Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets and liabilities at Fair value net	$ (0.5)	$ (0.2)
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0.3
Derivative Liabilities	(0.2)	0
Designated as Hedging Instrument [Member] | Currency [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0.2	0.2
Derivative Liabilities	(0.5)	(0.7)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets and liabilities at Fair value net	(1.2)	0
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0.1
Derivative Liabilities	(0.9)	0
Not Designated as Hedging Instrument [Member] | Currency [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0.1	0.1
Derivative Liabilities	$ (0.4)	$ (0.2)