Derivative Instruments and Hedging Activities (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	$ 1.0	$ (22.4)	$ 2.8	$ (15.2)
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(3.7)	4.3	(10.8)	14.6
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	0	(2.3)	0	(1.9)
Commodity [Member]
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	0.2	(7.7)	1.6	(6.0)
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(0.2)	1.6	(2.0)	6.9
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	0	(1.3)	0	(1.3)
Currency [Member]
Derivatives designated as hedging instruments
Amount of gain (loss) recognized in AOCI (Effective Portion)	0.8	(14.7)	1.2	(9.2)
Amount of gain (loss) reclassified from AOCI into Income (Effective Portion)	(3.5)	2.7	(8.8)	7.7
Amount of Gain (Loss) Recognized in Income (Ineffective Portion)	$ 0	$ (1.0)	$ 0	$ (0.6)