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Summary of Share-Based Performance-Earned Restricted Stock and Performance Stock Units Activity (Detail) - Performance Earned Restricted Stock Awards and Performance Stock Units - $ / shares
shares in Thousands
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Weighted-Average Grant-Date Fair Value      
Beginning balance $ 69.13    
Shares granted 86.88 $ 80.67 $ 63.52
Shares forfeited 67.94    
Shares vested 63.65    
Ending balance $ 77.71 $ 69.13  
Shares      
Beginning balance 1,116    
Shares granted 432    
Shares forfeited (125)    
Shares vested (313)    
Ending balance 1,110 1,116