Derivatives (Locations and Amounts of Derivative Fair Values) (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Assets	$ 0.0	$ 0.0
Total Liabilities	13.3	7.2
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	12.5	6.7
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.4	0.5
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.4	0.0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.2	0.3
Total Liabilities	1.5	0.8
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	1.5	0.7
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.1
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.2	0.3
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.0	0.0
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.0
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Assets	$ 0.0	$ 0.0