Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended				6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Interest Rate Swap Agreements	Dec. 31, 2010 Interest Rate Swap Agreements	Jun. 30, 2012 Interest Rate Swap Agreements U.S. dollars	Jun. 30, 2012 Foreign Currency Forward Exchange Contracts	Jun. 30, 2011 Foreign Currency Forward Exchange Contracts	Jun. 30, 2012 Foreign Currency Forward Exchange Contracts	Jun. 30, 2011 Foreign Currency Forward Exchange Contracts	Jun. 30, 2012 Cash flow hedges Foreign Currency Forward Exchange Contracts	Jun. 30, 2011 Cash flow hedges Foreign Currency Forward Exchange Contracts	Jun. 30, 2012 Cash flow hedges Foreign Currency Forward Exchange Contracts	Jun. 30, 2011 Cash flow hedges Foreign Currency Forward Exchange Contracts	Jun. 30, 2012 Designated as Hedging Instrument Interest Rate Swap Agreements	Dec. 31, 2011 Designated as Hedging Instrument Interest Rate Swap Agreements	Dec. 31, 2010 Designated as Hedging Instrument Interest Rate Swap Agreements	Jun. 30, 2012 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Dec. 31, 2011 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Jun. 30, 2012 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Dec. 31, 2011 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts
Derivative Financial Instruments
Floating rate obligation																$ 75		$ 98
Average fixed interest rate (as a percent)					0.6725%	1.03%
Variable rate basis							LIBOR
Carrying value / fair value of derivative assets																			0.8	0.6	1.0	0.1
Carrying value / fair value of derivative liabilities																0.9	0.6		8.0	6.1	0.4	3.8
Gains (losses) in other comprehensive income, effective portion												(7.8)	2.7	(3.1)	7.5
Notional amount																			275.8	168.9
Recorded in gross margin												(0.8)	1.8	(1.3)	1.3
Net gains (losses) on derivative contracts not designated as hedges								(3.2)	2.7	(0.1)	7.7
Accumulated other comprehensive income, change in fair value of foreign currency forward exchange contracts under hedge designations
Unrealized gains (losses) at beginning of period, net of tax								(0.7)	3.8	(4.5)	(0.2)
(Gains) losses reclassified to net sales								0.5	(1.5)	0.9	(1.1)
Increase (decrease) in fair value	(5.3)	(1.1)	(1.5)	4.2				(5.7)	2.4	(2.3)	6.0
Unrealized gains (losses) at end of period, net of tax								(5.9)	4.7	(5.9)	4.7
Foreign currency gain (loss) reclassified into earnings over next twelve months	$ 3.4		$ 3.4