Derivatives (Details 4) (Derivatives not designated as hedging instruments, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Gains and losses related to derivative instruments 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	38,000,000	(45,000,000)	22,000,000	(30,000,000)
Foreign currency forward/option contracts | Cost of Sales
Gains and losses related to derivative instruments not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	32,000,000	(38,000,000)	4,000,000	(12,000,000)
Foreign currency forward contracts | Interest expense
Gains and losses related to derivative instruments not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ 6,000,000	$ (7,000,000)	$ 18,000,000	$ (18,000,000)