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Derivatives (Details 4) (Derivatives not designated as hedging instruments, USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivatives not designated as hedging instruments        
Gross notional amount of forward, option and swap contracts not designated as hedging instruments $ 1,100,000,000   $ 1,100,000,000  
Gain (Loss) on Derivative Recognized in income 4,000,000 (20,000,000) 17,000,000 (16,000,000)
Foreign currency forward/option contracts | Cost of Sales
       
Derivatives not designated as hedging instruments        
Gain (Loss) on Derivative Recognized in income 20,000,000 (16,000,000) 5,000,000 (28,000,000)
Foreign currency forward contracts | Interest expense
       
Derivatives not designated as hedging instruments        
Gain (Loss) on Derivative Recognized in income (15,000,000) (4,000,000) 12,000,000 12,000,000
Commodity price swap contracts | Cost of Sales
       
Derivatives not designated as hedging instruments        
Gain (Loss) on Derivative Recognized in income $ (1,000,000)   $ 0