Derivatives (Details 3) (Derivatives not designated as hedging instruments, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivatives not designated as hedging instruments
Derivative notional amount	$ 6,600
Gain (Loss) on Derivative Recognized in income	(30)	(24)	(2)
Foreign currency forward/option contracts | Cost of Sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	10	20	(24)
Foreign currency forward contracts | Interest expense
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	(40)	(43)	22
Commodity price swap contracts | Cost of Sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ 0	$ (1)