Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Financial Assets And (Liabilities) Measured At Fair Value On A Recurring Basis

The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of June 30, 2015:

	Level 1		Level 2			Level 3		Total
	(in millions)
Cash equivalents:
Money market funds	$	154.8	$	—		$	—	$	154.8
Commercial paper	—		6.1			—		6.1
Total cash equivalents	154.8		6.1			—		160.9
Short-term investments:
Time deposits	—		660.9			—		660.9
Available-for-sale investment securities:
U.S. Treasury and agency debt securities	419.7		105.0			—		524.7
Corporate and other debt securities	—		374.0			—		374.0
Certificates of deposit and commercial paper	—		549.7			—		549.7
Asset-backed securities	—		231.2			—		231.2
Municipal debt securities	—		114.3			—		114.3
Mutual funds	—		22.4			—		22.4
Total available-for-sale investment securities	419.7		1,396.6			—		1,816.3
Total short-term investments	419.7		2,057.5			—		2,477.2
Derivative financial instruments - foreign exchange forward contracts:
Other current assets	—		11.4			—		11.4
Accrued expenses and other current liabilities	—		(45.2		)	—		(45.2		)
Other noncurrent assets	—		3.5			—		3.5
Other noncurrent liabilities	—		(16.5		)	—		(16.5		)
Total	$	574.5	$	2,016.8		$	—	$	2,591.3

The following table summarizes our financial assets and (liabilities) measured at fair value on a recurring basis as of December 31, 2014:

	Level 1		Level 2			Level 3		Total
	(in millions)
Cash equivalents:
Money market funds	$	176.5	$	—		$	—	$	176.5
Commercial paper	—		7.4			—		7.4
Total cash equivalents	176.5		7.4			—		183.9
Short-term investments:
Time deposits	—		501.9			—		501.9
Available-for-sale investment securities:
U.S. Treasury and agency debt securities	426.8		117.9			—		544.7
Corporate and other debt securities	—		358.6			—		358.6
Certificates of deposit and commercial paper	—		4.6			—		4.6
Asset-backed securities	—		220.1			—		220.1
Municipal debt securities	—		112.8			—		112.8
Mutual funds	—		21.9			—		21.9
Total available-for-sale investment securities	426.8		835.9			—		1,262.7
Total short-term investments	426.8		1,337.8			—		1,764.6
Derivative financial instruments - foreign exchange forward contracts:
Other current assets	—		2.7			—		2.7
Accrued expenses and other current liabilities	—		(97.3		)	—		(97.3		)
Other noncurrent assets	—		3.9			—		3.9
Other noncurrent liabilities	—		(10.0		)	—		(10.0		)
Total	$	603.3	$	1,244.5		$	—	$	1,847.8