v3.25.2
Pension and Other Postretirement Benefits - Schedule of Assumptions Used (Details)
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Pension benefits      
Weighted-average assumptions used to determine benefit obligations      
Discount rate 5.50% 5.50% 5.30%
Weighted-average assumptions used to determine net periodic benefit costs      
Expected return on plan assets 5.60% 5.30% 5.00%
Pension benefits | Service Cost      
Weighted-average assumptions used to determine net periodic benefit costs      
Discount rate 5.50% 5.30% 4.80%
Pension benefits | Interest Cost      
Weighted-average assumptions used to determine net periodic benefit costs      
Discount rate 5.30% 5.40% 4.50%
Postretirement benefits      
Weighted-average assumptions used to determine benefit obligations      
Discount rate 5.30% 5.40% 5.30%
Postretirement benefits | Service Cost      
Weighted-average assumptions used to determine net periodic benefit costs      
Discount rate 5.50% 5.30% 4.80%
Postretirement benefits | Interest Cost      
Weighted-average assumptions used to determine net periodic benefit costs      
Discount rate 5.30% 5.40% 4.50%