XML 98 R85.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Income per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Oct. 26, 2018
Oct. 27, 2017
Oct. 26, 2018
Oct. 27, 2017
Earnings Per Share [Abstract]        
Outstanding employee equity awards excluded from diluted net income per share calculations 0 1,000,000 0 2,000,000