1			3.8			0			(291.1	)		0

Income (loss) before income taxes and minority interests		141.7			154.1			(3.0	)		144.0			(288.7	)		148.1
Income tax provision		0			7.3			0			(12.1	)		0			(4.8	)

Net income (loss)		141.7			161.4			(3.0	)		131.9			(288.7	)		143.3
Net income (loss) attributable to minority interest		0			0			0			0.1			(1.7	)		(1.6	)

Net income (loss) attributable to ON Semiconductor Corporation	$	141.7		$	161.4		$	(3.0	)	$	132.0		$	(290.4	)	$	141.7

Net cash provided by operating activities	$	0		$	123.9		$	0		$	144.5		$	—		$	268.4

Cash flows from investing activities:
Purchases of property, plant and equipment		0			(28.3	)		0			(65.2	)		0			(93.5	)
Funds deposited for purchases of property, plant and equipment		0			0			0			(0.9	)		0			(0.9	)
Proceeds from sales of held-to-maturity securities		0			0			0			45.5			0			45.5
Purchase of a business, net of cash acquired		0			0			0			(90.2	)		0			(90.2	)
Proceeds from sales of property, plant and equipment		0			0			0			0			0			0

Net cash used in investing activities		0			(28.3	)		0			(110.8	)		0			(139.1	)

Cash flows from financing activities:
Intercompany loans		0			(358.1	)		0			358.1			0			0
Intercompany loan repayments		0			282.9			0			(282.9	)		0			0
Proceeds from debt issuance		0			0			0			23.2			0			23.2
Proceeds from issuance of common stock under the employee stock purchase plan		0			3.3			0			0			0			3.3
Proceeds from exercise of stock options					7.3			0			0			0			7.3
Repurchase of Treasury Stock		0			(7.0	)		0			0			0			(7.0	)
Payment of capital lease obligation		0			(13.0	)		0			(2.3	)		0			(15.3	)
Repayment of long term debt		0			(173.4	)		0			(26.1	)		0			(199.5	)

Net cash used in financing activities		0			(258.0	)		0			70.0			0			(188.0	)

Effect of exchange rate changes on cash and cash equivalents		0			0			0			0.1			0			0.1

Net increase (decrease) in cash and cash equivalents		0			(162.4	)		0			103.8			0			(58.6	)
Cash and cash equivalents, beginning of period		0			286.0			0			239.7			0			525.7

Cash and cash equivalents, end of period	$	0		$	123.6		$	0		$	343.5		$	0		$	467.1

(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.

Equity (Tables)

6 Months Ended

Jul. 01, 2011

Equity

Income per Share Calculations


	Quarter Ended				Six Months Ended
	July 1, 2011		July 2, 2010		July 1, 2011		July 2, 2010
Net income applicable to ON Semiconductor Corporation	$	41.0	$	78.7	$	123.6	$	141.7

Basic weighted average common shares outstanding		446.2		430.3		443.8		429.2
Add: Incremental shares for:
Dilutive effect of stock options and awards		9.1		9.3		10.0		10.2
1.875% Convertible Senior Subordinated Notes		4.7		0		4.7		0
2.625% Convertible Senior Subordinated Notes		0.7		0		0.7		0
ZeroConvertible Coupon Senior Subordinated Notes		0.8		0		0.8		0

Diluted weighted average common shares outstanding		461.5		439.6		460.0		439.4

Income per common share attributable to ON Semiconductor Corporation
Basic:	$	0.09	$	0.18	$	0.28	$	0.33

Diluted:	$	0.09	$	0.18		0.27	$	0.32

Employee Stock Benefit Plans (Tables)

6 Months Ended

Jul. 01, 2011

Employee Stock Benefit Plans

Weighted-Average Assumptions Of Stock Options Granted


	Quarter Ended
	July 1, 2011			July 2, 2010
Volatility		45.1	%		48.5	%
Risk-free interest rate		2.0	%		2.2	%
Expected term		4.9 years			4.9 years

	Six Months Ended
	July 1, 2011			July 2, 2010
Volatility		42.1	%		47.4	%
Risk-free interest rate		2.1	%		2.3	%
Expected term		4.9 years			5.1 years

Summary Of Stock Option Plans


	Six Months Ended July 1, 2011
	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (In The Money)
Outstanding at December 31, 2010		27.4		$	7.44
Granted		0.3			10.82
Exercised		(8.3	)		6.90
Cancelled		(0.4	)		8.34

Outstanding at July 1, 2011		19.0		$	7.70		4.9	$	59.9

Exercisable at July 1, 2011		14.8		$	7.85		4.3	$	45.3

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 $10.67		12.8	$	7.13		4.0	$	6.99		16.8	$	7.09
Above $10.67		2.0		12.47		0.2		11.19		2.2		12.35

Total outstanding		14.8	$	7.85		4.2	$	7.20		19.0	$	7.70

Summary Of Restricted Stock Units Granted


	Six Months Ended July 1, 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		3.9			10.70
Released		(3.5	)		4.91
Forfeited		(0.8	)		7.97

Nonvested shares of restricted stock units at July 1, 2011		11.9		$	6.88

Weighted-Average Assumptions With Employee Stock Purchase Plan


	Quarter Ended						Six Months Ended
Employee Stock Purchase Plan	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
Expected life (in years)		0.25			0.25			0.25			0.25
Risk-free interest rate		0.1	%		0.2	%		0.1	%		0.1	%
Volatility		34.0	%		38.0	%		31.0	%		42.0	%

Summary Of Share-Based Compensation Expense


	Quarter Ended				Six Months Ended
	July 1, 2011		July 2, 2010		July 1, 2011		July 2, 2010
Cost of revenues	$	1.7	$	3.3	$	3.6	$	6.6
Research and development		1.9		2.7		3.9		5.2
Selling and marketing		1.7		2.0		3.6		4.6
General and administrative		5.2		7.0		9.8		12.3
Restructuring		0		0.4		0		0.4

Share-based compensation expense before income taxes	$	10.5	$	15.4	$	20.9	$	29.1

Related income tax benefits⁽¹⁾		0		0		0		0

Share-based compensation expense, net of taxes	$	10.5	$	15.4	$	20.9	$	29.1

(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

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

Commitments And Contingencies (Tables)

6 Months Ended

Jul. 01, 2011

Commitments And Contingencies

Operating Leases Future Minimum Payments Receivable


Remainder of 2011	$	13.5
2012		25.1
2013		20.1
2014		17.5
2015		15.7
Thereafter		30.9

Total⁽¹⁾	$	122.8

- Definition

The entire disclosure for operating leases of a lessor. This may inlcude a general description of lessor's leasing arrangements for operating leases, including the basis on which contingent rental payments are determined, the existence and terms of renewal or purchase options and escalation clauses, restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions.

+ References + Details

Fair Value Of Financial Instruments (Tables)

6 Months Ended

Jul. 01, 2011

Fair Value Of Financial Instruments

Fair Value Of Assets And Liabilities Measured On Recurring Basis


	Balance as of July 1, 2011		Quoted Prices in Active Markets (Level 1)		Balance as of December 31, 2010		Quoted Prices in Active Markets (Level 1)
Description
Assets:
Cash and cash equivalents:
Demand and time deposits	$	454.9	$	454.9	$	309.4	$	309.4
Money market funds		46.1		46.1		46.1		46.1
Treasuries		249.2		249.2		267.8		267.8
Commercial paper		5.0		5.0		0		0
Corporate bonds		1.4		1.4		0		0
Short-term investments:
Commercial paper		40.0		40.0		0		0
Corporate bonds		72.2		71.1		0		0

Total cash, cash equivalents, short-term investments	$	868.8	$	867.7	$	623.3	$	623.3

Other Current Assets
Foreign currency exchange contracts		1.3		1.3		1.1		1.1

Total financial assets	$	870.1	$	869.0	$	624.4	$	624.4

Liabilities:
Foreign currency exchange contracts	$	0.8	$	0.8	$	0.6	$	0.6

Carrying Amounts And Fair Values Of Long-Term Borrowings


	July 1, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt, including current portion
Convertible Notes - Level 1	$	675.2	$	853.3	$	579.7	$	818.0
Long-term debt - Level 3	$	538.4	$	503.8	$	160.7	$	155.1

Segment Information (Tables)

6 Months Ended

Jul. 01, 2011

Segment Information

Segment Information Of Revenues, Gross Profit And Operating Income


	Automotive & Power Group		Computing & Consumer Group		Digital, Mixed- Signal and Memory Product Group		Standard Products Group		SANYO Semiconductor Products Group			Total
For quarter ended July 1, 2011:
Revenues from external customers	$	155.7	$	143.8	$	155.8	$	176.2	$	274.3		$	905.8
Segment gross profit	$	54.7	$	58.2	$	85.2	$	64.8	$	21.6		$	284.5
Segment operating income (loss)	$	22.7	$	28.1	$	30.4	$	43.9	$	(42.4	)	$	82.7
For quarter ended July 2, 2010:
Revenues from external customers	$	139.2	$	134.1	$	134.0	$	176.0	$	0		$	583.3
Segment gross profit	$	51.9	$	61.6	$	77.9	$	63.9	$	0		$	255.3
Segment operating income (loss)	$	23.7	$	31.7	$	31.1	$	38.3	$	0		$	124.8

Reconciliations Of Segment Gross Profit And Segment Operating Income


	Quarter Ended
	July 1, 2011			July 2, 2010
Gross profit for reportable segments	$	284.5		$	255.3
Unallocated amounts:
Other unallocated manufacturing costs		(18.4	)		(11.5	)

Gross profit	$	266.1		$	243.8

Operating income for reportable segments	$	82.7		$	124.8
Unallocated amounts:
Restructuring and other charges		(5.1	)		(2.3	)
Other unallocated manufacturing costs		(18.4	)		(11.5	)
Other unallocated operating expenses		(2.3	)		(9.5	)

Operating income	$	56.9		$	101.5


	Six Months Ended
	July 1, 2011			July 2, 2010
Gross profit for reportable segments	$	543.8		$	497.0
Unallocated amounts:
Other unallocated manufacturing costs	$	(35.3	)	$	(25.1	)

Gross profit	$	508.5		$	471.9

Operating income for reportable segments	$	155.1		$	235.4
Unallocated amounts:
Restructuring and other charges		(17.5	)		(6.1	)
Other unallocated manufacturing costs		(35.3	)		(25.1	)
Other unallocated operating expenses		(12.7	)		(18.5	)

Operating income	$	89.6		$	185.7

Revenues By Geographic Location Including Local Sales And Exports


	Quarter Ended
	July 1, 2011		July 2, 2010
United States	$	134.8	$	117.9
Other Americas		11.1		2.8
United Kingdom		107.8		92.8
Belgium		2.1		0
China		277.6		199.4
Japan		119.0		17.7
Singapore		193.6		134.0
Other Asia/Pacific		59.8		18.7
Other Europe		0		0

	$	905.8	$	583.3


	Six Months Ended
	July 1, 2011		July 2, 2010
United States	$	262.0	$	237.1
Other Americas		17.3		4.5
United Kingdom		217.7		186.7
Belgium		3.0		0.1
China		547.5		371.6
Japan		244.4		32.5
Singapore		364.4		264.2
Other Asia/Pacific		120.1		36.8
Other Europe		0		0

	$	1,776.4	$	1,133.5

Summary Of Property, Plant And Equipment By Geographic Location


	July 1, 2011		December 31, 2010
United States	$	263.4	$	223.7
China		100.3		97.0
Europe		107.0		104.6
Malaysia		156.7		137.4
Other Asia/Pacific		266.0		178.3
Japan		185.2		70.8
Belgium		65.2		47.8
Other Americas		7.1		4.7

	$	1,150.9	$	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

Acquisitions (Acquisition Of SANYO Semiconductor Co., Ltd.) (Narrative) (Details) $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 01, 2011 USD ($)	Jan. 31, 2011 USD ($)	Jul. 01, 2011 USD ($)	Jul. 02, 2010 USD ($)	Jul. 01, 2011 USD ($) years months	Jul. 02, 2010 USD ($)	Dec. 31, 2010 USD ($)
Other current assets			$ 86.2		$ 86.2		$ 63.6
Amortization					(9.8)		$ (9.8)
Foreign currency translation adjustments			0.1	$ 2.0	$ 4.4	$ 1.8
Acquisition of SANYO Semiconductor Co., LTD [Member]
Effective date of acquisition					January 1, 2011
Business acquisition paid in cash		$ 142.1
Business acquisition price note payable		$ 377.5
Cash Acquired from Acquisition	$ 19.0		39.7
Acquired intangible assets, total			55.7		$ 55.7
Defined benefit pension plan, liabilities			46.9		46.9
SANYO Electric [Member]
Other current assets			80.0		$ 80.0
Cost of goods sold period of benefit (months) \| months					5
Amortization					$ 80.4
Estimated liabilities			136.4		136.4
Patents [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Acquired intangible assets, total			27.0		$ 27.0
Weighted average useful life, years \| years					5.5
Trademarks [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Acquired intangible assets, total			3.0		$ 3.0
Weighted average useful life, years \| years					3
Customer Relationships [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Acquired intangible assets, total			$ 25.7		$ 25.7
Weighted average useful life, years \| years					13
Maximum [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Weighted average useful life, years \| years					8.8

Acquisitions (Acquisition Of The CMOS Image Sensor Business Unit From Cypress Semiconductor) (Narrative) (Details) - CMOS Image Sensor Business Unit from Cypress Semiconductor [Member] $ in Millions	6 Months Ended
	Jul. 01, 2011 USD ($) years
Effective date of acquisition	February 27, 2011
Business acquisition paid in cash	$ 34.1
Acquired intangible assets, total	$ 22.4
Weighted Average Discount Rate, Percent	17.50%
Remaining intangible amount	$ 11.2
Weighted average useful life, years \| years	6.1
Total business acquisition cost	$ 34.1
Goodwill	8.0
In-Process Research and Development [Member]
Acquired intangible assets, total	11.2
Customer Relationships [Member]
Remaining intangible amount	$ 4.2
Weighted average useful life, years	6.0
Developed Technology [Member]
Remaining intangible amount	$ 6.2
Weighted average useful life, years	7.0
Backlog [Member]
Remaining intangible amount	$ 0.8
Weighted average useful life, years \| years	0.3

Acquisitions (Schedule Of Business Combination Purchase Price Allocation) (Details) $ in Millions	Jul. 01, 2011 USD ($)
Acquisition of the CMOS Image Sensor Business Unit from Cypress Semiconductor [Member]
Cash and cash equivalents	$ 1.5
Receivables, net	2.6
Inventory	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)
Total liabilities assumed	(11.2)
Other non-current liabilities	(1.4)
Net assets acquired	34.1
Initial Estimated [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Cash and cash equivalents	117.1
Receivables, net	242.1
Inventory	423.9
Deferred income taxes current	0.5
Other current assets	119.2
Property, plant and equipment	148.0
Deferred income taxes, noncurrent	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, noncurrent	(0.5)
Total liabilities assumed	(620.0)
Long-term accrued liabilities	(187.9)
Net assets acquired	561.9
Gain on acquisition	(61.3)
Purchase price	500.6
Adjustment [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Cash and cash equivalents	0.0
Receivables, net	0.0
Inventory	(5.0)
Deferred income taxes current	0.0
Other current assets	0.0
Property, plant and equipment	(1.3)
Deferred income taxes, noncurrent	0.0
Intangible assets	0.0
Other non-current assets	0.0
Total assets acquired	(6.3)
Accounts payable	0.0
Deferred income taxes, current	0.0
Other current liabilities	(6.6)
Deferred income taxes, noncurrent	0.0
Total liabilities assumed	(6.6)
Long-term accrued liabilities	0.0
Net assets acquired	(12.9)
Gain on acquisition	(7.8)
Purchase price	(20.7)
Revised Estimated [Member] \| Acquisition of SANYO Semiconductor Co., LTD [Member]
Cash and cash equivalents	117.1
Receivables, net	242.1
Inventory	418.9
Deferred income taxes current	0.5
Other current assets	119.2
Property, plant and equipment	146.7
Deferred income taxes, noncurrent	60.5
Intangible assets	55.7
Other non-current assets	14.9
Total assets acquired	1,175.6
Accounts payable	(300.0)
Deferred income taxes, current	70.3
Other current liabilities	(67.9)
Deferred income taxes, noncurrent	(0.5)
Total liabilities assumed	(626.6)
Long-term accrued liabilities	(187.9)
Net assets acquired	549.0
Gain on acquisition	(69.1)
Purchase price	$ 479.9

Acquisitions (Unaudited Proforma Consolidated Results Of Operations) (Details) - Acquisition of SANYO Semiconductor Co., LTD [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jul. 02, 2010	Jul. 02, 2010
Net Revenues	$ 899.8	$ 1,742.4
Net Income	$ 56.8	$ 155.2
Net income per common share-Basic	$ 0.13	$ 0.36
Net income per common share-Diluted	$ 0.13	$ 0.35

- 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

Goodwill And Intangible Assets (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2011 USD ($)	Jul. 02, 2010 USD ($)	Jul. 01, 2011 USD ($) years	Jul. 02, 2010 USD ($)	Dec. 31, 2010 years
Useful life of finite-lived intangible assets, Minimum (in years) \| years			1
Useful life of finite-lived intangible assets, Maximum (in years) \| years			18
Amortization expense \| $	$ 11.9	$ 8.7	$ 22.2	$ 17.1
Cost of goods sold, amortization \| $	$ 0.5	$ 0.6	1.1	$ 1.2
Project worth upon completion \| $			$ 15.2
Finite-lived intangible assets, average useful life \| years			10.0
In-Process Research and Development [Member]
Amortization expense \| $			$ 17.4
Finite-lived intangible assets, average useful life \| years			8		8

Goodwill And Intangible Assets (Summary Of Reconciliation Of Cost Of Goodwill) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jul. 01, 2011	Dec. 31, 2010
Goodwill	$ 623.9	$ 615.9
Accumulated Amortization	(9.8)	(9.8)
Impairment Losses	(414.9)	(414.9)
Carrying Value	199.2	191.2
Goodwill Acquired	8.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Automotive & Power Group: Analog Automotive [Member] \| Cherry Acquisition [Member]
Goodwill	21.8	21.8
Accumulated Amortization	(4.2)	(4.2)
Impairment Losses	0.0	0.0
Carrying Value	17.6	17.6
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Computing & Consumer Products: Signal and Interface [Member] \| Cherry Acquisition [Member]
Goodwill	29.1	29.1
Accumulated Amortization	(5.6)	(5.6)
Impairment Losses	0.0	0.0
Carrying Value	23.5	23.5
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Standard Products: Small Signal [Member] \| Leshan Additional Interest [Member]
Goodwill	3.8	3.8
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	3.8	3.8
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Industrial [Member] \| AMIS Acquisition [Member]
Goodwill	238.7	238.7
Accumulated Amortization	0.0	0.0
Impairment Losses	(214.7)	(214.7)
Carrying Value	24.0	24.0
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Foundry [Member] \| AMIS Acquisition [Member]
Goodwill	146.2	146.2
Accumulated Amortization	0.0	0.0
Impairment Losses	(131.4)	(131.4)
Carrying Value	14.8	14.8
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Medical Products [Member] \| AMIS Acquisition [Member]
Goodwill	79.7	79.7
Accumulated Amortization	0.0	0.0
Impairment Losses	(59.9)	(59.9)
Carrying Value	19.8	19.8
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Medical Products [Member] \| SDT Acquisition [Member]
Goodwill	8.7	8.7
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	8.7	8.7
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Military or Aerospace [Member] \| AMIS Acquisition [Member]
Goodwill	44.8	44.8
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	44.8	44.8
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Standard Products: Memory Products [Member] \| Catalyst Acquisition [Member]
Goodwill	14.1	14.1
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	14.1	14.1
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Protection Products [Member] \| PulseCore Acquisition [Member]
Goodwill	8.9	8.9
Accumulated Amortization	0.0	0.0
Impairment Losses	(8.9)	(8.9)
Carrying Value	0.0	0.0
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Standard Products: Filter Products [Member] \| CMD Acquisition [Member]
Goodwill	20.1	20.1
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	20.1	20.1
Goodwill Acquired	0.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	0.0
Digital & Mixed-Signal Product Group: Sensor Products [Member] \| ISBU Acquisition [Member]
Goodwill	8.0	0.0
Accumulated Amortization	0.0	0.0
Impairment Losses	0.0	0.0
Carrying Value	8.0	$ 0.0
Goodwill Acquired	8.0
Purchase Price Adjustments	0.0
Accumulated Impairment Losses	$ 0.0

Goodwill And Intangible Assets (Summary Of Intangible Assets, Net) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jul. 01, 2011 USD ($) years	Dec. 31, 2010 USD ($) years
Original Cost	$ 510.1	$ 431.6
Accumulated Amortization	(116.4)	(94.2)
Foreign Currency Translation Adjustment	(27.5)	(27.2)
Impairment	(7.2)	(7.2)
Carrying Value	$ 359.0	303.0
Useful Life (in years) \| years	10.0
Useful Life, Minimum (in years) \| years	1
Useful Life, Maximum (in years) \| years	18
Intellectual Property [Member]
Original Cost	$ 13.9	13.9
Accumulated Amortization	(7.9)	(7.0)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	$ 6.0	$ 6.9
Useful Life, Minimum (in years) \| years	5	5
Useful Life, Maximum (in years) \| years	12	12
Assembled Workforce [Member]
Original Cost	$ 6.7	$ 6.7
Accumulated Amortization	(6.7)	(6.1)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	$ 0.0	$ 0.6
Useful Life (in years) \| years	5	5
Customer Relationships [Member]
Original Cost	$ 280.1	$ 250.5
Accumulated Amortization	(60.3)	(51.2)
Foreign Currency Translation Adjustment	(27.5)	(27.2)
Impairment	(3.2)	(3.2)
Carrying Value	$ 189.1	$ 168.9
Useful Life, Minimum (in years) \| years	5	5
Useful Life, Maximum (in years) \| years	18	18
Non-compete Agreements [Member]
Original Cost	$ 0.5	$ 0.5
Accumulated Amortization	(0.5)	(0.5)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	0.0	0.0
Patents [Member]
Original Cost	43.7	16.7
Accumulated Amortization	(7.1)	(4.2)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	$ 36.6	$ 12.5
Useful Life (in years) \| years	12	12
Developed Technology [Member]
Original Cost	$ 130.0	$ 113.0
Accumulated Amortization	(29.6)	(22.5)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	(2.0)	(2.0)
Carrying Value	$ 98.4	$ 88.5
Useful Life, Minimum (in years) \| years	5	5
Useful Life, Maximum (in years) \| years	12	12
Trademarks [Member]
Original Cost	$ 14.0	$ 11.0
Accumulated Amortization	(2.5)	(1.7)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	$ 11.5	$ 9.3
Useful Life (in years) \| years	15	15
In-Process Research and Development [Member]
Original Cost	$ 19.4	$ 18.3
Accumulated Amortization	0.0	0.0
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	(2.0)	(2.0)
Carrying Value	$ 17.4	$ 16.3
Useful Life (in years) \| years	8	8
Acquired Software [Member]
Original Cost	$ 1.0	$ 1.0
Accumulated Amortization	(1.0)	(1.0)
Foreign Currency Translation Adjustment	0.0	0.0
Impairment	0.0	0.0
Carrying Value	$ 0.0	$ 0.0
Useful Life (in years) \| years	2	2
Backlog [Member]
Original Cost	$ 0.8
Accumulated Amortization	(0.8)
Foreign Currency Translation Adjustment	0.0
Impairment	0.0
Carrying Value	$ 0.0
Useful Life (in years) \| years	0.3

Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) $ in Millions	6 Months Ended
	Jul. 01, 2011 USD ($)
Goodwill And Intangible Assets
Remainder of 2011	$ 27.5
2012	40.6
2013	35.9
2014	35.7
2015	34.6
Thereafter	167.3
Total estimated amortization expense	$ 341.6

Restructuring, Asset Impairments and Other, Net (Narrative) (Details) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 01, 2011 USD ($)	Jul. 01, 2011 USD ($) employees	Dec. 31, 2010 USD ($)
Exit costs		$ 0.3
Other [Member]
Employee separation charges	$ 2.5	10.9
Exit costs	(0.3)	(1.8)
Cumulative restructuring charges, net	5.1	17.5
Other costs associated with damaged inventory and other assets	2.3	4.8
Restructuring Activities Related To The 2011 Closure Of The Phoenix, Arizona Wafer Manufacturing Facility [Member]
Employee separation charges		$ 2.5
Total number of employees notified to be terminated \| employees		166
Restructuring Activities Related To The 2011 Acquisition Of SANYO Semiconductor [Member]
Employee separation charges		$ 8.4
Exit costs	$ 1.5	$ 1.5
Number of employees terminated \| employees		280
Cumulative restructuring charges, net		$ 9.9
Restructuring Activities Related To 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member]
Exit costs		$ 0.1
Total number of employees notified to be terminated		27
Number of Former Executive Officers Notified and Terminated		5
Number of employees terminated		27
Cumulative restructuring charges, net		$ 3.6
Restructuring Activities Related To 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member] \| Cash Employee Separation Charges [Member]
Employee separation charges		3.5
Restructuring Activities Related To 2009 Global Workforce Reduction [Member]
Employee separation charges		13.0
Number of employees terminated			570
Acquisition Of AMIS Holdings, Inc. [Member]
Employee separation charges			$ 0.2
Exit costs			$ 9.8
Restructuring activities accrued liabilities		$ 10.0

Restructuring, Asset Impairments and Other, Net (Termination and Related Payments) (Details) $ in Millions	6 Months Ended
	Jul. 01, 2011 USD ($)
Restructuring Activities Related To The 2011 Closure Of The Phoenix, Arizona Wafer Manufacturing Facility [Member] \| Estimated Employee Separation Costs [Member]
Balance at Beginning of Period	$ 0.0
Charges	2.5
Usage	0.0
Adjustments	0.0
Balance at End of Period	2.5
Restructuring Activities Related To The 2011 Closure Of The Phoenix, Arizona Wafer Manufacturing Facility [Member] \| Estimated Costs To Exit [Member]
Balance at Beginning of Period	0.0
Charges	0.3
Usage	0.0
Adjustments	0.0
Balance at End of Period	0.3
Restructuring Activities Related To The 2011 Acquisition Of SANYO Semiconductor [Member] \| Estimated Employee Separation Costs [Member]
Balance at Beginning of Period	0.0
Charges	8.4
Usage	(8.4)
Adjustments	0.0
Balance at End of Period	0.0
Restructuring Activities Related To The 2011 Acquisition Of SANYO Semiconductor [Member] \| Estimated Costs To Exit [Member]
Balance at Beginning of Period	0.0
Charges	1.5
Usage	(1.5)
Adjustments	0.0
Balance at End of Period	0.0
Restructuring Activities Related To 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member] \| Cash Employee Separation Charges [Member]
Balance at Beginning of Period	1.0
Charges	0.0
Usage	(0.7)
Adjustments	0.0
Balance at End of Period	0.3
Restructuring Activities Related To 2010 Acquisition Of California Micro Devices Corporation ("CMD") [Member] \| Exit Costs [Member]
Balance at Beginning of Period	0.1
Charges	0.0
Usage	0.0
Adjustments	0.0
Balance at End of Period	0.1
Restructuring Activities Related To 2009 Global Workforce Reduction [Member] \| Cash Employee Separation Charges [Member]
Balance at Beginning of Period	0.2
Charges	0.0
Usage	(0.2)
Adjustments	0.0
Balance at End of Period	0.0
Acquisition Of AMIS Holdings, Inc. [Member] \| Estimated Employee Separation Costs [Member]
Balance at Beginning of Period	0.2
Usage	0.0
Adjustments	0.0
Balance at End of Period	0.2
Acquisition Of AMIS Holdings, Inc. [Member] \| Estimated Costs To Exit [Member]
Balance at Beginning of Period	9.8
Usage	(0.3)
Adjustments	0.0
Balance at End of Period	$ 9.5

Restructuring, Asset Impairments and Other, Net (Reconciliation of "Restructuring, Asset Impairment and Other, Net" Caption on the Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 01, 2011	Jul. 01, 2011
Exit costs		$ (0.3)
Other [Member]
Cash employee separation charges	$ 2.5	10.9
Exit costs	0.3	1.8
Assets damaged related to Japanese earthquake	2.3	4.8
Restructuring Reserve, Period Increase (Decrease), Total	$ 5.1	$ 17.5

- Definition

The charge against earnings in the period, comprised of costs incurred associated with an exit or disposal activity other than for a discontinued operations as defined under generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References + Details

- Definition

The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

+ References + Details

Balance Sheet Information (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 01, 2011	Jul. 01, 2011	Dec. 31, 2010
Accrued pension liability underfunded plans	$ 76.9	$ 76.9	$ 22.7
Pension asset overfunded plans	12.2	12.2	$ 13.4
Acquisition of SANYO Semiconductor Co., LTD [Member]
Accrued pension liability underfunded plans	51.2	51.2
SANYO Electric Multiemployer [Member]
Accrued pension liability accrued expenses	2.9	5.8
Defined benefit pension plan, liabilities	$ 136.3	$ 136.3

- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6410544&loc=d3e1703-114919

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 7: 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 8: 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

+ Details

Balance Sheet Information (Schedule of Balance Sheet Information) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Balance Sheet Information
Accounts receivable	$ 584.2	$ 301.9
Less: Allowance for doubtful accounts	(8.4)	(7.3)
Receivables, net	575.8	294.6
Raw materials	70.2	49.0
Work in process	440.6	210.9
Finished goods	238.4	100.9
Inventories, net	749.2	360.8
Deposits	3.2	1.9
Prepaid Expenses	33.3	22.2
Tax Receivables	24.1	14.9
Other	25.6	24.6
Other Current Assets	86.2	63.6
Land	85.0	48.3
Buildings	556.2	484.4
Machinery and equipment	1,890.8	1,631.1
Total property, plant and equipment	2,532.0	2,163.8
Less: Accumulated depreciation	(1,381.1)	(1,299.5)
Property, plant and equipment, net	1,150.9	864.3
Accrued payroll	118.3	73.1
Sales related reserves	42.6	36.5
Restructuring reserves	12.9	11.3
Accrued pension liability	0.3	0.3
Other	47.3	41.4
Accrued Liabilities, Current, Total	221.4	162.6
Foreign currency translation adjustments	(54.3)	(58.8)
Unrealized prior service cost of defined benefit pension plan	(0.2)	(0.1)
Prior service cost from pension legal plan amendment	0.0	(0.2)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	$ (54.5)	$ (59.1)

Balance Sheet Information (Warranty Reserves) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Balance Sheet Information
Beginning Balance	$ 3.9	$ 3.2
Provision	1.2	0.4
Usage	(0.5)	(0.1)
Ending Balance	$ 4.6	$ 3.5

Balance Sheet Information (Periodic Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Balance Sheet Information
Service Cost	$ 2.1	$ 1.0	$ 4.4	$ 2.0
Interest cost	1.3	0.8	2.6	1.6
Expected return on plan assets	(1.0)	(0.8)	(2.0)	(1.6)
Amortization of prior service cost	0.1	0.1	0.2	0.2
Total net periodic pension cost	$ 2.5	$ 1.1	$ 5.2	$ 2.2

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: 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 2: 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512136
-Topic 715
-SubTopic 30

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512171
-Topic 715
-SubTopic 60

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, 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 Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

+ Details

Long-Term Debt (Narrative) (Details) ¥ in Millions, $ in Millions	1 Months Ended	6 Months Ended
	Jan. 31, 2011 USD ($)	Jul. 01, 2011 JPY (¥) years	Jul. 01, 2011 USD ($) years	Jul. 01, 2011 USD ($)
SANYO Electric [Member]
Debt instrument maturity, date		January 2018	January 2018
Loan agreement period (years)	7
Unsecured loan principal amount	$ 377.5			$ 358.6
Unsecured loan unpaid balance				122.7
Principal payment of loan, quarterly			$ 9.4
January 2011 Japanese Loan [Member]
Loans payable to bank		¥ 202.5		2.5
Loan agreement period (years) \| years		5	5
Principal outstanding balance of bank loans \| ¥		¥ 450.0
Principal payment of loan, monthly		¥ 7.5	$ 0.1
March 2011 Chinese Loans [Member]
Credit facility borrowing capacity				7.0
Loans payable to bank				7.0
Loan agreement period (years)		2	2
June 2011 Philippine Loan [Member]
Credit facility borrowing capacity				10.0
Loans payable to bank				10.0
Debt instrument maturity, date		December 2011	December 2011
May 2011 Singapore Loan [Member]
Credit facility borrowing capacity				35.0
Loans payable to bank				$ 15.0
Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]
Debt instrument maturity year		2024	2024
Convertible senior percentage		0.00%		0.00%
1.875% Convertible Senior Subordinated Notes Due 2025 [Member]
Debt instrument maturity year		2025	2025
Convertible senior percentage		1.875%		1.875%
2.625% Convertible Senior Subordinated Notes Due 2026 [Member]
Debt instrument maturity year		2026	2026
Convertible senior percentage		2.625%		2.625%

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

6 Months Ended

12 Months Ended

Jul. 01, 2011

Dec. 31, 2010

Capital lease obligations

$ 117.4

$ 115.5

Long-term Debt, Total

1,285.4

888.8

Less: Current maturities

(286.7)

(136.0)

Long-term Debt, Excluding Current Maturities, Total

$ 998.7

752.8

U.S. Real Estate Mortgages Payable Monthly Thru Q1 2016 At Average Rate Of 4.857% [Member]

Debt instrument interest rate during the period

4.857%

Debt instrument maturity year

2016

Loan with bank

$ 32.4

33.0

Loan With A Japanese Company Due 2011 Through 2017, Interest Payable Quarterly At 1.99575% [Member]

Debt instrument interest rate during the period

1.99575%

Debt instrument maturity year, start range

2011

Debt instrument maturity year, end range

2017

Loan with bank

$ 358.6

0.0

Zero Coupon Convertible Senior Subordinated Notes Due 2024 [Member]

Convertible senior percentage

0.00%

Debt instrument maturity year

2024

Convertible Senior Subordinated Notes

^[1]

$ 90.8

87.5

1.875% Convertible Senior Subordinated Notes Due 2025 [Member]

Convertible senior percentage

1.875%

Debt instrument maturity year

2025

Convertible Senior Subordinated Notes

^[2]

$ 85.2

82.2

2.625% Convertible Senior Subordinated Notes Due 2026 [Member]

Convertible senior percentage

2.625%

Debt instrument maturity year

2026

Convertible Senior Subordinated Notes

^[3]

$ 421.3

$ 410.1

Loan With British Finance Company, Interest Payable Monthly At 2.57605% And 2.18% [Member]

Debt instrument interest rate during the period

2.57605%

2.18%

Loan with British finance company

$ 16.0

$ 13.8

Loan With Hong Kong Bank, Interest Payable Weekly At 1.96725% And 2.0325% [Member]

Debt instrument interest rate during the period

1.96725%

2.0325%

Loan with bank

$ 35.0

$ 40.0

Loan With Singapore Bank, Interest Payable Weekly At 1.96% [Member]

Convertible senior percentage

1.96%

Loan with bank

$ 15.0

$ 0.0

Loans With Philippine Banks Due 2011 Through 2015 Interest Payable Quarterly At An Average Rate Of 1.78401% And 1.80446% [Member]

Debt instrument interest rate during the period

1.78401%

1.80446%

Debt instrument maturity year, start range

2011

Debt instrument maturity year, end range

2015

Loan with bank

$ 73.5

$ 68.8

Loans With Chinese Banks Due 2011 Through 2013 Interest Payable Quarterly At An Average Rate Of 4.11040% And 4.23375% [Member]

Debt instrument interest rate during the period

4.1104%

4.23375%

Debt instrument maturity year, start range

2011

Debt instrument maturity year, end range

2013

Loan with bank

$ 34.0

Loans With Japanese Banks Due 2011 Through 2013 Interest Payable Monthly & Semi-Annually At An Average Rate Of 1.47403% And 1.44545% [Member]

Debt instrument interest rate during the period

1.47403%

1.44545%

Debt instrument maturity year, start range

2011

Debt instrument maturity year, end range

2013

Loan with bank

$ 6.2

$ 3.9

[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.

Long-Term Debt (Annual Maturities Relating To Long-Term Debt) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Long-Term Debt
Remainder 2011	$ 101.2
2012	321.2
2013	513.9
2014	71.5
2015	60.7
Thereafter	216.9
Long-term Debt, Total	$ 1,285.4	$ 888.8

Long-Term Debt (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010	Jul. 02, 2010	Dec. 31, 2009
Cash and cash equivalents	$ 756.6	$ 623.3	$ 467.1	$ 525.7
Short-term investments	112.2	0.0
Receivables, net	575.8	294.6
Inventories	749.2	360.8
Other current assets	86.2	63.6
Deferred income taxes, net of allowances	16.9	15.7
Total current assets	2,296.9	1,358.0
Restricted Cash	0.0	142.1
Property, plant and equipment, net	1,150.9	864.3
Deferred income tax, net of allowances	67.4	0.0
Goodwill and other intangible assets	558.2	494.2
Investments and other assets	76.4	60.6
Total assets	4,149.8	2,919.2
Accounts payable	528.9	256.9
Accrued expenses and other current liabilities	512.4	304.5
Deferred income taxes, net of allowances	65.2	0.0
Deferred income on sales to distributors	187.7	149.5
Total current liabilities	1,294.2	710.9
Long-term debt	998.7	752.8
Other long-term liabilities	247.0	49.3
Deferred income tax, net of allowances	22.3	18.2
Intercompany	0.0	0.0
Total liabilities	2,562.2	1,531.2
Total ON Semiconductor Corporation stockholders' equity (deficit)	1,564.1	1,366.0
Minority interests in consolidated subsidiaries	23.5	22.0	21.2	19.6
Total equity	1,587.6	1,388.0
Total liabilities and equity	4,149.8	2,919.2
Issuer [Member]
Cash and cash equivalents	0.0	0.0	0.0	0.0
Short-term investments	0.0
Receivables, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	0.0	0.0
Deferred income taxes, net of allowances	0.0	0.0
Total current assets	0.0	0.0
Restricted Cash		0.0
Property, plant and equipment, net	0.0	0.0
Deferred income tax, net of allowances	0.0	0.0
Goodwill and other intangible assets	0.0	0.0
Investments and other assets	2,162.3	1,946.6
Total assets	2,162.3	1,946.6
Accounts payable	0.0	0.0
Accrued expenses and other current liabilities	91.4	0.6
Deferred income taxes, net of allowances	0.0
Deferred income on sales to distributors	0.0	0.0
Total current liabilities	91.4	0.6
Long-term debt	506.5	579.7
Other long-term liabilities	0.0	0.0
Deferred income tax, net of allowances	0.0	0.0
Intercompany	0.3	0.3
Total liabilities	598.2	580.6
Total ON Semiconductor Corporation stockholders' equity (deficit)	1,564.1	1,366.0
Minority interests in consolidated subsidiaries	0.0	0.0
Total equity	1,564.1	1,366.0
Total liabilities and equity	2,162.3	1,946.6
Guarantor Subsidiaries [Member]
Cash and cash equivalents			0.0	0.0
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	267.5	231.0	343.5	239.7
Short-term investments	0.0
Receivables, net	521.1	247.2
Inventories	691.4	299.9
Other current assets	73.6	48.7
Deferred income taxes, net of allowances	11.3	10.1
Total current assets	1,564.9	836.9
Restricted Cash		0.0
Property, plant and equipment, net	890.6	644.1
Deferred income tax, net of allowances	67.4	0.0
Goodwill and other intangible assets	266.1	200.3
Investments and other assets	847.0	830.0
Total assets	3,636.0	2,511.3
Accounts payable	485.6	213.4
Accrued expenses and other current liabilities	268.1	185.4
Deferred income taxes, net of allowances	65.2
Deferred income on sales to distributors	145.1	115.8
Total current liabilities	964.0	514.6
Long-term debt	74.3	70.1
Other long-term liabilities	221.1	27.8
Deferred income tax, net of allowances	16.7	12.6
Intercompany	55.5	(28.6)
Total liabilities	1,331.6	596.5
Total ON Semiconductor Corporation stockholders' equity (deficit)	2,304.4	1,914.8
Minority interests in consolidated subsidiaries	0.0	0.0
Total equity	2,304.4	1,914.8
Total liabilities and equity	3,638.1	2,511.3
Eliminations [Member]
Cash and cash equivalents	0.0	0.0	0.0	0.0
Short-term investments	0.0
Receivables, net	0.0	0.0
Inventories	7.4	12.9
Other current assets	0.0	0.0
Deferred income taxes, net of allowances	0.0	0.0
Total current assets	7.4	12.9
Restricted Cash		0.0
Property, plant and equipment, net	(3.1)	(3.4)
Deferred income tax, net of allowances	0.0	0.0
Goodwill and other intangible assets	(32.2)	(34.4)
Investments and other assets	(4,504.4)	(3,898.6)
Total assets	(4,532.3)	(3,923.5)
Accounts payable	0.0	0.0
Accrued expenses and other current liabilities	1.7	1.7
Deferred income taxes, net of allowances	0.0
Deferred income on sales to distributors	0.0	0.0
Total current liabilities	1.7	1.7
Long-term debt	0.0	0.0
Other long-term liabilities	0.0	0.0
Deferred income tax, net of allowances	0.0	0.0
Intercompany	205.5	205.5
Total liabilities	207.2	207.2
Total ON Semiconductor Corporation stockholders' equity (deficit)	(4,763.0)	(4,152.7)
Minority interests in consolidated subsidiaries	23.5	22.0
Total equity	(4,739.5)	(4,130.7)
Total liabilities and equity	(4,532.3)	(3,923.5)
Other Subsidiaries [Member]
Cash and cash equivalents	0.0	0.0
Other Subsidiaries [Member] \| Guarantor Subsidiaries [Member]
Cash and cash equivalents	0.0	0.0
Short-term investments	0.0
Receivables, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	0.0	0.0
Deferred income taxes, net of allowances	0.0	0.0
Total current assets	0.0	0.0
Restricted Cash		0.0
Property, plant and equipment, net	2.4	2.6
Deferred income tax, net of allowances	0.0	0.0
Goodwill and other intangible assets	37.2	37.2
Investments and other assets	54.8	51.4
Total assets	94.4	91.2
Accounts payable	0.1	0.1
Accrued expenses and other current liabilities	0.8	0.8
Deferred income taxes, net of allowances	0.0
Deferred income on sales to distributors	0.0	0.0
Total current liabilities	0.9	0.9
Long-term debt	0.0	0.0
Other long-term liabilities	0.4	0.4
Deferred income tax, net of allowances	0.0	0.0
Intercompany	(53.9)	(53.4)
Total liabilities	(52.6)	(52.1)
Total ON Semiconductor Corporation stockholders' equity (deficit)	147.0	143.3
Minority interests in consolidated subsidiaries	0.0	0.0
Total equity	147.0	143.3
Total liabilities and equity	94.4	91.2
SCILLC [Member] \| Guarantor Subsidiaries [Member]
Cash and cash equivalents	489.1	392.3	$ 123.6	$ 286.0
Short-term investments	112.2
Receivables, net	54.7	47.4
Inventories	50.4	48.0
Other current assets	12.6	14.9
Deferred income taxes, net of allowances	5.6	5.6
Total current assets	724.6	508.2
Restricted Cash		142.1
Property, plant and equipment, net	261.0	221.0
Deferred income tax, net of allowances	0.0	0.0
Goodwill and other intangible assets	287.1	291.1
Investments and other assets	1,516.7	1,131.2
Total assets	2,789.4	2,293.6
Accounts payable	43.2	43.4
Accrued expenses and other current liabilities	150.4	116.0
Deferred income taxes, net of allowances	0.0
Deferred income on sales to distributors	42.6	33.7
Total current liabilities	236.2	193.1
Long-term debt	417.9	103.0
Other long-term liabilities	25.5	21.1
Deferred income tax, net of allowances	5.6	5.6
Intercompany	(207.4)	(123.8)
Total liabilities	477.8	199.0
Total ON Semiconductor Corporation stockholders' equity (deficit)	2,311.6	2,094.6
Minority interests in consolidated subsidiaries	0.0	0.0
Total equity	2,311.6	2,094.6
Total liabilities and equity	$ 2,789.4	$ 2,293.6

Long-Term Debt (Condensed Consolidated Statement Of Operations And Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Revenues	$ 905.8	$ 583.3	$ 1,776.4	$ 1,133.5
Cost of revenues	639.7	339.5	1,267.9	661.6
Gross profit	266.1	243.8	508.5	471.9
Research and development	89.2	60.1	180.3	125.3
Selling and marketing	51.2	36.5	100.6	72.1
General and administrative	52.3	35.3	99.4	66.8
Amortization of acquisition related intangible assets	11.4	8.1	21.1	15.9
Restructuring, asset impairments and other, net	5.1	2.3	17.5	6.1
Total operating expenses	209.2	142.3	418.9	286.2
Operating income (loss)	56.9	101.5	89.6	185.7
Interest expense, net	(17.6)	(14.4)	(35.1)	(30.7)
Loss on debt repurchase		(0.7)	0.0	(0.7)
Other	5.7	(3.4)	5.5	(6.2)
Gain (loss) on acquisition	0.0	0.0	69.1	0.0
Equity in earnings	0.0	0.0	0.0	0.0
Income (loss) before income taxes and minority interests	45.0	83.0	129.1	148.1
Income tax provision	(3.2)	(3.4)	(4.0)	(4.8)
Minority interests		0.0
Net income (loss)	41.8	79.6	125.1	143.3
Net income (loss) attributable to minority interests	(0.8)	(0.9)	(1.5)	(1.6)
Net income (loss) attributable to ON Semiconductor Corporation	41.0	78.7	123.6	141.7
Issuer [Member]
Revenues	0.0	0.0	0.0	0.0
Cost of revenues	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Research and development	0.0	0.0	0.0	0.0
Selling and marketing	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
Amortization of acquisition related intangible assets	0.0	0.0	0.0	0.0
Restructuring, asset impairments and other, net	0.0	0.0	0.0	0.0
Total operating expenses	0.0	0.0	0.0	0.0
Operating income (loss)	0.0	0.0	0.0	0.0
Interest expense, net	(13.1)	(12.5)	(26.0)	(25.6)
Loss on debt repurchase		0.0		0.0
Other	0.0	0.1	0.0	0.1
Gain (loss) on acquisition	0.0		0.0
Equity in earnings	54.1	91.1	149.6	167.2
Income (loss) before income taxes and minority interests	41.0	78.7	123.6	141.7
Income tax provision	0.0	0.0	0.0	0.0
Minority interests		0.0
Net income (loss)	41.0	78.7	123.6	141.7
Net income (loss) attributable to minority interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to ON Semiconductor Corporation	41.0	78.7	123.6	141.7
Guarantor Subsidiaries [Member]
Revenues	7.4	0.0		0.0
Cost of revenues	0.2	0.6		1.3
Gross profit	7.2	(0.6)		(1.3)
Research and development	2.7	2.2		4.7
Selling and marketing	0.3	0.2		0.4
General and administrative	0.3	0.2		0.4
Amortization of acquisition related intangible assets	0.0	0.0		0.0
Restructuring, asset impairments and other, net	0.0	0.0		0.0
Total operating expenses	3.3	2.6		5.5
Operating income (loss)	3.9	(3.2)		(6.8)
Interest expense, net	0.0	0.0		0.0
Loss on debt repurchase		0.0		0.0
Other	0.0	0.0		0.0
Gain (loss) on acquisition	0.0
Equity in earnings	1.8	2.3		3.8
Income (loss) before income taxes and minority interests	5.7	(0.9)		(3.0)
Income tax provision	0.0	0.0		0.0
Minority interests		0.0
Net income (loss)	5.7	(0.9)		(3.0)
Net income (loss) attributable to minority interests	0.0	0.0		0.0
Net income (loss) attributable to ON Semiconductor Corporation	5.7	(0.9)		(3.0)
Non-Guarantor Subsidiaries [Member]
Revenues	1,057.5	729.8	2,069.3	1,421.1
Cost of revenues	865.2	538.2	1,689.7	1,056.9
Gross profit	192.3	191.6	379.6	364.2
Research and development	37.8	47.5	80.9	97.0
Selling and marketing	33.0	21.3	63.2	42.1
General and administrative	29.1	29.4	49.6	58.4
Amortization of acquisition related intangible assets	7.9	4.9	14.1	9.7
Restructuring, asset impairments and other, net	2.3	2.3	14.7	6.1
Total operating expenses	110.1	105.4	222.5	213.3
Operating income (loss)	82.2	86.2	157.1	150.9
Interest expense, net	(2.8)	(0.2)	(5.3)	(0.6)
Loss on debt repurchase		0.0		0.0
Other	6.5	(2.7)	2.1	(6.3)
Gain (loss) on acquisition	(0.1)		(0.1)
Equity in earnings	0.0	0.0	0.0	0.0
Income (loss) before income taxes and minority interests	85.8	83.3	153.8	144.0
Income tax provision	(13.3)	(5.4)	(15.1)	(12.1)
Minority interests		0.0
Net income (loss)	72.5	77.9	138.7	131.9
Net income (loss) attributable to minority interests	0.0	0.1	0.0	0.1
Net income (loss) attributable to ON Semiconductor Corporation	72.5	78.0	138.7	132.0
Eliminations [Member]
Revenues	(358.0)	(314.1)	(699.1)	(627.3)
Cost of revenues	(361.2)	(318.4)	(694.1)	(627.7)
Gross profit	3.2	4.3	(5.0)	0.4
Research and development	0.0	0.0	0.0	0.0
Selling and marketing	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
Amortization of acquisition related intangible assets	(1.1)	(1.0)	(2.1)	(2.0)
Restructuring, asset impairments and other, net	0.0	0.0	0.0	0.0
Total operating expenses	(1.1)	(1.0)	(2.1)	(2.0)
Operating income (loss)	4.3	5.3	(2.9)	2.4
Interest expense, net	0.0	0.0	0.0	0.0
Loss on debt repurchase		0.0		0.0
Other	0.0	0.0	0.0	0.0
Gain (loss) on acquisition	0.0		0.0
Equity in earnings	(147.0)	(170.2)	(286.6)	(291.1)
Income (loss) before income taxes and minority interests	(142.7)	(164.9)	(283.7)	(288.7)
Income tax provision	0.0	0.0	0.0	0.0
Minority interests		0.0
Net income (loss)	(142.7)	(164.9)	(283.7)	(288.7)
Net income (loss) attributable to minority interests	(0.8)	(1.0)	(1.5)	(1.7)
Net income (loss) attributable to ON Semiconductor Corporation	(143.5)	(165.9)	(282.2)	(290.4)
SCILLC [Member] \| Guarantor Subsidiaries [Member]
Revenues	198.9	167.6	398.7	339.7
Cost of revenues	135.5	119.1	271.8	231.1
Gross profit	63.4	48.5	126.9	108.6
Research and development	48.7	10.4	93.8	23.6
Selling and marketing	17.9	15.0	36.9	29.6
General and administrative	22.9	5.7	49.4	8.0
Amortization of acquisition related intangible assets	4.6	4.2	9.1	8.2
Restructuring, asset impairments and other, net	2.8	0.0	2.8	0.0
Total operating expenses	96.9	35.3	192.0	69.4
Operating income (loss)	(33.5)	13.2	(65.1)	39.2
Interest expense, net	(1.7)	(1.7)	(3.8)	(4.5)
Loss on debt repurchase		(0.7)		(0.7)
Other	(0.8)	(0.8)	3.4	0.0
Gain (loss) on acquisition	0.1		69.2
Equity in earnings	91.1	76.8	133.5	120.1
Income (loss) before income taxes and minority interests	55.2	86.8	137.2	154.1
Income tax provision	10.1	2.0	11.1	7.3
Minority interests		0.0
Net income (loss)	65.3	88.8	148.3	161.4
Net income (loss) attributable to minority interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to ON Semiconductor Corporation	$ 65.3	$ 88.8	148.3	$ 161.4
Other Subsidiaries [Member]
Revenues			7.5
Cost of revenues			0.5
Gross profit			7.0
Research and development			5.6
Selling and marketing			0.5
General and administrative			0.4
Amortization of acquisition related intangible assets			0.0
Restructuring, asset impairments and other, net			0.0
Total operating expenses			6.5
Operating income (loss)			0.5
Interest expense, net			0.0
Other			0.0
Gain (loss) on acquisition			0.0
Equity in earnings			3.5
Income (loss) before income taxes and minority interests			4.0
Income tax provision			0.0
Net income (loss)			4.0
Net income (loss) attributable to minority interests			0.0
Net income (loss) attributable to ON Semiconductor Corporation			$ 4.0

Long-Term Debt (Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Revenues	$ 905.8	$ 583.3	$ 1,776.4	$ 1,133.5
Cost of revenues	639.7	339.5	1,267.9	661.6
Gross profit	266.1	243.8	508.5	471.9
Research and development	89.2	60.1	180.3	125.3
Selling and marketing	51.2	36.5	100.6	72.1
General and administrative	52.3	35.3	99.4	66.8
Amortization of acquisition-related intangible assets	11.4	8.1	21.1	15.9
Restructuring, asset impairments and other, net	5.1	2.3	17.5	6.1
Total operating expenses	209.2	142.3	418.9	286.2
Operating income (loss)	56.9	101.5	89.6	185.7
Interest expense, net	(17.6)	(14.4)	(35.1)	(30.7)
Loss on debt repurchase		(0.7)	0.0	(0.7)
Gain (loss) on debt prepayment	0.0	(0.7)	0.0	(0.7)
Other	5.7	(3.4)	5.5	(6.2)
Gain (loss) on acquisition	0.0	0.0	69.1	0.0
Equity in earnings	0.0	0.0	0.0	0.0
Income (loss) before income taxes and minority interests	45.0	83.0	129.1	148.1
Income tax provision	(3.2)	(3.4)	(4.0)	(4.8)
Minority interests		0.0
Net income (loss)	41.8	79.6	125.1	143.3
Net income (loss) attributable to minority interests	(0.8)	(0.9)	(1.5)	(1.6)
Net income (loss) applicable to ON Semiconductor Corporation	41.0	78.7	123.6	141.7
Net cash provided by operating activities			261.6	268.4
Purchases of property, plant and equipment			(173.5)	(93.5)
Funds deposited for purchases of property, plant and equipment			0.0	(0.9)
Proceeds from sales of held-to-maturity securities			0.0	45.5
Purchase of businesses, net of cash acquired			(17.9)	(90.2)
Increase in restricted cash			142.1
Proceeds from sales of property, plant and equipment			3.3	0.0
Purchase of held-to-maturity securities			112.2	0.0
Net cash used in investing activities			(158.2)	(139.1)
Intercompany loans			0.0	0.0
Intercompany loan repayments			0.0	0.0
Proceeds from debt issuance			41.3	23.2
Proceeds from issuance of common stock under the employee stock purchase plan	2.1		4.0	3.3
Proceeds from exercise of stock options	16.0		57.1	7.3
Repurchase of treasury stock			(12.1)	(7.0)
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			(18.6)	(15.3)
Repayment of long-term debt			(43.8)	(199.5)
Net cash provided by (used in) financing activities			27.9	(188.0)
Effect of exchange rate changes on cash and cash equivalents			2.0	0.1
Net increase (decrease) in cash and cash equivalents			133.3	(58.6)
Cash and cash equivalents, beginning of period			623.3	525.7
Cash and cash equivalents, end of period	756.6	467.1	756.6	467.1
Issuer [Member]
Revenues	0.0	0.0	0.0	0.0
Cost of revenues	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Research and development	0.0	0.0	0.0	0.0
Selling and marketing	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
Amortization of acquisition-related intangible assets	0.0	0.0	0.0	0.0
Restructuring, asset impairments and other, net	0.0	0.0	0.0	0.0
Total operating expenses	0.0	0.0	0.0	0.0
Operating income (loss)	0.0	0.0	0.0	0.0
Interest expense, net	(13.1)	(12.5)	(26.0)	(25.6)
Loss on debt repurchase		0.0		0.0
Other	0.0	0.1	0.0	0.1
Gain (loss) on acquisition	0.0		0.0
Equity in earnings	54.1	91.1	149.6	167.2
Income (loss) before income taxes and minority interests	41.0	78.7	123.6	141.7
Income tax provision	0.0	0.0	0.0	0.0
Minority interests		0.0
Net income (loss)	41.0	78.7	123.6	141.7
Net income (loss) attributable to minority interests	0.0	0.0	0.0	0.0
Net income (loss) applicable to ON Semiconductor Corporation	41.0	78.7	123.6	141.7
Net cash provided by operating activities			0.0	0.0
Purchases of property, plant and equipment			0.0	0.0
Funds deposited for purchases of property, plant and equipment			0.0	0.0
Proceeds from sales of held-to-maturity securities			0.0	0.0
Purchase of businesses, net of cash acquired			0.0	0.0
Increase in restricted cash			0.0
Proceeds from sales of property, plant and equipment			0.0	0.0
Purchase of held-to-maturity securities			0.0
Net cash used in investing activities			0.0	0.0
Intercompany loans			0.0	0.0
Intercompany loan repayments			0.0	0.0
Proceeds from debt issuance			0.0	0.0
Proceeds from issuance of common stock under the employee stock purchase plan			0.0	0.0
Repurchase of treasury stock			0.0	0.0
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			0.0	0.0
Repayment of long-term debt			0.0	0.0
Net cash provided by (used in) financing activities			0.0	0.0
Effect of exchange rate changes on cash and cash equivalents			0.0	0.0
Net increase (decrease) in cash and cash equivalents			0.0	0.0
Cash and cash equivalents, beginning of period			0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0	0.0	0.0
Guarantor Subsidiaries [Member]
Revenues	7.4	0.0		0.0
Cost of revenues	0.2	0.6		1.3
Gross profit	7.2	(0.6)		(1.3)
Research and development	2.7	2.2		4.7
Selling and marketing	0.3	0.2		0.4
General and administrative	0.3	0.2		0.4
Amortization of acquisition-related intangible assets	0.0	0.0		0.0
Restructuring, asset impairments and other, net	0.0	0.0		0.0
Total operating expenses	3.3	2.6		5.5
Operating income (loss)	3.9	(3.2)		(6.8)
Interest expense, net	0.0	0.0		0.0
Loss on debt repurchase		0.0		0.0
Other	0.0	0.0		0.0
Gain (loss) on acquisition	0.0
Equity in earnings	1.8	2.3		3.8
Income (loss) before income taxes and minority interests	5.7	(0.9)		(3.0)
Income tax provision	0.0	0.0		0.0
Minority interests		0.0
Net income (loss)	5.7	(0.9)		(3.0)
Net income (loss) attributable to minority interests	0.0	0.0		0.0
Net income (loss) applicable to ON Semiconductor Corporation	5.7	(0.9)		(3.0)
Net cash provided by operating activities				0.0
Purchases of property, plant and equipment				0.0
Funds deposited for purchases of property, plant and equipment				0.0
Proceeds from sales of held-to-maturity securities				0.0
Purchase of businesses, net of cash acquired				0.0
Proceeds from sales of property, plant and equipment				0.0
Net cash used in investing activities				0.0
Intercompany loans				0.0
Intercompany loan repayments				0.0
Proceeds from debt issuance				0.0
Proceeds from issuance of common stock under the employee stock purchase plan				0.0
Proceeds from exercise of stock options				0.0
Repurchase of treasury stock				0.0
Payment of capital lease obligation				0.0
Repayment of long-term debt				0.0
Net cash provided by (used in) financing activities				0.0
Effect of exchange rate changes on cash and cash equivalents				0.0
Net increase (decrease) in cash and cash equivalents				0.0
Cash and cash equivalents, beginning of period				0.0
Cash and cash equivalents, end of period		0.0		0.0
Non-Guarantor Subsidiaries [Member]
Revenues	1,057.5	729.8	2,069.3	1,421.1
Cost of revenues	865.2	538.2	1,689.7	1,056.9
Gross profit	192.3	191.6	379.6	364.2
Research and development	37.8	47.5	80.9	97.0
Selling and marketing	33.0	21.3	63.2	42.1
General and administrative	29.1	29.4	49.6	58.4
Amortization of acquisition-related intangible assets	7.9	4.9	14.1	9.7
Restructuring, asset impairments and other, net	2.3	2.3	14.7	6.1
Total operating expenses	110.1	105.4	222.5	213.3
Operating income (loss)	82.2	86.2	157.1	150.9
Interest expense, net	(2.8)	(0.2)	(5.3)	(0.6)
Loss on debt repurchase		0.0		0.0
Other	6.5	(2.7)	2.1	(6.3)
Gain (loss) on acquisition	(0.1)		(0.1)
Equity in earnings	0.0	0.0	0.0	0.0
Income (loss) before income taxes and minority interests	85.8	83.3	153.8	144.0
Income tax provision	(13.3)	(5.4)	(15.1)	(12.1)
Minority interests		0.0
Net income (loss)	72.5	77.9	138.7	131.9
Net income (loss) attributable to minority interests	0.0	0.1	0.0	0.1
Net income (loss) applicable to ON Semiconductor Corporation	72.5	78.0	138.7	132.0
Net cash provided by operating activities			419.2	144.5
Purchases of property, plant and equipment			(130.6)	(65.2)
Funds deposited for purchases of property, plant and equipment			0.0	(0.9)
Proceeds from sales of held-to-maturity securities			0.0	45.5
Purchase of businesses, net of cash acquired			(87.0)	(90.2)
Increase in restricted cash			0.0
Proceeds from sales of property, plant and equipment			3.2	0.0
Purchase of held-to-maturity securities			0.0
Net cash used in investing activities			(214.4)	(110.8)
Intercompany loans			89.9	358.1
Intercompany loan repayments			(258.1)	(282.9)
Proceeds from debt issuance			41.3	23.2
Proceeds from issuance of common stock under the employee stock purchase plan			0.0	0.0
Proceeds from exercise of stock options			0.0	0.0
Repurchase of treasury stock			0.0	0.0
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			(0.2)	(2.3)
Repayment of long-term debt			(43.2)	(26.1)
Net cash provided by (used in) financing activities			(170.3)	70.0
Effect of exchange rate changes on cash and cash equivalents			2.0	0.1
Net increase (decrease) in cash and cash equivalents			36.5	103.8
Cash and cash equivalents, beginning of period			231.0	239.7
Cash and cash equivalents, end of period	267.5	343.5	267.5	343.5
Eliminations [Member]
Revenues	(358.0)	(314.1)	(699.1)	(627.3)
Cost of revenues	(361.2)	(318.4)	(694.1)	(627.7)
Gross profit	3.2	4.3	(5.0)	0.4
Research and development	0.0	0.0	0.0	0.0
Selling and marketing	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
Amortization of acquisition-related intangible assets	(1.1)	(1.0)	(2.1)	(2.0)
Restructuring, asset impairments and other, net	0.0	0.0	0.0	0.0
Total operating expenses	(1.1)	(1.0)	(2.1)	(2.0)
Operating income (loss)	4.3	5.3	(2.9)	2.4
Interest expense, net	0.0	0.0	0.0	0.0
Loss on debt repurchase		0.0		0.0
Other	0.0	0.0	0.0	0.0
Gain (loss) on acquisition	0.0		0.0
Equity in earnings	(147.0)	(170.2)	(286.6)	(291.1)
Income (loss) before income taxes and minority interests	(142.7)	(164.9)	(283.7)	(288.7)
Income tax provision	0.0	0.0	0.0	0.0
Minority interests		0.0
Net income (loss)	(142.7)	(164.9)	(283.7)	(288.7)
Net income (loss) attributable to minority interests	(0.8)	(1.0)	(1.5)	(1.7)
Net income (loss) applicable to ON Semiconductor Corporation	(143.5)	(165.9)	(282.2)	(290.4)
Net cash provided by operating activities			0.0
Purchases of property, plant and equipment				0.0
Funds deposited for purchases of property, plant and equipment			0.0	0.0
Proceeds from sales of held-to-maturity securities			0.0	0.0
Purchase of businesses, net of cash acquired			0.0	0.0
Increase in restricted cash			0.0
Proceeds from sales of property, plant and equipment			0.0	0.0
Purchase of held-to-maturity securities			0.0
Net cash used in investing activities			0.0	0.0
Intercompany loans			0.0	0.0
Intercompany loan repayments			0.0	0.0
Proceeds from debt issuance				0.0
Proceeds from issuance of common stock under the employee stock purchase plan			0.0	0.0
Proceeds from exercise of stock options			0.0	0.0
Repurchase of treasury stock			0.0	0.0
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			0.0	0.0
Repayment of long-term debt			0.0	0.0
Net cash provided by (used in) financing activities			0.0	0.0
Effect of exchange rate changes on cash and cash equivalents			0.0	0.0
Net increase (decrease) in cash and cash equivalents			0.0	0.0
Cash and cash equivalents, beginning of period			0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0	0.0	0.0
SCILLC [Member] \| Guarantor Subsidiaries [Member]
Revenues	198.9	167.6	398.7	339.7
Cost of revenues	135.5	119.1	271.8	231.1
Gross profit	63.4	48.5	126.9	108.6
Research and development	48.7	10.4	93.8	23.6
Selling and marketing	17.9	15.0	36.9	29.6
General and administrative	22.9	5.7	49.4	8.0
Amortization of acquisition-related intangible assets	4.6	4.2	9.1	8.2
Restructuring, asset impairments and other, net	2.8	0.0	2.8	0.0
Total operating expenses	96.9	35.3	192.0	69.4
Operating income (loss)	(33.5)	13.2	(65.1)	39.2
Interest expense, net	(1.7)	(1.7)	(3.8)	(4.5)
Loss on debt repurchase		(0.7)		(0.7)
Other	(0.8)	(0.8)	3.4	0.0
Gain (loss) on acquisition	0.1		69.2
Equity in earnings	91.1	76.8	133.5	120.1
Income (loss) before income taxes and minority interests	55.2	86.8	137.2	154.1
Income tax provision	10.1	2.0	11.1	7.3
Minority interests		0.0
Net income (loss)	65.3	88.8	148.3	161.4
Net income (loss) attributable to minority interests	0.0	0.0	0.0	0.0
Net income (loss) applicable to ON Semiconductor Corporation	65.3	88.8	148.3	161.4
Net cash provided by operating activities			(157.7)	123.9
Purchases of property, plant and equipment			(42.8)	(28.3)
Funds deposited for purchases of property, plant and equipment			0.0	0.0
Proceeds from sales of held-to-maturity securities			0.0	0.0
Purchase of businesses, net of cash acquired			69.1	0.0
Increase in restricted cash			142.1
Proceeds from sales of property, plant and equipment			0.1	0.0
Purchase of held-to-maturity securities			112.2
Net cash used in investing activities			56.3	(28.3)
Intercompany loans			(89.9)	(358.1)
Intercompany loan repayments			258.1	282.9
Proceeds from debt issuance			0.0	0.0
Proceeds from issuance of common stock under the employee stock purchase plan			4.0	3.3
Proceeds from exercise of stock options			57.1	7.3
Repurchase of treasury stock			(12.1)	(7.0)
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			(18.4)	(13.0)
Repayment of long-term debt			(0.6)	(173.4)
Net cash provided by (used in) financing activities			198.2	(258.0)
Effect of exchange rate changes on cash and cash equivalents			0.0	0.0
Net increase (decrease) in cash and cash equivalents			96.8	(162.4)
Cash and cash equivalents, beginning of period			392.3	286.0
Cash and cash equivalents, end of period	489.1	$ 123.6	489.1	$ 123.6
Other Subsidiaries [Member]
Revenues			7.5
Cost of revenues			0.5
Gross profit			7.0
Research and development			5.6
Selling and marketing			0.5
General and administrative			0.4
Amortization of acquisition-related intangible assets			0.0
Restructuring, asset impairments and other, net			0.0
Total operating expenses			6.5
Operating income (loss)			0.5
Interest expense, net			0.0
Other			0.0
Gain (loss) on acquisition			0.0
Equity in earnings			3.5
Income (loss) before income taxes and minority interests			4.0
Income tax provision			0.0
Net income (loss)			4.0
Net income (loss) attributable to minority interests			0.0
Net income (loss) applicable to ON Semiconductor Corporation			4.0
Net cash provided by operating activities			0.1
Purchases of property, plant and equipment			(0.1)
Funds deposited for purchases of property, plant and equipment			0.0
Proceeds from sales of held-to-maturity securities			0.0
Purchase of businesses, net of cash acquired			0.0
Increase in restricted cash			0.0
Proceeds from sales of property, plant and equipment			0.0
Purchase of held-to-maturity securities			0.0
Net cash used in investing activities			(0.1)
Intercompany loans			0.0
Intercompany loan repayments			0.0
Proceeds from debt issuance			0.0
Proceeds from issuance of common stock under the employee stock purchase plan			0.0
Proceeds from exercise of stock options			0.0
Repurchase of treasury stock			0.0
Dividends to minority shareholder of consolidated subsidiary			0.0
Equity injections from Parent			0.0
Subsidiary declared dividend			0.0
Payment of capital lease obligation			0.0
Repayment of long-term debt			0.0
Net cash provided by (used in) financing activities			0.0
Effect of exchange rate changes on cash and cash equivalents			0.0
Net increase (decrease) in cash and cash equivalents			0.0
Cash and cash equivalents, beginning of period			0.0
Cash and cash equivalents, end of period	0.0		0.0
Other Subsidiaries [Member] \| Guarantor Subsidiaries [Member]
Cash and cash equivalents, beginning of period			0.0
Cash and cash equivalents, end of period	$ 0.0		$ 0.0

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010	Dec. 31, 2010	Dec. 31, 2009
Anti-dilutive earnings per share	5,000,000	14,400,000	5,600,000	14,000,000
Shares Of common stock potential purchase warrants held by non-employees			5,300,000
Cash withholding taxes	$ 4.5
Common stock withheld underlying restricted stock units	402,150
Stock reissued or retired			0
Minority interests in consolidated subsidiaries	$ 23.5	$ 21.2	$ 23.5	$ 21.2	$ 22.0	$ 19.6
Net (income) loss attributable to minority interests	$ 0.8	0.9	$ 1.5	1.6
Zero Coupon Convertible Senior Subordinated Notes [Member]
Convertible senior subordinate notes interest rate	0.00%		0.00%
Convertible cash par value interest rate		$ 99.4		$ 99.4
Conversion price		$ 9.82		$ 9.82
2.625% Convertible Senior Subordinated Notes [Member]
Convertible senior subordinate notes interest rate	2.625%	2.625%	2.625%	2.625%
Convertible cash par value interest rate		$ 484.0		$ 484.0
Conversion price		$ 10.50		$ 10.50
1.875% Convertible Senior Subordinated Notes [Member]
Convertible senior subordinate notes interest rate	1.875%		1.875%
Convertible cash par value interest rate		$ 95.0		$ 95.0
Conversion price		$ 7.00		$ 7.00

Equity (Income per Share Calculations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Equity
Net income (loss) applicable to ON Semiconductor Corporation	$ 41.0	$ 78.7	$ 123.6	$ 141.7
Basic weighted average common shares outstanding	446.2	430.3	443.8	429.2
Dilutive effect of stock options and awards	9.1	9.3	10.0	10.2
1.875% convertible senior subordinated notes	4.7	0.0	4.7	0.0
2.625% Convertible Senior Subordinated Notes	0.7	0.0	0.7	0.0
Zero Convertible Coupon Senior Subordinated Notes	0.8	0.0	0.8	0.0
Diluted weighted average common shares outstanding	461.5	439.6	460.0	439.4
Basic	$ 0.09	$ 0.18	$ 0.28	$ 0.33
Diluted	$ 0.09	$ 0.18	$ 0.27	$ 0.32

Employee Stock Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010	Dec. 31, 2010
Aggregate of common stock available for grant	19.1		19.1		24.4
Weighted-average fair value assumptions on stock options granted	$ 4.28	$ 2.94	$ 4.23	$ 3.09
Estimated pre-vesting forfeitures	12.00%	12.00%	12.00%	12.00%
Total Intrinsic value of stock options exercised	$ 11.0		$ 34.5
Cash received from exercise of stock options	16.0		57.1	$ 7.3
Cash received from issuance of shares under ESPP	$ 2.1		$ 4.0	$ 3.3
Employee Stock Purchase Plan [Member]
Aggregate of common stock available for grant	4.7		4.7
Weighted average fair value of shares issued	$ 2.11	$ 1.82	$ 2.07	$ 1.95
Stock Options [Member]
Weighted-average fair value assumptions on stock options granted			$ 10.67
Unrecognized share-based compensation expense on non-vested stock options	$ 8.9		$ 8.9
Restricted Stock Units And Awards [Member]
Restricted stock units vesting period, minimum (in years)			3
Restricted stock units vesting period, maximum (in years)			4
Unrecognized share-based compensation expense on non-vested stock options	$ 33.2		$ 33.2
Weighted average fair value of shares issued			$ 10.70
Number of Shares, Granted			3.9
Director [Member] \| Restricted Stock Units And Awards [Member]
Weighted average fair value of shares issued			$ 10.55
Number of Shares, Granted			0.1

Employee Stock Benefit Plans (Weighted-average Assumptions Of Stock Options Granted) (Details) - Stock Options [Member]	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Volatility	45.10%	48.50%	42.10%	47.40%
Risk-free interest rate	2.00%	2.20%	2.10%	2.30%
Expected term (in years)	4.9	4.9	4.9	5.1

Employee Stock Benefit Plans (Summary Of Stock Option Plans) (Details) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jul. 01, 2011 USD ($) $ / shares shares
Employee Stock Benefit Plans
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	0.3
Weighted-Average Exercise Price, Granted \| $ / shares	$ 10.82
Number of Shares, Exercised \| shares	(8.3)
Weighted-Average Exercise Price, Exercised \| $ / shares	$ 6.90
Number of Shares, Cancellations \| shares	(0.4)
Weighted-Average Exercise Price, Cancellations \| $ / shares	$ 8.34
Number of Shares, Outstanding at July 1, 2011 \| shares	19.0
Weighted-Average Exercise Price, Outstanding at July 1, 2011 \| $ / shares	$ 7.70
Weighted-Average Remaining Contractual Term (in years), Outstanding at July 1, 2011	4.9
Aggregate Intrinsic Value (In-The-Money), Outstanding at July 1, 2011 \| $	$ 59.9
Number of Shares, Exercisable at July 1, 2011 \| shares	14.8
Weighted-Average Exercise Price, Exercisable at July 1, 2011 \| $ / shares	$ 7.85
Weighted-Average Remaining Contractual Term (in years), Exercisable at July 1, 2011	4.3
Aggregate Intrinsic Value (In-The-Money), Exercisable at July 1, 2011 \| $	$ 45.3

Employee Stock Benefit Plans (Additional Information On Stock Options Outstanding) (Details) shares in Millions	Jul. 01, 2011 $ / shares shares
Less than $10.67 [Member]
Number of Shares, Total \| shares	16.8
Weighted Average Exercise Price, Total	$ 7.09
Shares authorized under stock option plans exercise price	$ 10.67
Above $10.67 [member]
Number of Shares, Total \| shares	2.2
Weighted Average Exercise Price, Total	$ 12.35
Shares authorized under stock option plans exercise price	$ 10.67
Total Outstanding [Member]
Number of Shares, Total \| shares	19.0
Weighted Average Exercise Price, Total	$ 7.70
Exercisable [Member] \| Less than $10.67 [Member]
Number of Shares \| shares	12.8
Weighted Average Exercise Price	$ 7.13
Exercisable [Member] \| Above $10.67 [member]
Number of Shares \| shares	2.0
Weighted Average Exercise Price	$ 12.47
Exercisable [Member] \| Total Outstanding [Member]
Number of Shares \| shares	14.8
Weighted Average Exercise Price	$ 7.85
Unexercisable [Member] \| Less than $10.67 [Member]
Number of Shares \| shares	4.0
Weighted Average Exercise Price	$ 6.99
Unexercisable [Member] \| Above $10.67 [member]
Number of Shares \| shares	0.2
Weighted Average Exercise Price	$ 11.19
Unexercisable [Member] \| Total Outstanding [Member]
Number of Shares \| shares	4.2
Weighted Average Exercise Price	$ 7.20

Employee Stock Benefit Plans (Summary Of Restricted Stock Units Granted) (Details) - Restricted Stock Units And Awards [Member] - $ / shares shares in Millions	6 Months Ended
	Jul. 01, 2011
Number of Shares, Nonvested shares of restricted stock units at December 31, 2010	12.3
Weighted-Average Grant Date Fair Value, Nonvested shares of restricted stock units at December 31, 2010	$ 5.19
Number of Shares, Granted	3.9
Weighted-Average Grant Date Fair Value, Granted	$ 10.70
Number of Shares, Released	(3.5)
Weighted-Average Grant Date Fair Value, Released	$ 4.91
Number of Shares, Forfeited	(0.8)
Weighted-Average Grant Date Fair Value, Forfeited	$ 7.97
Number of Shares, Nonvested shares of restricted stock units at July 1, 2011	11.9
Weighted-Average Grant Date Fair Value, Nonvested shares of restricted stock units at July 1, 2011	$ 6.88

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References + Details

Employee Stock Benefit Plans (Weighted-Average Assumptions With Employee Stock Purchase Plan) (Details) - Employee Stock Purchase Plan [Member]	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Expected life (in years)	0.25	0.25	0.25	0.25
Risk-free interest rate	0.10%	0.20%	0.10%	0.10%
Volatility	34.00%	38.00%	31.00%	42.00%

Employee Stock Benefit Plans (Summary Of Share-Based Compensation Expense) (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jul. 01, 2011

Jul. 02, 2010

Jul. 01, 2011

Jul. 02, 2010

Share-based compensation expense before income taxes

$ 10.5

$ 15.4

$ 20.9

$ 29.1

Related income tax benefits

^[1]

0.0

Share-based compensation expense, net of taxes

10.5

15.4

20.9

29.1

Cost Of Revenues [Member]

Share-based compensation expenses

1.7

3.3

3.6

6.6

Research And Development [Member]

Share-based compensation expenses

1.9

2.7

3.9

5.2

Selling And Marketing [Member]

Share-based compensation expenses

1.7

2.0

3.6

4.6

General And Administrative [Member]

Share-based compensation expenses

5.2

7.0

9.8

12.3

Restructuring [Member]

Share-based compensation expenses

$ 0.0

$ 0.4

$ 0.0

$ 0.4

[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

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	9 Months Ended
	Jul. 01, 2011	Oct. 06, 2009
Receivables from subsidiaries	$ 0.1
Credit commitment outstanding	3.8
Guarantee rights to mortgage	3.0
Guarantees related to capital lease obligations	129.7
Expected operating leases cash payments and expenses total	122.8
Payments for legal settlements		$ 586.0
Payments for underwriting expense		$ 100.0
Letter Of Credit [Member]
Credit commitment outstanding	$ 9.3

- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 2
-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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 7
-Section 03
-Paragraph 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 16, 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 5: 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.(k)(1))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.3)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(3))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Commitments And Contingencies (Operating Leases Future Minimum Payments Receivable) (Details) $ in Millions	Jul. 01, 2011 USD ($)
Commitments And Contingencies
Remainder of 2011	$ 13.5
2012	25.1
2013	20.1
2014	17.5
2015	15.7
Thereafter	30.9
Total	$ 122.8

Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 01, 2011	Dec. 31, 2010
Fair Value Of Financial Instruments
Direct investments	$ 0.0
Discount rate to determine fair value of financial instruments (minimum)	0.93%
Discount rate to determine fair value of financial instruments (maximum)	4.05%
Short Term Investments	$ 112.2	$ 0.0
Unrealized Loss on Securities	$ 1.1

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Total cash, cash equivalents, short-term investments	$ 868.8	$ 623.3
Total financial assets	870.1	624.4
Quoted Prices in Active Markets (Level 1) [Member]
Total cash, cash equivalents, short-term investments	867.7	623.3
Total financial assets	869.0	624.4
Demand and Time Deposits [Member]
Cash and cash equivalents	454.9	309.4
Demand and Time Deposits [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Cash and cash equivalents	454.9	309.4
Money Market Funds [Member]
Cash and cash equivalents	46.1	46.1
Money Market Funds [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Cash and cash equivalents	46.1	46.1
Treasuries And Agencies [Member]
Cash and cash equivalents	249.2	267.8
Treasuries And Agencies [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Cash and cash equivalents	249.2	267.8
Commercial Paper [Member]
Cash and cash equivalents	5.0	0.0
Short-term investments	40.0	0.0
Commercial Paper [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Cash and cash equivalents	5.0	0.0
Short-term investments	40.0	0.0
Foreign Currency Exchange Contracts [Member]
Other Current Assets	1.3	1.1
Liabilities	0.8	0.6
Foreign Currency Exchange Contracts [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Other Current Assets	1.3	1.1
Liabilities	0.8	0.6
Corporate Bonds [Member]
Cash and cash equivalents	1.4	0.0
Short-term investments	72.2	0.0
Corporate Bonds [Member] \| Quoted Prices in Active Markets (Level 1) [Member]
Cash and cash equivalents	1.4	0.0
Short-term investments	$ 71.1	$ 0.0

Fair Value Of Financial Instruments (Carrying Amounts And Fair Values Of Long-Term Borrowings) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Quoted Prices in Active Markets (Level 1) [Member]
Carrying Amount	$ 675.2	$ 579.7
Fair Value	853.3	818.0
Level 3 [Member]
Carrying Amount	538.4	160.7
Fair Value	$ 503.8	$ 155.1

Segment Information (Narrative) (Details)	3 Months Ended		6 Months Ended
Segment Information (Narrative) (Details)	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Segment Information
Customers revenue as a percentage of total revenue	10.00%	12.00%	10.00%	12.00%

Segment Information (Segment Information Of Revenues, Gross Profit And Operating Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Revenues from external customers	$ 905.8	$ 583.3	$ 1,776.4	$ 1,133.5
Segment gross profit	284.5	255.3	543.8	497.0
Segment operating income (loss)	82.7	124.8	155.1	235.4
Automotive & Power Group [Member]
Revenues from external customers	155.7	139.2	302.7	265.1
Segment gross profit	54.7	51.9	110.1	96.7
Segment operating income (loss)	22.7	23.7	45.5	39.3
Computing & Consumer Group [Member]
Revenues from external customers	143.8	134.1	277.1	258.3
Segment gross profit	58.2	61.6	112.6	114.5
Segment operating income (loss)	28.1	31.7	49.2	52.4
Digital & Mixed-Signal Product Group [Member]
Revenues from external customers	155.8	134.0	294.8	272.5
Segment gross profit	85.2	77.9	163.5	162.5
Segment operating income (loss)	30.4	31.1	56.7	67.1
Standard Products Group [Member]
Revenues from external customers	176.2	176.0	349.4	337.6
Segment gross profit	64.8	63.9	131.6	123.3
Segment operating income (loss)	43.9	38.3	88.9	76.6
SANYO Semiconductor Products Group [Member]
Revenues from external customers	274.3	0.0	552.4	0.0
Segment gross profit	21.6	0.0	26.0	0.0
Segment operating income (loss)	$ (42.4)	$ 0.0	$ (85.2)	$ 0.0

Segment Information (Reconciliations Of Segment Gross Profit And Segment Operating Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Segment Information
Gross profit for reportable segments	$ 284.5	$ 255.3	$ 543.8	$ 497.0
Other unallocated manufacturing costs	(18.4)	(11.5)	(35.3)	(25.1)
Gross profit	266.1	243.8	508.5	471.9
Operating income for reportable segments	82.7	124.8	155.1	235.4
RestructuringSettlementAndImpairmentProvisions	5.1	2.3	17.5	6.1
Other unallocated manufacturing costs	(18.4)	(11.5)	(35.3)	(25.1)
Other unallocated operating expenses	(2.3)	(9.5)	(12.7)	(18.5)
Operating income	$ 56.9	$ 101.5	$ 89.6	$ 185.7

Segment Information (Revenues By Geographic Location Including Local Sales And Exports) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Revenues	$ 905.8	$ 583.3	$ 1,776.4	$ 1,133.5
United States [Member]
Revenues	134.8	117.9	262.0	237.1
Other Americas [Member]
Revenues	11.1	2.8	17.3	4.5
United Kingdom [Member]
Revenues	107.8	92.8	217.7	186.7
Belgium [Member]
Revenues	2.1	0.0	3.0	0.1
China [Member]
Revenues	277.6	199.4	547.5	371.6
Japan [Member]
Revenues	119.0	17.7	244.4	32.5
Singapore [Member]
Revenues	193.6	134.0	364.4	264.2
Other Asia/Pacific [Member]
Revenues	59.8	18.7	120.1	36.8
Other Europe [member]
Revenues	$ 0.0	$ 0.0	$ 0.0	$ 0.0

Segment Information (Summary Of Property, Plant And Equipment By Geographic Location) (Details) - USD ($) $ in Millions	Jul. 01, 2011	Dec. 31, 2010
Property, plant and equipment, net	$ 1,150.9	$ 864.3
United States [Member]
Property, plant and equipment, net	263.4	223.7
China [Member]
Property, plant and equipment, net	100.3	97.0
Europe [Member]
Property, plant and equipment, net	107.0	104.6
Malaysia [Member]
Property, plant and equipment, net	156.7	137.4
Other Asia/Pacific [Member]
Property, plant and equipment, net	266.0	178.3
Japan [Member]
Property, plant and equipment, net	185.2	70.8
Belgium [Member]
Property, plant and equipment, net	65.2	47.8
Other Americas [Member]
Property, plant and equipment, net	$ 7.1	$ 4.7