Derivatives (Fair Value of Derivative Instruments) (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Assets	$ 12.5	$ 11.1
Total Liabilities	0.0	0.8
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	11.0	8.7
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.9	1.9
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.0
Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.0
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.6	0.5
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.8
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total Assets	1.4	1.1
Total Liabilities	2.0	3.2
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	1.2	0.7
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.1	0.2
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	0.0	0.0
Not Designated as Hedging Instrument [Member] | Commodity Futures Contracts [Member] | Other Non-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] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	0.1	0.2
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	2.0	3.2
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	$ 0.0	$ 0.0