Relationship between Plans Benefit Obligations and Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2023	May 31, 2022
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Plans with projected benefit obligations in excess of plan assets, benefit obligation	$ 696,280	$ 702,511
Plans with accumulated benefit obligations in excess of plan assets, benefit obligation	44	10,542
Plans with assets in excess of projected benefit obligations	893	1,224
Plans with assets in excess of accumulated benefit obligations	598,050	599,891
Plans with projected benefit obligations in excess of plan assets, plan asset	630,315	615,659
Plans with accumulated benefit obligations in excess of plan assets, plan asset		10,024
Plans with assets in excess of projected benefit obligations, plan asset	1,171	1,301
Plans with assets in excess of accumulated benefit obligations, plan asset	631,486	606,936
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Plans with projected benefit obligations in excess of plan assets, benefit obligation	26,918	36,607
Plans with accumulated benefit obligations in excess of plan assets, benefit obligation	24,837	32,808
Plans with assets in excess of projected benefit obligations	131,894	145,927
Plans with assets in excess of accumulated benefit obligations	123,798	139,333
Plans with projected benefit obligations in excess of plan assets, plan asset	18,585	25,049
Plans with accumulated benefit obligations in excess of plan assets, plan asset	17,839	22,844
Plans with assets in excess of projected benefit obligations, plan asset	147,535	168,326
Plans with assets in excess of accumulated benefit obligations, plan asset	$ 148,281	$ 170,531