Annual report pursuant to Section 13 and 15(d)

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

v3.21.2
Stock-Based Compensation Plans (Stock Option Activity) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
May 31, 2021
May 31, 2020
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, Beginning balance, Shares subject to options 4.4  
Granted, Shares subject to options 0.7  
Exercised, Shares subject to options (1.4)  
Forfeited, Shares subject to options (0.1)  
Expired, Shares subject to options  
Outstanding, Ending balance, Shares subject to options 3.6 4.4
Exercisable, Shares subject to options 2.4  
Outstanding, Beginning balance, Weighted-average exercise price per share $ 55.02  
Granted, Weighted-average exercise price per share 73.55  
Exercised, Weighted-average exercise price per share 42.66  
Forfeited, Weighted-average exercise price per share 78.69  
Expired, Weighted-average exercise price per share 36.79  
Outstanding, Ending balance, Weighted-average exercise price per share 62.89 $ 55.02
Exercisable, Weighted-average exercise price per share $ 56.25  
Outstanding, Weighted-average remaining contractual term (years) 6 years 2 months 12 days  
Exercisable, Weighted-average remaining contractual term (years) 5 years  
Outstanding, Aggregate intrinsic value [1] $ 136.8  
Exercisable, Aggregate intrinsic value [1] $ 108.0  
Performance Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, Shares subject to options 0.0 0.0
[1] Total shares valued at the market price of the underlying stock as of May 31, 2021 less the exercise price.