Annual report pursuant to Section 13 and 15(d)

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

v3.24.2
Stock-Based Compensation Plans (Other Information Pertaining to Restricted Stock Awards) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
May 31, 2024
May 31, 2023
May 31, 2022
Time-Based Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share $ 0 $ 0 $ 114.21
Total grant-date fair value of shares vested $ 3.1 $ 4.3 $ 3.8
Performance-Based Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share $ 0 $ 0 $ 103.97
Total grant-date fair value of shares vested $ 0.0 $ 3.7 $ 7.2