Derivative Instruments and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	$ 2.4	$ (15.4)	$ 17.0
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(13.5)	12.5	16.3
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	0	(2.0)	0
Commodity [Member]
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	1.3	(4.5)	10.4
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(2.2)	5.8	8.8
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	0	(1.3)	0
Currency [Member]
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	1.1	(10.9)	6.6
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(11.3)	6.7	7.5
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	$ 0	$ (0.7)	$ 0