Derivatives (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash Flow Hedging [Member]
Amount of Loss or (Gain) Reclassified from AOCI into Income (Effective Portion):
Effective portion	$ (0.4)		$ 2.5
Cash Flow Hedging [Member] | Cost of Goods Sold [Member] | Commodity Futures Contracts [Member]
Amount of Loss or (Gain) Reclassified from AOCI into Income (Effective Portion):
Effective portion	(0.4)	[1]	1.9	[1]
Cash Flow Hedging [Member] | Interest Expense Net [Member] | Interest Rate Swap [Member]
Amount of Loss or (Gain) Reclassified from AOCI into Income (Effective Portion):
Effective portion	0	[2]	0.6	[2]
Cash Flow Hedging [Member] | Losses and Other Expenses Net [Member] | Commodity Futures Contracts [Member]
Amount of (Gain) or Loss Recognized in Income on Derivatives (Ineffective Portion):
Ineffective portion	0.2	[3]	(0.1)	[3]
Not Designated as Hedging Instrument [Member]
Amount of (Gain) or Loss Recognized in Income on Derivatives:
Amount of (Gain) or Loss Recognized in Income on Derivatives	0.3		(1.3)
Not Designated as Hedging Instrument [Member] | Losses and Other Expenses Net [Member] | Commodity Futures Contracts [Member]
Amount of (Gain) or Loss Recognized in Income on Derivatives:
Amount of (Gain) or Loss Recognized in Income on Derivatives	0.8	[3]	(1.3)	[3]
Not Designated as Hedging Instrument [Member] | Losses and Other Expenses Net [Member] | Foreign Currency Forward Contracts [Member]
Amount of (Gain) or Loss Recognized in Income on Derivatives:
Amount of (Gain) or Loss Recognized in Income on Derivatives	$ (0.5)	[3]	$ 0	[3]

[1] The loss (gain) was recorded in Cost of goods sold in the accompanying Consolidated Statements of Operations.

[2] The loss was recorded in Interest expense, net in the accompanying Consolidated Statements of Operations.

[3] The loss (gain) was recorded in Losses (gains) and other expenses, net in the accompanying Consolidated Statements of Operations.