Derivatives (Details 3) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	[1]	$ 0.0	$ 0.0
Derivative Liability, Fair Value	[1]	5.3	7.2
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	[1]	0.0	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	[1]	0.0	0.0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	[1]	5.1	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	[1]	0.2	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	[1]	0.0	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	0.0	[1]
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	[1]	0.2	0.3
Derivative Liability, Fair Value	[1]	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	[1]	0.0	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	[1]	0.0	0.0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value	[1]	0.8	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	[1]	0.0	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	[1]	0.2	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	[1]	$ 0.1	$ 0.0

[1] All derivative instruments are classified as Level 2 within the fair value hierarchy. See Note 16 for more information.