v3.26.1
Employee Retirement Plans - Reconciliation of Changes in Projected Benefit Obligation and Fair Value of Plan Assets and Funded Status of Defined-benefit Plans (Detail) - USD ($)
$ in Millions
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Pension Benefit | U.S.      
Change in benefit obligation      
Benefit obligation, beginning of year $ 48.2 $ 70.0  
Service cost 0.0 0.0 $ 0.0
Interest cost 2.5 2.8 3.5
Plan amendments 0.0 0.0  
Actuarial (gain)/loss (0.1) (1.3)  
Benefits paid [1] (3.5) (3.3)  
Administrative expenses paid 0.0 0.0  
Foreign currency translation adjustment 0.0 0.0  
Settlements 0.0 (20.0)  
Curtailments 0.0 0.0  
Participant contributions 0.0 0.0  
Benefit obligations acquired 0.0 0.0  
Benefits obligation, end of year 47.1 48.2 70.0
Change in plan assets      
Fair value, beginning of year 38.8 53.4  
Actual return on plan assets 2.2 3.5  
Company contributions 0.5 5.2  
Benefits paid [1] (3.5) (3.3)  
Administrative expenses paid 0.0 0.0  
Foreign currency translation adjustment 0.0 0.0  
Settlements 0.0 (20.0)  
Participant contributions 0.0 0.0  
Plan assets acquired 0.0 0.0  
Fair value, end of year 38.0 38.8 53.4
Funded status (9.1) (9.4)  
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (7.4) (8.1)  
Amounts recognized in AOCI consist of:      
Net (gain)/loss (7.4) (8.1)  
Net prior service credit 0.0 0.0  
Total (7.4) (8.1)  
Pension Benefit | Non-U.S      
Change in benefit obligation      
Benefit obligation, beginning of year 1.2 1.1  
Service cost 1.4 0.0 0.0
Interest cost 0.6 0.1 0.1
Plan amendments 0.0 0.0  
Actuarial (gain)/loss (3.0) (0.0)  
Benefits paid [1] 0.7 0.0  
Administrative expenses paid (0.1) 0.0  
Foreign currency translation adjustment 2.2 0.0  
Settlements (5.1) 0.0  
Curtailments (3.3) 0.0  
Participant contributions 1.2 0.0  
Benefit obligations acquired 52.0 0.0  
Benefits obligation, end of year 47.8 1.2 1.1
Change in plan assets      
Fair value, beginning of year 0.1 0.1  
Actual return on plan assets 1.3 0.0  
Company contributions 1.2 0.0  
Benefits paid [1] 0.7 0.0  
Administrative expenses paid (0.1) 0.0  
Foreign currency translation adjustment 1.8 0.0  
Settlements (5.1) 0.0  
Participant contributions 1.2 0.0  
Plan assets acquired 37.7 0.0  
Fair value, end of year 38.8 0.1 0.1
Funded status (9.0) (1.1)  
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (2.4) (0.0)  
Amounts recognized in AOCI consist of:      
Net (gain)/loss (2.4) 0.0  
Net prior service credit 0.0 0.0  
Total (2.4) (0.0)  
Other Benefits      
Change in benefit obligation      
Benefit obligation, beginning of year 3.0 3.1  
Service cost 0.0 0.0 0.0
Interest cost 0.2 0.2 0.2
Plan amendments (0.0) 0.0  
Actuarial (gain)/loss (0.0) (0.1)  
Benefits paid [1] (0.2) (0.2)  
Administrative expenses paid 0.0 0.0  
Foreign currency translation adjustment 0.0 0.0  
Settlements 0.0 0.0  
Curtailments 0.0 0.0  
Participant contributions 0.0 0.0  
Benefit obligations acquired 0.0 0.0  
Benefits obligation, end of year 3.0 3.0 3.1
Change in plan assets      
Fair value, beginning of year 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Company contributions 0.2 0.2  
Benefits paid [1] (0.2) (0.2)  
Administrative expenses paid 0.0 0.0  
Foreign currency translation adjustment 0.0 0.0  
Settlements 0.0 0.0  
Participant contributions 0.0 0.0  
Plan assets acquired 0.0 0.0  
Fair value, end of year 0.0 0.0 $ 0.0
Funded status (3.0) (3.0)  
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (1.3) (1.5)  
Amounts recognized in AOCI consist of:      
Net (gain)/loss (1.0) (1.2)  
Net prior service credit (0.3) (0.3)  
Total (1.3) (1.5)  
Accrued Compensation, Contributions to Employee Benefit Plans and Related Taxes | Pension Benefit | U.S.      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets 0.0 0.0  
Amounts recognized in AOCI consist of:      
Total 0.0 0.0  
Accrued Compensation, Contributions to Employee Benefit Plans and Related Taxes | Pension Benefit | Non-U.S      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets 0.0 0.0  
Amounts recognized in AOCI consist of:      
Total 0.0 0.0  
Accrued Compensation, Contributions to Employee Benefit Plans and Related Taxes | Other Benefits      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (0.3) (0.3)  
Amounts recognized in AOCI consist of:      
Total (0.3) (0.3)  
Other Liabilities | Pension Benefit | U.S.      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (9.1) (9.4)  
Amounts recognized in AOCI consist of:      
Total (9.1) (9.4)  
Other Liabilities | Pension Benefit | Non-U.S      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (9.0) (1.1)  
Amounts recognized in AOCI consist of:      
Total (9.0) (1.1)  
Other Liabilities | Other Benefits      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (2.7) (2.7)  
Amounts recognized in AOCI consist of:      
Total (2.7) (2.7)  
AOCI | Pension Benefit | U.S.      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (7.4) (8.1)  
Amounts recognized in AOCI consist of:      
Total (7.4) (8.1)  
AOCI | Pension Benefit | Non-U.S      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (4.7) (0.0)  
Amounts recognized in AOCI consist of:      
Total (4.7) (0.0)  
AOCI | Other Benefits      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (1.3) (1.5)  
Amounts recognized in AOCI consist of:      
Total (1.3) (1.5)  
Less: Amount Attributable to Redeemable NCI | Pension Benefit | U.S.      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets 0.0 0.0  
Amounts recognized in AOCI consist of:      
Total 0.0 0.0  
Less: Amount Attributable to Redeemable NCI | Pension Benefit | Non-U.S      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (2.3) 0.0  
Amounts recognized in AOCI consist of:      
Total (2.3) 0.0  
Less: Amount Attributable to Redeemable NCI | Other Benefits      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets 0.0 0.0  
Amounts recognized in AOCI consist of:      
Total 0.0 0.0  
AOCI Attributable to Controlling Interest | Pension Benefit | U.S.      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (7.4) (8.1)  
Amounts recognized in AOCI consist of:      
Total (7.4) (8.1)  
AOCI Attributable to Controlling Interest | Pension Benefit | Non-U.S      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (2.4) (0.0)  
Amounts recognized in AOCI consist of:      
Total (2.4) (0.0)  
AOCI Attributable to Controlling Interest | Other Benefits      
Amounts recognized in our consolidated and combined balance sheets consist of:      
Amounts recognized in the consolidated balance sheets (1.3) (1.5)  
Amounts recognized in AOCI consist of:      
Total $ (1.3) $ (1.5)  
[1] The fiscal 2026 non-U.S. benefits paid amount reflects both benefit payments and insurance-related transactions. During the year, insurance reserves were transferred to the plan in an amount that exceeded annuity benefit payments and insurance premiums, resulting in a net increase in the line item.