Pension and Other Postretirement Benefits Target asset allocation (Details) |
Apr. 30, 2025 |
|---|---|
| Public Equity Investments [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 26.00% |
| Fixed Income Investments [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 59.00% |
| Alternative Investments [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 15.00% |