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Supplemental Financial Information - Accrued expenses (Detail) - USD ($)
$ in Millions
Jul. 27, 2018
Apr. 27, 2018
Payables And Accruals [Abstract]    
Accrued compensation and benefits $ 268 $ 441
Product warranty liabilities 25 25
Other current liabilities 299 359
Accrued expenses $ 592 $ 825