Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (RSU Activity) (Details)

v3.21.2
Stock-Based Compensation Plans (RSU Activity) (Details) - $ / shares
shares in Millions
12 Months Ended
May 31, 2021
May 31, 2020
May 31, 2019
Time-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested, Beginning balance 1.4    
Granted 0.7    
Vested (0.5)    
Forfeited (0.1)    
Nonvested, Ending balance 1.5 1.4  
Nonvested, Beginning balance, Weighted-average grant-date fair value per share $ 61.60    
Granted, Weighted-average grant-date fair value per share 67.92 $ 73.28 $ 62.20
Vested, Weighted-average grant-date fair value per share 57.10    
Forfeited, Weighted-average grant-date fair value per share 64.40    
Nonvested, Ending balance, Weighted-average grant-date fair value per share $ 65.64 $ 61.60  
Performance-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested, Beginning balance 0.1    
Granted [1]    
Vested    
Forfeited    
Nonvested, Ending balance 0.1 0.1  
Nonvested, Beginning balance, Weighted-average grant-date fair value per share $ 80.59    
Granted, Weighted-average grant-date fair value per share [2] [1] $ 80.59
Vested, Weighted-average grant-date fair value per share    
Forfeited, Weighted-average grant-date fair value per share    
Nonvested, Ending balance, Weighted-average grant-date fair value per share $ 80.59 $ 80.59  
[1] For performance-based RSUs, granted number assumes achievement of performance goals at target. Actual number of shares to be earned may differ from this amount.
[2] No performance-based RSUs were granted during fiscal 2021 or fiscal 2019.