Income Taxes - Reconciliation of Federal Statutory Corporate Income Tax Rate to Total Tax Provision (Detail)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Income Tax Disclosure [Abstract]
Federal statutory corporate income tax rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal tax benefit	1.70%	2.30%	0.80%
Non-U.S. income taxes at other than federal statutory rate	0.90%	(0.90%)	(0.30%)
Excess benefit related to share-based payment awards	(0.20%)	0.20%	(0.50%)
Nondeductible executive compensation	1.10%	0.90%	0.60%
Oil & Gas capital stock loss			(1.50%)
Other	(1.60%)	0.20%	(0.50%)
Effective tax rate attributable to controlling interest	22.90%	23.30%	19.60%