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Net Income per Share - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 6 Months Ended
Oct. 25, 2019
Oct. 26, 2018
Oct. 25, 2019
Oct. 26, 2018
Earnings Per Share [Abstract]        
Outstanding employee equity awards excluded from diluted net income per share calculations 6 0 3 0