v3.26.1
Employee Retirement Plans - Other Changes in Plan Assets And Benefit Obligations Recognized in OCI (Detail) - USD ($)
$ in Millions
 12 Months Ended
May 31, 2026
May 31, 2025
Pension Benefit | U.S.    
Defined Benefit Plan Disclosure [Line Items]    
Net (gain)/loss $ 0.4 $ (1.7)
Amortization of net gain/(loss) 0.3 0.3
Settlement gain 0.0 2.7
Total recognized in other comprehensive loss/(income) 0.7 1.3
Total recognized in net periodic benefit cost (income) and OCI 0.2 (1.9)
Pension Benefit | Non-U.S    
Defined Benefit Plan Disclosure [Line Items]    
Net (gain)/loss (5.0) (0.0)
Amortization of net gain/(loss) 0.0 0.0
Settlement gain 0.3 0.0
Total recognized in other comprehensive loss/(income) (4.7) (0.0)
Total recognized in net periodic benefit cost (income) and OCI (5.7) (0.0)
Other Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Net (gain)/loss (0.0) (0.1)
Amortization of net gain/(loss) 0.2 0.2
Settlement gain 0.0 0.0
Total recognized in other comprehensive loss/(income) 0.2 0.1
Total recognized in net periodic benefit cost (income) and OCI $ 0.2 $ 0.1