Employee Retirement Plans - Plan Assets for Defined Benefit Plans (Detail)	May 31, 2024	May 31, 2023
Asset category
Weighted-average asset allocation	100.00%	100.00%
Equity Securities
Asset category
Weighted-average asset allocation	30.00%	37.00%
Fixed-Income Funds
Asset category
Weighted-average asset allocation	46.00%	40.00%
Hedge Funds
Asset category
Weighted-average asset allocation	16.00%	16.00%
Other securities
Asset category
Weighted-average asset allocation	8.00%	7.00%