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Summary of Significant Accounting Policies - Components of Receivables, Net (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Jun. 30, 2014
Receivables [Abstract]    
Receivables $ 1,530 $ 1,563
Allowances for returns and doubtful accounts (220) (175)
Receivables, net $ 1,310 $ 1,388