Employee Retirement Plans - Weighted-Average Assumptions Used used to Determine Unfunded Benefit Obligation and Net Periodic Benefit Cost (Detail)	12 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2023
Benefit obligation:
Discount rate	5.36%	5.52%	4.80%
Net periodic pension cost:
Discount rate	5.48%	4.76%	4.32%
Expected long-term rate of return	6.50%	6.50%	6.50%