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Comprehensive Income (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Components of comprehensive income    
Net income$ 528$ 404$ 1,412$ 1,222
Currency translation adjustments(117)92(25)16
Changes in derivative financial instruments, net of tax(71)84(29)3
Comprehensive income3405801,3581,241
Comprehensive loss attributable to noncontrolling interest(4) (8)(5)
Comprehensive income attributable to Company$ 344$ 580$ 1,366$ 1,246