Employee Pension Plans - Weighted-Average Assumptions Used used to Determine Unfunded Benefit Obligation and Net Periodic Benefit Cost (Detail)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Benefit obligation:
Discount rate	4.78%	4.27%	2.90%
Net periodic pension cost:
Discount rate	4.25%	2.74%	2.65%
Expected long-term rate of return	6.25%	6.75%	7.00%