Derivatives - Not Designated (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ (132)	$ 88	$ (91)	$ 18
Foreign currency forward/option contracts | Cost of sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	6	(1)	5	(6)
Foreign currency forward contracts
Derivatives not designated as hedging instruments
Increase (decrease) from previously presented gain recognized in income due to revision		40		(18)
Foreign currency forward contracts | Interest expense
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ (138)	$ 89	$ (96)	$ 24