Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended					3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2013 item	Sep. 30, 2013 Interest Rate Swap Agreements	Jun. 30, 2012 Interest Rate Swap Agreements	Dec. 31, 2010 Interest Rate Swap Agreements	Sep. 30, 2013 Interest Rate Swap Agreements Minimum	Sep. 30, 2013 Interest Rate Swap Agreements Maximum	Sep. 30, 2013 Interest Rate Swap Agreements U.S. dollars	Sep. 30, 2013 Interest Rate Swap Agreements U.S. dollars	Sep. 30, 2013 Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Designated as Hedging Instrument Interest Rate Swap Agreements	Dec. 31, 2012 Designated as Hedging Instrument Interest Rate Swap Agreements	Jun. 30, 2012 Designated as Hedging Instrument Interest Rate Swap Agreements	Dec. 31, 2010 Designated as Hedging Instrument Interest Rate Swap Agreements	Sep. 30, 2013 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Dec. 31, 2012 Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Designated as Hedging Instrument Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Designated as Hedging Instrument Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Designated as Hedging Instrument Cash flow hedges Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Designated as Hedging Instrument Cash flow hedges Foreign Currency Forward Exchange Contracts	Jun. 30, 2013 Not Designated as Hedging Instrument Interest Rate Swap Agreements	Sep. 30, 2013 Not Designated as Hedging Instrument Interest Rate Swap Agreements	Sep. 30, 2013 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Sep. 30, 2013 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Sep. 30, 2012 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts	Dec. 31, 2012 Not Designated as Hedging Instrument Foreign Currency Forward Exchange Contracts
Derivative Financial Instruments
Floating rate obligation																	$ 75		$ 75	$ 98
Fixed interest rate (as a percent)			0.6725%	1.03%	0.81%	1.03%																					1.03%
Variable rate basis							LIBOR	LIBOR
Deferred expenses released from accumulated other comprehensive income																											0.4
Termination and settlement of derivative in cash		0.5
Carrying value / fair value of derivative assets included in other assets																					9.0	3.6							3.7		3.7		3.1
Carrying value / fair value of derivative liabilities included in other liabilities																	0.7	1.0			0.6	1.6											0.1
Notional amount																					208.5	201.2
Gains (losses) in other comprehensive income, effective portion													9.1	4.8	4.1	1.7												75.0
Recorded in gross margin																							0.2	1.4	0.9	2.8
Number of credit contingency features	0
Net gains (losses) on derivative contracts not designated as hedges																													6.8	1.4	4.3	(1.5)
Accumulated other comprehensive income, change in fair value of foreign currency forward exchange contracts under hedge designations
Unrealized (losses) gains at beginning of period, net of tax									(0.9)	(5.9)	2.4	(4.5)
Losses reclassified to net sales									0.1	0.8	0.7	1.7
Increase (decrease) in fair value									7.5	3.6	3.6	1.3
Unrealized (losses) at end of period, net of tax									6.7	(1.5)	6.7	(1.5)
Foreign currency unrealized losses expected to be reclassified into earnings over next twelve months	$ 3.7