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Leases (Tables) | 12 Months Ended
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Sep. 30, 2025
Leases [Abstract] |
Components of Company's Lease Costs | The components of the Company’s lease costs were as follows:
|  | Years Ended September 30 |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (In millions) |
Operating lease cost |  | $ | 25 |  |  | $ | 25 |  |  | $ | 26 |
Finance lease cost |  |  | 8 |  |  |  | 5 |  |  |  | 6 |
Total lease cost |  | $ | 33 |  |  | $ | 30 |  |  | $ | 32 |
Supplemental Cash Flow Information Related to Company's Leases | Supplemental cash flow information related to the Company’s leases was as follows:
|  | Years Ended September 30 |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (In millions) |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |  |  |
Operating cash flows from operating leases |  | $ | 17 |  |  | $ | 18 |  |  | $ | 18 |
Operating cash flows from finance leases |  |  | 2 |  |  |  | 1 |  |  |  | 2 |
Financing cash flows from finance leases |  |  | 6 |  |  |  | 4 |  |  |  | 3 |
Right-of-use assets obtained in exchange for new operating lease liabilities |  | $ | 8 |  |  | $ | 9 |  |  | $ | 11 |
Right-of-use assets obtained in exchange for new finance lease liabilities |  | $ | 11 |  |  | $ | 2 |  |  | $ | 4 |
Supplemental Balance Sheet Information Related to Company's Leases | Supplemental balance sheet information related to the Company’s leases was as follows:
Description |  | Balance Sheet Classification |  | September 30, 2025 |  |  | September 30, 2024 |
|  |  |  | (In millions) |
Lease ROU assets: |  |  |  |  |  |  |  |
Operating |  | Other assets |  | $ | 101 |  |  | $ | 104 |
Finance |  | Net property, plant and equipment |  |  | 26 |  |  |  | 37 |
Total lease ROU assets |  |  |  | $ | 127 |  |  | $ | 141 |
Lease liabilities: |  |  |  |  |  |  |  |
Current: |  |  |  |  |  |  |  |
Operating |  | Accounts payable and accrued liabilities |  | $ | 13 |  |  | $ | 14 |
Finance |  | Current portion of long-term debt |  |  | 6 |  |  |  | 4 |
Long-term: |  |  |  |  |  |  |  |
Operating |  | Other liabilities |  |  | 85 |  |  |  | 88 |
Finance |  | Long-term debt |  |  | 24 |  |  |  | 23 |
Total lease liabilities |  |  |  | $ | 128 |  |  | $ | 129 |
Weighed Average Remaining Lease Term and Discount Rates | The following table presents the weighted-average remaining lease term and discount rates for the Company’s leases:
Description |  | September 30, 2025 |  |  | September 30, 2024 |
Weighted-average remaining lease term (years): |  |  |  |  |  |
Operating leases |  |  | 21 |  |  |  | 21 |
Finance leases |  |  | 7 |  |  |  | 9 |
Weighted-average discount rate: |  |  |  |  |  |
Operating leases |  |  | 3.22 | % |  |  | 3.11 | %
Finance leases |  |  | 4.69 | % |  |  | 5.09 | %
Future Minimum Lease Payments Under Non-cancelable Operating and Finance Leases | Future minimum lease payments under non-cancelable operating and finance leases as of September 30, 2025 were as follows:
Years Ending September 30 |  | Operating leases |  |  | Finance leases |
|  | (In millions) |
2026 |  | $ | 17 |  |  | $ | 7 |
2027 |  |  | 14 |  |  |  | 5 |
2028 |  |  | 11 |  |  |  | 5 |
2029 |  |  | 10 |  |  |  | 3 |
2030 |  |  | 10 |  |  |  | 3 |
2031 and thereafter |  |  | 65 |  |  |  | 11 |
Total lease payments |  |  | 127 |  |  |  | 34 |
Less: imputed interest |  |  | 29 |  |  |  | 4 |
Total |  | $ | 98 |  |  | $ | 30 |

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