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Capital Stock and Stock-Based Awards - Schedule of Stock Unit and Restricted Stock Unit activity (Details) - Stock Units And Restricted Stock Units
 12 Months Ended
May 31, 2023
$ / shares
shares
Restricted stock units and MSPP RSUs  
Nonvested, beginning balance (in shares) | shares 317,593
Granted (in shares) | shares 176,976
Vested (in shares) | shares (153,543)
Forfeited (in shares) | shares (8,440)
Nonvested ending balance (in shares) | shares 332,586
Weighted Average grant date fair value  
Nonvested, beginning balance (in dollars per share) | $ / shares $ 30.17
Granted (in dollars per share) | $ / shares 37.00
Vested (in dollars per share) | $ / shares 31.59
Forfeited (in dollars per share) | $ / shares 33.18
Nonvested, ending balance (in dollars per share) | $ / shares $ 33.08