Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024	May 31, 2025
Income Taxes [Line Items]
Effective income tax (benefit) expense rate	23.50%	13.90%	23.50%	18.20%
Corporate income tax rate	21.00%	21.00%	21.00%	21.00%
Deferred income tax liability	$ 0		$ 0		$ 0
Unremitted foreign earnings	$ 168,100,000		$ 168,100,000		$ 164,700,000
Minimum tax rate on reported profits from OECD framework			15.00%
U.S. Foreign Tax Credits
Income Taxes [Line Items]
Deferred tax assets adjusted net amount		$ 21,800,000		$ 21,800,000
Net Change in Deferred Tax Assets		$ 21,800,000		$ 21,800,000