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Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares
12 Months Ended
Nov. 27, 2018
May 31, 2019
May 31, 2018
May 31, 2017
Nov. 30, 2018
Stock-Based Compensation Plans          
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]          
Shares excluded from the calculation of diluted earnings per share   862,500 799,362 606,048  
2.25% Convertible Senior Notes          
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]          
Debt instrument redemption date Nov. 27, 2018        
Debt, interest rate 2.25%       2.25%
Debt instrument maturity year 2020        
Debt conversion, common stock shares issued 598,601