Income Taxes - Reconciliation of Federal Statutory Corporate Income Tax Rate to Total Tax Provision (Detail)	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
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	3.50%	0.60%	2.70%
Non-U.S. income taxes at other than federal statutory rate	0.50%	0.70%	(0.30%)
Excess benefit related to share-based payment awards	(2.70%)	(0.10%)	(0.10%)
Non-deductible executive compensation	4.90%	2.10%	2.10%
Research and development tax credit	(0.20%)	(0.80%)
Non-deductible spin-off transaction costs	7.50%
Non-deductible note receivable impairment	3.20%
Tax impact of SES impairment and deconsolidation	11.10%
Deferred state tax adjustment due to spin-off	4.20%
Other	(0.40%)	(2.00%)	(0.40%)
Effective tax rate attributable to controlling interest	52.60%	21.50%	25.00%