Derivative Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended									3 Months Ended																	3 Months Ended
	Dec. 31, 2011 M	Mar. 31, 2012 Interest rate swap contracts	Dec. 31, 2011 Interest rate swap contracts	Apr. 30, 2008 Interest rate swap contracts	Mar. 31, 2012 Foreign exchange contracts	Dec. 31, 2011 Foreign exchange contracts	Mar. 31, 2012 Embedded derivative in purchase and delivery contracts	Dec. 31, 2011 Embedded derivative in purchase and delivery contracts	Mar. 31, 2012 Fixed price commodity contracts	Dec. 31, 2011 Fixed price commodity contracts	Mar. 31, 2012 Designated as a hedging instrument Interest rate swap contracts	Mar. 31, 2011 Designated as a hedging instrument Interest rate swap contracts	Mar. 31, 2012 Not designated as hedging instruments	Mar. 31, 2011 Not designated as hedging instruments	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts	Mar. 31, 2011 Not designated as hedging instruments Foreign exchange contracts	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts AUD:EUR	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts AUD:EUR	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts US Dollar:EUR	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts US Dollar:EUR	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts EUR:JPY	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts MXN:US Dollar	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts MXN:US Dollar	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts US Dollar:CHF	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts US Dollar:CHF	Mar. 31, 2012 Not designated as hedging instruments Foreign exchange contracts EUR:US Dollar	Mar. 31, 2012 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts	Mar. 31, 2011 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts
Derivative Instruments
Fixed interest rate (as a percent)		3.80%
Variable interest rate base		three month LIBOR
Maximum typical maturity period (in months)	12
Notional amount		$ 45.0	$ 49.5	$ 90.0					$ 4.6	$ 3.9					$ 89.7		$ 80.2	$ 3.0	$ 2.1	$ 41.4	$ 48.2	$ 0.3	$ 1.4	$ 2.5	$ 34.1	$ 27.4	$ 9.5
Fair Value of Assets					3.3		0.3	0.6	0.1	0.5					3.3					1.8					1.5
Fair Value of Liabilities		0.9	1.1		0.3	4.2	0.5	0.4	0.1	0.5					0.3		4.2	0.1	0.1		2.9		0.1			1.2	0.1
Notional amount of foreign currency derivative purchase contracts																		2.2	1.5	32.3	35.0		1.2	2.5	32.2	24.5	9.4
Notional amount of derivative purchase contracts							5.6	4.9														25.0
Notional amount of derivative sale contracts							46.5	34.8
Loss recognized in other comprehensive income related to the effective portion											(0.2)	(0.1)
Loss reclassified from other comprehensive income and recognized in net income											(0.4)	(0.5)
Expected accumulated losses to be reclassified into earnings over the next twelve months		0.9
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments													$ 6.7	$ 0.6	$ 7.2	$ (0.1)												$ (0.5)	$ 0.7