Fair Value Measurement of Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value Measurement of Assets and Liabilities [Abstract]

Fair Value Measurements of Assets and Liabilities

	As of June 30, 2011
			Fair Value Measurements at Reporting Date Using:
			Quoted
			Prices in
			Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
	Recorded		Assets		Inputs		Inputs
Description	Balance		(Level 1)		(Level 2)		(Level 3)
Assets
Available-for-sale securities
Corporate debt securities	$	240.6	$	—	$	240.6	$	—
U.S. government and agency debt securities		37.9		—		37.9		—
Municipal bonds		1.0		—		1.0		—
Foreign government debt securities		7.5		—		7.5		—
Commercial paper		9.5		—		9.5		—
Certificates of deposit		129.2		—		129.2		—
Total available-for-sale securities		425.7		—		425.7		—
Derivatives, current and long-term
Foreign currency forward contracts and options		6.8		—		6.8		—
Interest rate swaps		5.5		—		5.5		—
	$	438.0	$	—	$	438.0	$	—
Liabilities
Derivatives, current and long-term
Foreign currency forward contracts and options	$	61.9	$	—	$	61.9	$	—
Cross-currency interest rate swaps		3.3		—		3.3		—
	$	65.2	$	—	$	65.2	$	—

	As of December 31, 2010
			Fair Value Measurements at Reporting Date Using:
			Quoted
			Prices in
			Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
	Recorded		Assets		Inputs		Inputs
Description	Balance		(Level 1)		(Level 2)		(Level 3)
Assets
Available-for-sale securities
Corporate debt securities	$	203.8	$	—	$	203.8	$	—
U.S. government and agency debt securities		47.9		—		47.9		—
Municipal bonds		1.1		—		1.1		—
Foreign government debt securities		10.3		—		10.3		—
Commercial paper		16.1		—		16.1		—
Certificates of deposit		131.4		—		131.4		—
Total available-for-sale securities		410.6		—		410.6		—
Derivatives, current and long-term
Foreign currency forward contracts and options		34.5		—		34.5		—
Interest rate swaps		1.5		—		1.5		—
	$	446.6	$	—	$	446.6	$	—
Liabilities
Derivatives, current and long-term
Foreign currency forward contracts and options	$	40.0	$	—	$	40.0	$	—
	$	40.0	$	—	$	40.0	$	—