Derivatives - Not Designated (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ 41	$ (70)
Foreign currency forward/option contracts | Cost of sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	(1)	(5)
Foreign currency forward contracts
Derivatives not designated as hedging instruments
Increase (decrease) from previously presented loss recognized in income due to revision		58
Foreign currency forward contracts | Interest expense
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ 42	$ (65)