Fair Value Measurements (Notes)

12 Months Ended

Dec. 31, 2011

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables provide a summary of assets measured at fair value on a recurring basis and as reported in the consolidated balance sheets (in millions):

	Fair Value Measurements at December 31, 2011 Using:
	Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs			Significant Other Unobservable Remaining Inputs
	(Level 1)		(Level 2)			(Level 3)		Total
Assets measured at fair value:
Available-for-sale debt securities:
U.S. government securities	$	149.3	$	151.7		$	—	$	301.0
Government-sponsored enterprise obligations	314.2		116.8			—		431.0
Commercial paper	—		10.0			—		10.0
Corporate debt securities (1)	—		510.3			—		510.3
Certificate of deposit	—		31.8			—		31.8
Asset-backed securities	—		124.7			—		124.7
Money market funds (2)	1,391.3		—			—		1,391.3
Total available-for-sale debt securities	1,854.8		945.3			—		2,800.1
Total available-for-sale securities	1,854.8		945.3			—		2,800.1
Trading securities:
Mutual funds (3)	10.3		—			—		10.3
Total trading securities	10.3		—			—		10.3
Derivative assets:
Foreign exchange contracts	—		0.4			—		0.4
Total derivative assets	—		0.4			—		0.4
Total assets measured at fair value	$	1,865.1	$	945.7		$	—	$	2,810.8
Liabilities measured at fair value:
Derivative liabilities:
Foreign exchange contracts	$	—	$	(9.6	)	$	—	$	(9.6	)
Total derivative liabilities	—		(9.6		)	—		(9.6		)
Total liabilities measured at fair value	$	—	$	(9.6	)	$	—	$	(9.6	)

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(1) Balance includes $1.6 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.

(2) Balance includes $75.1 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.

(3) Balance includes $9.3 million of the Company's non-qualified deferred compensation plan assets and $1.0 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.

	Fair Value Measurements at December 31, 2011 Using:
	Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs			Significant Other Unobservable Remaining Inputs
	(Level 1)		(Level 2)			(Level 3)		Total
Total assets measured at fair value, reported as:
Cash equivalents	$	1,316.2	$	34.5		$	—	$	1,350.7
Short-term investments	168.9		472.4			—		641.3
Long-term investments	303.9		436.8			—		740.7
Restricted cash and investments	76.1		1.6			—		77.7
Prepaid expenses and other current assets	—		0.4			—		0.4
Total assets measured at fair value	$	1,865.1	$	945.7		$	—	$	2,810.8
Total liabilities measured at fair value, reported as:
Other accrued liabilities	$	—	$	(9.6	)	$	—	$	(9.6	)
Total liabilities measured at fair value	$	—	$	(9.6	)	$	—	$	(9.6	)

	Fair Value Measurements at December 31, 2010 Using:
	Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs			Significant Other Unobservable Remaining Inputs
	(Level 1)		(Level 2)			(Level 3)		Total
Assets measured at fair value:
Available-for-sale debt securities:
U.S. government securities (1)	$	54.9	$	180.8		$	—	$	235.7
Government-sponsored enterprise obligations	208.9		10.1			—		219.0
Foreign government debt securities	21.0		26.0			—		47.0
Commercial paper	—		13.5			—		13.5
Corporate debt securities (2)	2.7		461.7			—		464.4
Certificate of deposit	—		21.0			—		21.0
Asset-backed securities	—		90.0			—		90.0
Money market funds (3)	1,154.2		—			—		1,154.2
Total available-for-sale debt securities	1,441.7		803.1			—		2,244.8
Total available-for-sale securities	1,441.7		803.1			—		2,244.8
Trading securities:
Mutual funds	8.1		—			—		8.1
Total trading securities	8.1		—			—		8.1
Derivative assets:
Foreign exchange contracts	—		0.4			—		0.4
Total derivative assets	—		0.4			—		0.4
Total assets measured at fair value	$	1,449.8	$	803.5		$	—	$	2,253.3
Liabilities measured at fair value:
Derivative liabilities:
Foreign exchange contracts	$	—	$	(2.6	)	$	—	$	(2.6	)
Total derivative liabilities	—		(2.6		)	—		(2.6		)
Total liabilities measured at fair value	$	—	$	(2.6	)	$	—	$	(2.6	)

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(1) Balance includes $0.6 million of restricted investments measured at fair market value, related to an acquisition completed in 2005. For additional information regarding the Company's restricted investments, see Note 4, Cash, Cash Equivalents, and Investments, under the heading “Restricted Cash and Investments.” Restricted investments are included in the restricted cash balance in the consolidated balance sheet.

(2) Balance includes $2.7 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.

(3) Balance includes $114.3 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.

	Fair Value Measurements at December 31, 2010 Using:
	Quoted Prices in Active Markets For Identical Assets		Significant Other Observable Remaining Inputs			Significant Other Unobservable Remaining Inputs
	(Level 1)		(Level 2)			(Level 3)		Total
Total assets measured at fair value, reported as:
Cash equivalents	$	1,039.9	$	85.7		$	—	$	1,125.6
Short-term investments	150.7		323.8			—		474.5
Long-term investments	142.2		393.0			—		535.2
Restricted cash	117.0		0.6			—		117.6
Prepaid expenses and other current assets	—		0.4			—		0.4
Total assets measured at fair value	$	1,449.8	$	803.5		$	—	$	2,253.3
Total liabilities measured at fair value, reported as:
Other accrued liabilities	$	—	$	(2.6	)	$	—	$	(2.6	)
Total liabilities measured at fair value	$	—	$	(2.6	)	$	—	$	(2.6	)

The Company's policy is to recognize asset or liability transfers among Level 1, Level 2, and Level 3 as of the actual date of the events or change in circumstances that caused the transfer. During the years ended December 31, 2011, and 2010, the Company had no transfers between levels of the fair value hierarchy of its assets or liabilities measured at fair value.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

As of December 31, 2011, and December 31, 2010, the carrying value of privately-held equity investments measured at fair value on a nonrecurring basis was $0.4 million and $0.8 million, respectively. These privately-held equity investments, which are normally carried at cost, were measured at fair value due to events and circumstances that the Company identified as significantly impacting the fair value of the investments. The Company measured the fair value of its privately held equity investments using an analysis of the financial condition and near-term prospects of the investee, including recent financing activities and their capital structure. As a result, the Company recognized an impairment loss of $1.8 million and $5.5 million, in years ended December 31, 2011 and 2009, respectively, and classified the investment as Level 3 assets due to the absence of quoted market prices and inherent lack of liquidity. There were no such charges in the year ended December 31, 2010.

The Company had no liabilities measured at fair value on a nonrecurring basis as of December 31, 2011 and December 31, 2010.

Assets and Liabilities Not Measured at Fair Value

The carrying amounts of the Company's accounts receivable, financing receivables, accounts payable, and other accrued liabilities approximate fair value due to their short maturities. The fair value of the Company’s long-term debt is disclosed in Note 10, Financing, and was determined using quoted market prices (Level 1).