v3.25.2
Income Taxes - Activity Related to Unrecognized Tax Benefits (Detail) - USD ($)
$ in Millions
12 Months Ended
May 31, 2025
May 31, 2024
May 31, 2023
Income Tax Disclosure [Abstract]      
Unrecognized tax benefits, beginning balance $ 4.4 $ 2.9 $ 5.7
Additions for tax positions of prior years 0.2 3.4 0.1
Reductions for tax positions of prior years (2.9) (1.4) (2.8)
Settlements   (0.5)  
Foreign currency translation (0.1)   (0.1)
Unrecognized tax benefits, ending balance $ 1.6 $ 4.4 $ 2.9