Derivative Instruments and Hedging Activities (Derivatives Not Designated as Hedging Instruments Disclosure) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Amount of Gain/(Loss) Recognized in Income on Derivative	$ 387.0	$ 429.9	$ 488.2	$ 797.1
Customer Supply Agreements [Member] | Product Revenues [Member]
Amount of Gain/(Loss) Recognized in Income on Derivative	46.5	48.4	71.1	68.3
Product Revenues [Member] | Foreign Exchange Contract [Member]
Amount of Gain/(Loss) Recognized in Income on Derivative	2.6	2.2	3.2	5.0
Foreign Exchange Contract [Member] | Other Income (Expense) [Member]
Amount of Gain/(Loss) Recognized in Income on Derivative	48.5	(10.0)	104.5	(7.7)
Product Revenues [Member] | Provisional Pricing Arrangements [Member]
Amount of Gain/(Loss) Recognized in Income on Derivative	$ 289.4	$ 389.3	$ 309.4	$ 731.5