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Net Income per Share - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 9 Months Ended
Jan. 24, 2020
Jan. 25, 2019
Jan. 24, 2020
Jan. 25, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Outstanding employee equity awards excluded from diluted net income per share calculations 3   3  
Maximum        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Outstanding employee equity awards excluded from diluted net income per share calculations   1   1