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Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares
3 Months Ended 6 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2022
Nov. 30, 2021
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 700,000 660,000 720,000 660,000