Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Restricted Stock Awards Activity) (Details)

v3.22.2
Stock-Based Compensation Plans (Restricted Stock Awards Activity) (Details) - $ / shares
shares in Millions
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Time-Based Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested, Beginning balance 0.1    
Granted [1] 0.1    
Vested (0.1)    
Forfeited 0.0    
Nonvested, Ending balance 0.1 0.1  
Nonvested, Beginning balance, Weighted-average grant-date fair value per share $ 74.60    
Granted, Weighted-average grant-date fair value per share 114.21 [1] $ 73.93 $ 84.46
Vested, Weighted-average grant-date fair value per share 74.20    
Forfeited, Weighted-average grant-date fair value per share 98.11    
Nonvested, Ending balance, Weighted-average grant-date fair value per share $ 93.15 $ 74.60  
Performance-Based Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested, Beginning balance 0.1    
Granted [1] 0.1    
Vested (0.1)    
Forfeited 0.0    
Nonvested, Ending balance 0.1 0.1  
Nonvested, Beginning balance, Weighted-average grant-date fair value per share $ 69.28    
Granted, Weighted-average grant-date fair value per share 103.97 [1] $ 65.17 $ 80.59
Vested, Weighted-average grant-date fair value per share 65.17    
Forfeited, Weighted-average grant-date fair value per share 107.40    
Nonvested, Ending balance, Weighted-average grant-date fair value per share $ 92.45 $ 69.28  
[1] For performance-based shares, granted number assumes achievement of performance goals at target. Actual number of shares to be earned may differ from this amount.