v3.26.1
Pensions and Other Postretirement Benefits (Details 3) - USD ($)
$ in Millions
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Change in plan assets:      
Company contributions $ 11.5 $ 5.0 $ 4.1
Defined benefit pensions (50.6) (53.0)  
Other postretirement benefits (44.3) (45.8)  
Defined Benefit Pension Plans      
Change in benefit obligation:      
Benefit obligation at beginning of year 332.6 345.9  
Service cost 0.7 0.7 0.9
Interest cost 14.9 17.7 18.5
Amendments 0.0 0.2  
Actuarial loss (gain) (A) [1] (8.4) 6.7  
Benefits paid (26.6) (38.6)  
Curtailment 0.0 0.0  
Settlement (115.6) 0.0  
Foreign currency translation adjustments 0.0 0.0  
Benefit obligation at end of year 197.6 332.6 345.9
Change in plan assets:      
Fair value of plan assets at beginning of year 269.6 283.0  
Actual return on plan assets 16.1 20.2  
Company contributions 11.5 5.0  
Benefits paid (26.6) (38.6)  
Settlement (115.6) 0.0  
Foreign currency translation adjustments 0.0 0.0  
Fair value of plan assets at end of year 155.0 269.6 283.0
Funded status of the plans (42.6) (63.0)  
Defined benefit pensions (50.6) (53.0)  
Other noncurrent assets 11.9 9.1  
Accrued compensation (3.9) (19.1)  
Other postretirement benefits 0.0 0.0  
Net benefit liability (42.6) (63.0)  
Other Postretirement Benefits      
Change in benefit obligation:      
Benefit obligation at beginning of year 50.6 48.9  
Service cost 0.7 0.6 0.8
Interest cost 2.4 2.7 2.6
Amendments 0.0 0.0  
Actuarial loss (gain) (A) [1] (0.9) 2.3  
Benefits paid (3.6) (3.8)  
Curtailment 0.0 0.0  
Settlement 0.0 0.0  
Foreign currency translation adjustments 0.0 (0.1)  
Benefit obligation at end of year 49.2 50.6 48.9
Change in plan assets:      
Fair value of plan assets at beginning of year 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Company contributions 3.6 3.8  
Benefits paid (3.6) (3.8)  
Settlement 0.0 0.0  
Foreign currency translation adjustments 0.0 0.0  
Fair value of plan assets at end of year 0.0 0.0 $ 0.0
Funded status of the plans (49.2) (50.6)  
Defined benefit pensions 0.0 0.0  
Other noncurrent assets 0.0 0.0  
Accrued compensation (4.9) (4.8)  
Other postretirement benefits (44.3) (45.8)  
Net benefit liability $ (49.2) $ (50.6)  
[1] The actuarial losses and gains for our defined benefit pension plans and other postretirement benefits were primarily due to changes in the discount rates used in determining the plan obligations.