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Derivative Financial Instruments (Gains/Losses Effect on Accumulated Other Comprehensive Loss and Earnings) (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Foreign Exchange Contracts [Member] | Cash Flow Hedging [Member]
       
Effective portion recognized in other comprehensive loss, net of taxes $ 23 $ (46) $ 59 $ (36)
Commodity Contracts [Member] | Cash Flow Hedging [Member]
       
Effective portion recognized in other comprehensive loss, net of taxes (5) (5) (14) (24)
Foreign Exchange Contracts [Member]
       
Undesignated derivatives recognized in other income/ (expense), net $ (3) $ (8) $ 11 $ (22)