v3.26.1
Pension - Projected benefit obligation and projected fair value (Details) - item
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Pension    
Number of pension commitments 3  
Pension Plan    
Pension    
Discount rate 3.70% 3.60%
In-payment benefits 2.50% 2.50%
Expected return on plan assets 2.90% 2.90%