Derivative Financial Instruments - Derivative Instruments Gain (Loss) Recognized in Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign forward exchange contracts [Member] | Interest expense, net [Member] | Derivatives not designated as hedging instruments [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (14)	$ 4	$ (18)	$ (24)