Derivatives (Details 3) (Fair Value, Inputs, Level 2 [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	$ 0.2	$ 0
Derivative Liability, Fair Value	5.9	7.2
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0	0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Assets Non Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0.2	0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	5.9	6.7
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Liabilities Non Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value		0.5
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0	0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	0	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0.3	0.3
Derivative Liability, Fair Value	0.9	0.8
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0	0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Assets Non Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0	0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	0.7	0.7
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Liabilities Non Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	0	0.1
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	0.3	0.3
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	$ 0.2	$ 0