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Derivative Financial Instruments - Additional Information (Detail) - Forward Contracts [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Foreign currency forward contracts $ 6   $ 6    
Gain (loss) on foreign currency forward contracts 6 $ (5) 5 $ (6)  
Notional principal associated with contracts 87   87   $ 187
Maximum [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Foreign currency forward contracts         3
Foreign currency forward contracts, liability $ 1   $ 1   $ 2