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Debt (Gain Or Loss On The Hedged Item And Offsetting Gain Or Loss On Interest Rate Swaps) (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Other Operating expenses$ (743)$ (699)$ (2,169)$ (2,376)
Derivative Instruments, Gain (Loss) Recognized in Income, Net    
Loss On Notes [Member]
    
Other Operating expenses  (7) 
Gain On Swaps [Member]
    
Other Operating expenses  $ 7