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Derivative Financial Instruments - Additional Information (Detail) - Jun. 30, 2015 - USD ($)
$ in Millions
Total
Forward Contracts [Member]  
Derivative Instruments And Hedging Activities Disclosures [Line Items]  
Foreign currency forward contracts $ 6
Notional principal associated with contracts 122
Other Income (Expense) [Member]  
Derivative Instruments And Hedging Activities Disclosures [Line Items]  
Loss on foreign currency forward contracts $ 6