Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012 Interest Rate Swap Agreements	Mar. 31, 2012 Interest Rate Swap Agreements U.S. dollars	Mar. 31, 2012 Foreign Currency Forward Exchange Contracts	Mar. 31, 2011 Foreign Currency Forward Exchange Contracts	Mar. 31, 2012 Cash flow hedges Foreign Currency Forward Exchange Contracts	Mar. 31, 2011 Cash flow hedges Foreign Currency Forward Exchange Contracts	Mar. 31, 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	Mar. 31, 2012 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Dec. 31, 2011 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Mar. 31, 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											$ 98
Average fixed interest rate (as a percent)			1.03%
Variable rate basis				LIBOR
Carrying value / fair value of derivative assets												2.2	0.6	0.5	0.1
Carrying value / fair value of derivative liabilities									0.8	0.6		2.3	6.6	0.2	3.8
Gains (losses) in other comprehensive income, effective portion							4.7	4.8
Notional amount												200.7	168.9
Reduction in gross margin							(0.5)	(0.5)
Net gains (losses) on derivative contracts not designated as hedges					3.2	5.0
Accumulated other comprehensive income, change in fair value of foreign currency forward exchange contracts under hedge designations
Unrealized losses at beginning of period					(4.5)	(0.2)
Losses reclassified to net sales					0.4	0.4
Increase in fair value	3.8	5.3			3.4	3.6
Unrealized (losses) gains at end of period					(0.7)	3.8
Foreign currency gain (loss) reclassified into earnings over next twelve months	$ (0.1)