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Summary of Significant Accounting Policies - Components of Receivables, Net (Detail) - USD ($)
$ in Millions
Jun. 30, 2018
Jun. 30, 2017
Receivables [Abstract]    
Receivables $ 1,829 $ 1,484
Allowances for sales returns (171) (166)
Allowances for doubtful accounts (46) (42)
Receivables, net $ 1,612 $ 1,276