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Gains (Losses) Related to Cash Flow Hedges (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Designated Hedge Derivatives | Foreign Exchange Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains recognized in OCI, tax effect $ 28 $ 4