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v3.25.1

Retirement Benefits | 6 Months Ended
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Mar. 31, 2025
Retirement Benefits [Abstract] |
Retirement Benefits | Retirement Benefits The components of net periodic pension and postretirement benefit cost were (in millions):
| Pension Benefits
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 11 |  |  | $ | 9 |  |  | $ | 21 |  |  | $ | 19 |
Interest cost | 34 |  |  | 37 |  |  | 68 |  |  | 73 |
Expected return on plan assets | (42) |  |  | (43) |  |  | (83) |  |  | (85) |
Amortization of net actuarial loss | 7 |  |  | — |  |  | 13 |  |  | — |
Net periodic pension benefit cost | $ | 10 |  |  | $ | 3 |  |  | $ | 19 |  |  | $ | 7 |
| Other Postretirement Benefits
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | — |  |  | — |  |  | — |  |  | 1 |
Amortization of net actuarial loss | 1 |  |  | 1 |  |  | 2 |  |  | 1 |
Net periodic postretirement benefit cost | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 2 |
The service cost component is included in Cost of sales and Selling, general and administrative expenses in the Consolidated Statement of Operations. All other components are included in Other income in the Consolidated Statement of Operations.

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