Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Other Information Pertaining to RSUs) (Details)

v3.24.2
Stock-Based Compensation Plans (Other Information Pertaining to RSUs) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 31, 2024
May 31, 2023
May 31, 2022
Time-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share $ 114.95 [1] $ 127.75 $ 109.81
Weighted-average remaining vesting period (years) [2] 1 year 4 months 24 days 1 year 6 months 1 year 6 months
Total intrinsic value of RSUs vested $ 55.9 $ 58.2 $ 54.7
Aggregate intrinsic value of nonvested RSUs [3] 152.5 141.8 165.2
Total grant-date fair value of RSUs vested $ 41.2 $ 32.7 $ 30.0
Performance-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share $ 114.23 [1] $ 108.31 $ 103.59
Weighted-average remaining vesting period (years) [2] 1 year 1 month 6 days 1 year 9 months 18 days 1 year
Total intrinsic value of RSUs vested $ 0.4 $ 7.8  
Aggregate intrinsic value of nonvested RSUs [3] 30.8 15.7 $ 14.7
Total grant-date fair value of RSUs vested $ 0.4 $ 5.4  
[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] Weighting is based on the number of unvested share units vesting in each future vesting tranche.
[3] Based on the market price of the underlying common stock as of May 31, 2024, 2023 and 2022.