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Additional Financial Information - Components of Receivables, Net (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Jul. 01, 2018
Jun. 30, 2018
Receivables [Abstract]      
Receivables $ 1,901   $ 1,829
Allowance for sales returns 0   (171)
Allowance for doubtful accounts (48)   (46)
Receivables, net $ 1,853 $ 1,812 $ 1,612