Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Derivatives Not Designated as Hedging Instruments Disclosure) (Details)

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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