Weighted-Average Actual Target Allocation of Plan Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2023	May 31, 2022	May 31, 2021
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 631,486	$ 616,960	$ 672,377
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 166,120	193,375	$ 239,853
Equity securities | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	55.00%
Actual Asset Allocation	$ 340,100	326,200
Equity securities | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	40.00%
Actual Asset Allocation	$ 61,800	69,200
Fixed income securities | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Actual Asset Allocation	$ 129,200	117,000
Fixed income securities | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	48.00%
Actual Asset Allocation	$ 81,500	101,100
Multi-class | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Actual Asset Allocation	$ 125,300	136,600
Cash | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	5.00%
Actual Asset Allocation	$ 36,600	37,000
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	$ 300	200
Real Estate | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	12.00%
Actual Asset Allocation	$ 22,700	$ 23,000