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Segment Geographic and Significant Customer Information - Schedule of Cash, Cash Equivalents and Short-Term Investments (Detail) - USD ($)
$ in Millions
Oct. 30, 2015
Apr. 24, 2015
Segment Reporting Information [Line Items]    
Cash, cash equivalents and short-term investments $ 4,814 $ 5,326
U.S.    
Segment Reporting Information [Line Items]    
Cash, cash equivalents and short-term investments 665 596
International    
Segment Reporting Information [Line Items]    
Cash, cash equivalents and short-term investments $ 4,149 $ 4,730