Debt - Summary of Long-term Debt and Short-term Borrowings Outstanding (Detail) - USD ($) $ in Millions	May 31, 2025	May 31, 2024
Long-term debt:
Long-term debt	$ 2.3
Long-term Debt, Excluding Current Maturities, Total	2.3	$ 0.0
Short-term debt:
Total short-term borrowings and current maturities	149.2	148.0
Total	151.5	148.0
Canadian Government Regional Economic Growth Loan
Long-term debt:
Long-term debt	2.3	0.0
Long-term Debt, Excluding Current Maturities, Total	2.3
Revolving Credit Facility
Short-term debt:
Total short-term borrowings and current maturities	$ 149.2	$ 148.0