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Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) - USD ($)
$ in Millions
Oct. 26, 2018
Apr. 27, 2018
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 770 $ 756
U.S.    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment 580 566
International    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 190 $ 190