v3.26.1
Employee Retirement Plans - Summary of Defined Benefit Plan's Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value $ 76.8 $ 38.9
U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 38.0 38.8
Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 38.8 0.1
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 71.5 36.1
Level 1 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 37.0 36.0
Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 34.5 0.1
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 4.3 0.0
Level 2 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 4.3 0.0
Real Estate Funds | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 9.3 0.0
Real Estate Funds | Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 9.3 0.0
Real Estate Funds | Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Cash and Cash Equivalents | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 3.9 2.7
Cash and Cash Equivalents | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.5 0.1
Cash and Cash Equivalents | Level 1 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 3.9 2.7
Cash and Cash Equivalents | Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.5 0.1
Cash and Cash Equivalents | Level 2 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Cash and Cash Equivalents | Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Fixed-Income Funds | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 33.1 26.9
Fixed-Income Funds | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 11.2 0.0
Fixed-Income Funds | Level 1 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 33.1 26.9
Fixed-Income Funds | Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 11.2 0.0
Fixed-Income Funds | Level 2 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Fixed-Income Funds | Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Equity Funds | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 6.4
Equity Funds | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 13.5 0.0
Equity Funds | Level 1 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 6.4
Equity Funds | Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 13.5 0.0
Equity Funds | Level 2 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Equity Funds | Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Hedge Funds | Commingled Fund Investments Measured at Net Asset Value | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value [1] 1.0 2.8
Hedge Funds | Level 1 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value [1] 0.0 0.0
Hedge Funds | Level 2 | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value [1] 0.0 0.0
Other securities | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 4.3 0.0
Other securities | Level 1 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value 0.0 0.0
Other securities | Level 2 | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit plan assets fair value $ 4.3 $ 0.0
[1] Investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been categorized in the fair value hierarchy.