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Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) - USD ($)
$ in Millions
Jan. 26, 2018
Apr. 28, 2017
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 741 $ 799
U.S.    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment 548 593
International    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 193 $ 206