Pension Plan Assets Categorized Using Fair Value Hierarchy (Detail) - Pension Benefits - USD ($) $ in Thousands		May 31, 2022	May 31, 2021	May 31, 2020
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		$ 616,960	$ 672,377	$ 516,550
U.S. Plans | U.S. Treasury and other government
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		34,902	20,752
U.S. Plans | State and Municipal Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		576	767
U.S. Plans | Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		1,150	1,068
U.S. Plans | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		10,254	17,628
U.S. Plans | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		23,883	42,370
U.S. Plans | Large Cap Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		30,295	40,332
U.S. Plans | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		295,905	346,790
U.S. Plans | Mutal Funds - Multi-class
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		136,583	150,838
U.S. Plans | Debt Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		16,368	29,440
U.S. Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		37,004	22,224
U.S. Plans | Limited Partner
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		166	168
U.S. Plans | Investments Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	[1]	29,874
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		193,375	239,853	194,874
Non-U.S. Plans | Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		920	717
Non-U.S. Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		109	77
Non-U.S. Plans | Pooled Equity Securities Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		68,067	101,975
Non-U.S. Plans | Pooled Funds Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		100,151	107,457
Non-U.S. Plans | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		23,013	28,230
Non-U.S. Plans | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		1,115	1,397
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		67,299	62,556
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Plans | Large Cap Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		30,295	40,332
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		37,004	22,224
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		109	77
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		109	77
Significant Other Observable Inputs (Level 2) | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		519,621	609,653
Significant Other Observable Inputs (Level 2) | U.S. Plans | U.S. Treasury and other government
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		34,902	20,752
Significant Other Observable Inputs (Level 2) | U.S. Plans | State and Municipal Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		576	767
Significant Other Observable Inputs (Level 2) | U.S. Plans | Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		1,150	1,068
Significant Other Observable Inputs (Level 2) | U.S. Plans | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		10,254	17,628
Significant Other Observable Inputs (Level 2) | U.S. Plans | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		23,883	42,370
Significant Other Observable Inputs (Level 2) | U.S. Plans | Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		295,905	346,790
Significant Other Observable Inputs (Level 2) | U.S. Plans | Mutal Funds - Multi-class
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		136,583	150,838
Significant Other Observable Inputs (Level 2) | U.S. Plans | Debt Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		16,368	29,440
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		170,253	211,546
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans | Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		920	717
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans | Pooled Equity Securities Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		68,067	101,975
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans | Pooled Funds Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		100,151	107,457
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		1,115	1,397
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		23,179	28,398	$ 27,437
Significant Unobservable Inputs (Level 3) | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		166	168
Significant Unobservable Inputs (Level 3) | U.S. Plans | Limited Partner
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		166	168
Significant Unobservable Inputs (Level 3) | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		23,013	28,230
Significant Unobservable Inputs (Level 3) | Non-U.S. Plans | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets		$ 23,013	$ 28,230

[1] In accordance with Subtopic 820-10, Fair Value Measurements and Disclosures, certain investments that are measured at fair value using the net asset value ("NAV") per share practical expedient have not been classified in the fair value hierarchy. The investments that are measured at fair value using NAV per share included in the table above are intended to permit reconciliation of the fair value hierarchy to the fair value of the plan assets at the end of each period.