Postretirement Benefits - Pretax Net Actuarial Gain Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings, Postretirement (Detail) - Postretirement Benefits - USD ($) $ in Thousands	May 31, 2024	May 31, 2023
Domestic
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial gain	$ 170	$ 99
Non-U.S. Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial gain	$ 11,785	$ 3,838