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Earnings Per Share - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 9 Months Ended
Feb. 29, 2020
Feb. 28, 2021
Feb. 29, 2020
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive options not included in the computation of diluted earnings per share (in shares) 15.8 11.6 31.1