Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivatives designated as hedging instruments [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 4	$ 1
Derivatives designated as hedging instruments [Member] | Forward contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability		1
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	2	1
Derivatives not designated as hedging instruments [Member] | Forward contracts [Member] | Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 2	$ 2