Derivative Financial Instruments - Derivative Instruments Gain (Loss) Recognized in Income (Detail) (Derivatives not designated as hedging instruments [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 14	$ (1)	$ 5
Foreign forward exchange contracts [Member] | Interest expense, net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 14	$ (1)	$ 5