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Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares
3 Months Ended 9 Months Ended
Nov. 27, 2018
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2019
Feb. 28, 2018
Nov. 30, 2018
Restricted shares            
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]            
Shares excluded from the calculation of diluted earnings per share   429,750,000 48,212,000 323,000,000 48,212,000  
Stock appreciation rights (SARs)            
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]            
Shares excluded from the calculation of diluted earnings per share   890,000,000 600,000,000 890,000,000 600,000,000  
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