Annual report pursuant to Section 13 and 15(d)

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

v3.23.2
Stock-Based Compensation Plans (Other Information Pertaining to RSUs) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 31, 2023
May 31, 2022
May 31, 2021
Time-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share $ 127.75 [1] $ 109.81 $ 67.92
Weighted-average remaining vesting period (years) [2] 1 year 6 months 1 year 6 months 1 year 7 months 6 days
Total intrinsic value of RSUs vested $ 58.2 $ 54.7 $ 32.6
Aggregate intrinsic value of nonvested RSUs [3] 141.8 165.2 152.7
Total grant-date fair value of RSUs vested $ 32.7 $ 30.0 $ 25.6
Performance-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share [4] $ 108.31 [1] $ 103.59 $ 0
Weighted-average remaining vesting period (years) [2],[4] 1 year 9 months 18 days 1 year 1 year 1 month 6 days
Total intrinsic value of RSUs vested [4] $ 7.8    
Aggregate intrinsic value of nonvested RSUs [3],[4] 15.7 $ 14.7 $ 6.2
Total grant-date fair value of RSUs vested [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, 2023, 2022 and 2021.
[4] No performance-based RSUs were granted during fiscal 2021.