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Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) - USD ($)
$ in Millions
Jan. 29, 2016
Apr. 24, 2015
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 873 $ 1,030
U.S.    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment 750 927
International    
Segment Reporting, Asset Reconciling Item [Line Items]    
Property and equipment $ 123 $ 103