Employee Benefit Plans - Asset Allocations in the Pension Plan (Details)	May 31, 2023	May 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	100.00%
Actual Asset Allocation	100.00%	100.00%
Large cap equity
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	26.00%
Actual Asset Allocation	27.30%	29.10%
Small cap equity
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	5.00%
Actual Asset Allocation	5.20%	6.20%
International equity
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	8.00%
Actual Asset Allocation	8.80%	8.20%
Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	45.00%
Actual Asset Allocation	44.80%	43.20%
Absolute return strategy funds
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	16.00%
Actual Asset Allocation	13.60%	12.70%
Cash
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	0.00%
Actual Asset Allocation	0.30%	0.60%