Derivative Financial Instruments - Additional Information (Detail) - Forward Contracts [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Gain (loss) on foreign currency forward contracts	$ (5)	$ 7
Notional principal associated with contracts	77		$ 77		$ 187
Maximum [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Gain (loss) on foreign currency forward contracts			(1)	$ 1
Prepaid and other current assets [Member] | Maximum [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Foreign currency forward contracts	1		1		3
Other current liabilities [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Foreign currency forward contracts, liability					$ 2
Other current liabilities [Member] | Maximum [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Foreign currency forward contracts, liability	$ 1		$ 1