Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Cash and cash equivalents [Abstract]
Cash	$ 426.9		$ 491.7
Money market funds	65.9		133.4
Commercial paper	118.7		140.4
U.S.non-governmental agency asset-backed securities	26.2		27.8
U.S. corporate obligations	1.1		29.1
Non-U.S. bank and other obligations	23.7		76.5
Short-term investments [Abstract]
Commercial paper	214.3		213.5
U.S. Treasury securities	0		10.1
U.S. non-governmental agency asset-backed securities	55.3		77.3
U.S. corporate obligations	75.1		122.6
Derivatives, net asset (liability) [Abstract]
Foreign currency contracts	(4.7)		(13.8)
Interest rate contracts	0		1.4
Total financial instruments	1,002.5		1,310.0
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	2.9		5.8
Derivative Liability, Fair Value	7.6		18.2
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives	3.0	2.5
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(5.1)	(4.2)
Amount of Gain (Loss) Recognized in Income on Derivatives	0.4	(0.3)
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives	3.0	2.5
Foreign exchange contracts [Member] | Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(1.4)	1.6
Foreign exchange contracts [Member] | Cost of goods sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(3.7)	(5.7)
Amount of Gain (Loss) Recognized in Income on Derivatives	0.4	(0.3)
Foreign exchange contracts [Member] | Depreciation expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	0	(0.1)
Buy EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	129.8
Buy GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	35.2
Buy NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	90.0
Buy SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	11.5
Buy USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	65.0
Sell EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(23.9)
Sell GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(6.2)
Sell NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(37.4)
Sell SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
Sell USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(103.7)
2012 [Member] | Buy EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	109.7
2012 [Member] | Buy GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	35.2
2012 [Member] | Buy NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	90.0
2012 [Member] | Buy SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	11.5
2012 [Member] | Buy USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	57.9
2012 [Member] | Sell EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(23.7)
2012 [Member] | Sell GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(6.2)
2012 [Member] | Sell NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(37.4)
2012 [Member] | Sell SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2012 [Member] | Sell USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(80.7)
2013 [Member] | Buy EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	20.1
2013 [Member] | Buy GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Buy NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Buy SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Buy USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	7.1
2013 [Member] | Sell EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(0.2)
2013 [Member] | Sell GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Sell NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Sell SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2013 [Member] | Sell USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(22.5)
2014 [Member] | Sell EUR [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2014 [Member] | Sell GBP [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2014 [Member] | Sell NOK [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2014 [Member] | Sell SGD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	0
2014 [Member] | Sell USD [Member] | FX Forward Contracts [Member]
Derivative [Line Items]
Notional Amount	(0.5)
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	2.4		1.9
Derivative Liability, Fair Value	3.8		7.6
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	1.8		1.9
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Non-current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0.6		0
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	3.7		7.0
Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Non-current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	0.1		0.6
Not Designated as Hedging Instrument [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0.5		3.9
Derivative Liability, Fair Value	3.8		10.6
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives not designated as hedging	5.0	0.4
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Cost of goods sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives not designated as hedging	0.8	0.6
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other costs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives not designated as hedging	4.2
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Interest, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives not designated as hedging	0	(0.2)
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0.5		2.5
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Non-current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0		0
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	3.8		10.6
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Non-current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	0		0
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0		1.4
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Non-current assets [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Asset, Fair Value	0		0
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	0		0
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Non-current liabilities [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Derivative Liability, Fair Value	0		0
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Fixed-rate debt	1.47		1.47
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair value disclosure of fixed-rate debt [Abstract]
Fixed-rate debt	1.25		1.25
Fair value based on quoted prices in active markets for identical assets (Level 1) [Member]
Cash and cash equivalents [Abstract]
Cash	426.9		491.7
Money market funds	65.9		133.4
Commercial paper	0		0
U.S.non-governmental agency asset-backed securities	0		0
U.S. corporate obligations	1.1		29.1
Non-U.S. bank and other obligations	23.7		76.5
Short-term investments [Abstract]
Commercial paper	0		0
U.S. Treasury securities	0		10.1
U.S. non-governmental agency asset-backed securities	0		0
U.S. corporate obligations	75.1		122.6
Derivatives, net asset (liability) [Abstract]
Foreign currency contracts	0		0
Interest rate contracts	0		0
Total financial instruments	592.7		863.4
Fair value based on significant other observable inputs (Level 2) [Member]
Cash and cash equivalents [Abstract]
Cash	0		0
Money market funds	0		0
Commercial paper	118.7		140.4
U.S.non-governmental agency asset-backed securities	26.2		27.8
U.S. corporate obligations	0		0
Non-U.S. bank and other obligations	0		0
Short-term investments [Abstract]
Commercial paper	214.3		213.5
U.S. Treasury securities	0		0
U.S. non-governmental agency asset-backed securities	55.3		77.3
U.S. corporate obligations	0		0
Derivatives, net asset (liability) [Abstract]
Foreign currency contracts	(4.7)		(13.8)
Interest rate contracts	0		1.4
Total financial instruments	409.8		446.6
Fair value based on significant unobservable inputs (Level 3) [Member]
Cash and cash equivalents [Abstract]
Cash	0		0
Money market funds	0		0
Commercial paper	0		0
U.S.non-governmental agency asset-backed securities	0		0
U.S. corporate obligations	0		0
Non-U.S. bank and other obligations	0		0
Short-term investments [Abstract]
Commercial paper	0		0
U.S. Treasury securities	0		0
U.S. non-governmental agency asset-backed securities	0		0
U.S. corporate obligations	0		0
Derivatives, net asset (liability) [Abstract]
Foreign currency contracts	0		0
Interest rate contracts	0		0
Total financial instruments	$ 0		$ 0