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STOCK-BASED COMPENSATION - Additional Information (Details)
$ / shares in Units, $ in Millions
12 Months Ended
May 31, 2025
USD ($)
award
$ / shares
shares
May 31, 2024
$ / shares
shares
May 31, 2023
$ / shares
shares
Share Based Compensation Arrangement Stock Options [Abstract]      
Number of award types | award 3    
Maximum term of stock options 10 years    
Restricted stock granted (in shares) | shares   169,371 160,286
Restricted stock, weighted-average fair value (in dollar per share) | $ / shares   $ 239.33 $ 208.57
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Abstract      
Total unrecognized compensation cost, net of estimated forfeitures | $ $ 219    
Stock option remaining weighted-average vesting period 2 years    
Ratio Of Outstanding And Available To Grant Shares To Total Outstanding Common And Equity Compensation Shares And Equity Compensation Shares Available For Grant [Abstract]      
Ratio of outstanding and available to grant shares 9.00%    
Restricted Stock      
Share Based Compensation Arrangement Stock Options [Abstract]      
Stock option vesting period 4 years    
Restricted stock granted (in shares) | shares 150,967    
Restricted stock, weighted-average fair value (in dollar per share) | $ / shares $ 276.44    
Restricted Stock Units (RSUs)      
Share Based Compensation Arrangement Stock Options [Abstract]      
Stock option vesting period 1 year    
Minimum | Employee Stock Option      
Share Based Compensation Arrangement Stock Options [Abstract]      
Stock option vesting period 1 year    
Maximum | Employee Stock Option      
Share Based Compensation Arrangement Stock Options [Abstract]      
Stock option vesting period 4 years