The following tables provide a summary of assets and liabilities measured at fair value on a recurring basis and as reported in the Condensed Consolidated Balance Sheets (in millions):



	Fair Value Measurements at March 31, 2015 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 securities:
Asset-backed securities	$	—	$	308.8		$	—	$	308.8
Certificates of deposit	—		8.2			—		8.2
Commercial paper	—		15.6			—		15.6
Corporate debt securities	—		843.8			—		843.8
Foreign government debt securities	—		34.7			—		34.7
Government-sponsored enterprise obligations	—		190.4			—		190.4
Money market funds⁽¹⁾	776.2		—			—		776.2
Mutual funds⁽²⁾	4.1		—			—		4.1
Publicly-traded equity securities	2.6		—			—		2.6
U.S. government securities	221.6		12.3			—		233.9
Total available-for-sale securities	1,004.5		1,413.8			—		2,418.3
Trading securities in mutual funds⁽³⁾	17.7		—			—		17.7
Privately-held debt and redeemable preferred stock securities	—		—			50.3		50.3
Derivative assets:
Foreign exchange contracts	—		0.5			—		0.5
Total assets measured at fair value	$	1,022.2	$	1,414.3		$	50.3	$	2,486.8
Liabilities measured at fair value:
Derivative liabilities:
Foreign exchange contracts	$	—	$	(6.7	)	$	—	$	(6.7	)
Total liabilities measured at fair value	$	—	$	(6.7	)	$	—	$	(6.7	)

Total assets measured at fair value, reported as:
Cash equivalents	$	735.0	$	15.8		$	—	$	750.8
Restricted investments	45.4		—			—		45.4
Short-term investments	65.2		333.0			—		398.2
Long-term investments	176.6		1,065.0			—		1,241.6
Prepaid expenses and other current assets	—		0.5			—		0.5
Other long-term assets	—		—			50.3		50.3
Total assets measured at fair value	$	1,022.2	$	1,414.3		$	50.3	$	2,486.8

Total liabilities measured at fair value, reported as:
Other accrued liabilities	$	—	$	(6.7	)	$	—	$	(6.7	)
Total liabilities measured at fair value	$	—	$	(6.7	)	$	—	$	(6.7	)

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⁽¹⁾	Balance includes $41.2 million of restricted investments measured at fair market value related to the Company's D&O Trust and acquisition-related escrows.


⁽²⁾	Balance relates to restricted investments measured at fair market value related to the Company's India Gratuity Trust.


⁽³⁾	Balance relates to investments measured at fair value related to the Company's non-qualified deferred compensation plan assets.



	Fair Value Measurements at December 31, 2014 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 securities:
Asset-backed securities	$	—	$	269.0		$	—	$	269.0
Certificates of deposit	—		10.6			—		10.6
Commercial paper	—		20.3			—		20.3
Corporate debt securities	—		738.0			—		738.0
Foreign government debt securities	—		24.6			—		24.6
Government-sponsored enterprise obligations	—		162.1			—		162.1
Money market funds⁽¹⁾	594.2		—			—		594.2
Mutual funds⁽²⁾	4.0		—			—		4.0
Publicly-traded equity securities	2.0		—			—		2.0
U.S. government securities	246.0		—			—		246.0
Total available-for-sale securities	846.2		1,224.6			—		2,070.8
Trading securities in mutual funds⁽³⁾	16.3		—			—		16.3
Privately-held debt and redeemable preferred stock securities	—		—			47.5		47.5
Derivative assets:
Foreign exchange contracts	—		0.1			—		0.1
Total assets measured at fair value	$	862.5	$	1,224.7		$	47.5	$	2,134.7
Liabilities measured at fair value:
Derivative liabilities:
Foreign exchange contracts	$	—	$	(3.9	)	$	—	$	(3.9	)
Total liabilities measured at fair value	$	—	$	(3.9	)	$	—	$	(3.9	)

Total assets measured at fair value, reported as:
Cash equivalents	$	552.9	$	23.7		$	—	$	576.6
Restricted investments	45.2		—			—		45.2
Short-term investments	87.0		245.2			—		332.2
Long-term investments	177.4		955.7			—		1,133.1
Prepaid expenses and other current assets	—		0.1			—		0.1
Other long-term assets	—		—			47.5		47.5
Total assets measured at fair value	$	862.5	$	1,224.7		$	47.5	$	2,134.7

Total liabilities measured at fair value, reported as:
Other accrued liabilities	$	—	$	(3.9	)	$	—	$	(3.9	)
Total liabilities measured at fair value	$	—	$	(3.9	)	$	—	$	(3.9	)

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⁽¹⁾	Balance includes $41.3 million of restricted investments measured at fair market value related to the Company's D&O Trust and acquisition-related escrows.


⁽²⁾	Balance relates to restricted investments measured at fair market value related to the Company's India Gratuity Trust.


⁽³⁾	Balance relates to investments measured at fair value related to the Company's non-qualified deferred compensation plan assets.