Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
Aug. 31, 2026	Aug. 31, 2025	May 31, 2026
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (3.0)	$ 7.5
Minimum effective tax rate	15.00%
Unrecognized tax benefits that would impact the tax effective rate	$ 5.3		$ 5.0

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details