Derivatives (Details 2) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Asset	$ 5.8	$ 18.7
Fair Values of Derivatives Not Designated as Hedging Instruments, Asset	0.7	1.7
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Liability	2.9	3.6
Fair Values of Derivatives Not Designated as Hedging Instruments, Liability	0.1	0
Foreign Currency Froward Contracts [Member] | Other Assets Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Asset	0	0
Fair Values of Derivatives Not Designated as Hedging Instruments, Asset	0.4	0.2
Foreign Currency Froward Contracts [Member] | Other Liabilities Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Liability	0	0
Fair Values of Derivatives Not Designated as Hedging Instruments, Liability	0.1	0
Commodity Futures Contracts [Member] | Other Assets Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Asset	5.8	17.4
Fair Values of Derivatives Not Designated as Hedging Instruments, Asset	0.3	1.4
Commodity Futures Contracts [Member] | Other Assets Non Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Asset	0	1.3
Fair Values of Derivatives Not Designated as Hedging Instruments, Asset	0	0.1
Interest Rate Swap [Member] | Other Liabilities Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Liability	2.2	2.2
Fair Values of Derivatives Not Designated as Hedging Instruments, Liability	0	0
Interest Rate Swap [Member] | Other Liabilities Non Current [Member]
Location and amounts of derivative fair values in Consolidated Balance Sheets and derivative gains and losses in Consolidated Statements of Operations
Fair Values of Derivative Instruments Derivatives Designated as Hedging Instruments, Liability	0.7	1.4
Fair Values of Derivatives Not Designated as Hedging Instruments, Liability	$ 0	$ 0