v3.26.1
Pension Plans - Pension Plan Assets Categorized Using Fair Value Hierarchy (Detail) - Pension Benefits - USD ($)
$ in Thousands
May 31, 2026
May 31, 2025
May 31, 2024
U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets $ 890,296 $ 770,703 $ 720,079
U.S. Plans | U.S. Treasury and other government      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 95,683 57,763  
U.S. Plans | State and Municipal Debt Obligations      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets   213  
U.S. Plans | Foreign Covered Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 5,444 3,365  
U.S. Plans | Mortgage-backed securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 17,481 17,964  
U.S. Plans | Corporate bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 13,211 15,750  
U.S. Plans | Large Cap Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets   51,743  
U.S. Plans | Equity Mutual Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 410,005 377,516  
U.S. Plans | Mutal Funds - Multi-class      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 145,220 155,782  
U.S. Plans | Debt Mutual Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 3,166 2,900  
U.S. Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 28,241 19,327  
U.S. Plans | Futures contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 48 64  
U.S. Plans | Investments Measured at NAV      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 171,797 [1] 68,316 [2]  
Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 198,764 188,984 174,260
Non-U.S. Plans | Foreign Covered Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 1,370 1,050  
Non-U.S. Plans | Cash and Cash Equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 715 476  
Non-U.S. Plans | Pooled Equity Securities Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 71,182 66,101  
Non-U.S. Plans | Pooled Funds Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 86,194 82,844  
Non-U.S. Plans | Insurance Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 29,036 28,121  
Non-U.S. Plans | Mutual funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 10,267 10,392  
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 90,490 71,070  
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   51,743  
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Plans | Equity Mutual Funds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 62,249    
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 28,241 19,327  
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 715 476  
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 715 476  
Significant Other Observable Inputs (Level 2) | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 627,961 631,253  
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 95,683 57,763  
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   213  
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 5,444 3,365  
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 17,481 17,964  
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 13,211 15,750  
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 347,756 377,516  
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 145,220 155,782  
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 3,166 2,900  
Significant Other Observable Inputs (Level 2) | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 169,013 160,387  
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 1,370 1,050  
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 71,182 66,101  
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 86,194 82,844  
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 10,267 10,392  
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 29,084 28,185 $ 20,477
Significant Unobservable Inputs (Level 3) | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 48 64  
Significant Unobservable Inputs (Level 3) | U.S. Plans | Futures contracts      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 48 64  
Significant Unobservable Inputs (Level 3) | Non-U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Pension plans with Plan Assets 29,036 28,121  
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 $ 29,036 $ 28,121  
[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.
[2] 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.