v3.26.1
Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Accumulated Other Comprehensive Loss      
Balance, beginning $ 1,211.6 $ 1,189.8 $ 1,099.1
Total other comprehensive income (loss) 1.7 3.2 14.7
Balance, ending 1,703.8 1,211.6 1,189.8
Currency Translation Adjustments      
Accumulated Other Comprehensive Loss      
Balance, beginning (2.4) (5.5) (5.7)
Other comprehensive income (loss) before reclassifications 0.3 3.1 0.2
Total other comprehensive income (loss) 0.3 3.1 0.2
Balance, ending (2.1) (2.4) (5.5)
Pension Plans      
Accumulated Other Comprehensive Loss      
Balance, beginning (3.2) (3.3) (17.8)
Other comprehensive income (loss) before reclassifications 1.4 0.3 (0.3)
Amounts reclassified from AOCL   0.2 (14.8)
Total other comprehensive income (loss) 1.4 0.1 14.5
Balance, ending (1.8) (3.2) (3.3)
Total      
Accumulated Other Comprehensive Loss      
Balance, beginning (5.6) (8.8) (23.5)
Other comprehensive income (loss) before reclassifications 1.7 3.4 (0.1)
Amounts reclassified from AOCL   0.2 (14.8)
Total other comprehensive income (loss) 1.7 3.2 14.7
Balance, ending $ (3.9) $ (5.6) $ (8.8)