Weighted-Average Actual Target Allocation of Plan Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2022	May 31, 2021	May 31, 2020
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 616,960	$ 672,377	$ 516,550
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 193,375	239,853	$ 194,874
Equity securities | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	55.00%
Actual Asset Allocation	$ 326,200	387,100
Equity securities | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	37.00%
Actual Asset Allocation	$ 69,200	103,400
Fixed income securities | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Actual Asset Allocation	$ 117,000	112,000
Fixed income securities | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	52.00%
Actual Asset Allocation	$ 101,100	108,200
Multi-class | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Actual Asset Allocation	$ 136,600	150,800
Cash | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	5.00%
Actual Asset Allocation	$ 37,000	22,300
Cash | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation	100	100
Real Estate | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation	$ 200	200
Real Estate | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	11.00%
Actual Asset Allocation	$ 23,000	$ 28,200