Pension and Other Postretirement Benefits - Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates (Details) - Other Benefits |
Sep. 30, 2024 |
Sep. 30, 2023 |
|---|---|---|
| Defined Benefit Plan Disclosure | ||
| Defined Benefit Plan, Ultimate Health Care Cost Trend Rate | 5.00% | 5.00% |
| Participants Over and Under 65 | ||
| Defined Benefit Plan Disclosure | ||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year | 6.30% | 6.50% |
| CANADA | Participants Over and Under 65 | ||
| Defined Benefit Plan Disclosure | ||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year | 4.50% | 4.50% |