Derivative Financial Instruments - Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Derivatives designated as hedging instruments [Member]
Derivatives Fair Value [Line Items]
Derivative Asset	$ 8	$ 5
Derivatives designated as hedging instruments [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives Fair Value [Line Items]
Derivative Asset	8	4
Derivatives designated as hedging instruments [Member] | Forward contracts [Member] | Prepaid expenses and other [Member]
Derivatives Fair Value [Line Items]
Derivative Asset		1
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Prepaid expenses and other [Member]
Derivatives Fair Value [Line Items]
Derivative Asset		9
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Accrued expenses [Member]
Derivatives Fair Value [Line Items]
Derivative Liability	$ 6	$ 1