v3.26.1
Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Jul. 23, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average fair value of stock options granted (in dollars per share) $ 51.61 $ 65.29 $ 53.66  
Intrinsic value of options exercised $ 292.3 $ 435.4 $ 359.8  
Proceeds from stock options exercised 3.8 0.9 1.4  
Fair value of vested stock options 37.9 35.9 34.3  
Aggregate intrinsic value of outstanding options 697.9      
Aggregate intrinsic value of exercisable options $ 479.5      
Weighted-average remaining contractual term of stock options exercisable 3 years 6 months      
Unrecognized compensation cost related to unvested stock options and restricted stock $ 300.1      
Weighted-average period of time unrecognized compensation cost will be recognized 2 years 1 month 6 days      
Stock Compensation Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized under plan (in shares)       50,000,000
Shares reserved for future issuance (in shares) 17,978,505      
Share-based compensation $ 128.1 128.3 117.0  
The total income tax benefit recognized in the consolidated income statement for share-based compensation arrangements $ 30.1 $ 32.7 $ 29.8  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum term after grant options may be exercised 10 years      
Award expiration term 10 years      
Stock Options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options vesting period 3 years      
Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options vesting period 5 years      
Restricted Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period of awards 3 years