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Leases (Tables) | 12 Months Ended
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Sep. 30, 2025
Leases [Abstract] |
Lease, Cost | The components of lease expense were (in millions):
|  | 2025 |  | 2024 |  | 2023
Operating lease expense (1) |  | $ | 115 |  |  | $ | 110 |  |  | $ | 100 |
Variable lease expense (2) |  | 21 |  |  | 20 |  |  | 19 |
Finance lease expense |  |  |  |  |  |
Amortization of right-of-use assets |  | 6 |  |  | 8 |  |  | 5 |
Interest on lease liabilities |  | — |  |  | — |  |  | 1 |
Total lease expense |  | $ | 142 |  |  | $ | 138 |  |  | $ | 125 |
(1) Operating lease expense includes short-term lease expense, which was not material. (2) Variable lease expense includes sublease income, which was not material. Supplemental cash flow information related to leases consists of (in millions):
| 2025 |  | 2024 |  | 2023
Cash paid for amounts included in the measurement of lease liabilities |  |  |  |  |
Operating cash flows from operating leases | $ | 117 |  |  | $ | 110 |  |  | $ | 102 |
Financing cash flows from finance leases | 6 |  |  | 10 |  |  | 6 |
Right-of-use assets obtained in exchange for lease obligations |  |  |  |  |
Operating leases | $ | 68 |  |  | $ | 163 |  |  | $ | 93 |
Financing leases | — |  |  | 9 |  |  | — |
Supplemental Balance Sheet Information | Supplemental balance sheet information related to leases consists of:
| 2025 |  | 2024
Weighted average remaining lease term |  |  |
Operating leases | 6.0 years |  | 6.4 years
Finance leases | 3.5 years |  | 3.7 years
Weighted average discount rate |  |  |
Operating leases | 3.81 | % |  | 3.72 | %
Finance leases | 3.73 | % |  | 2.77 | %
Operating Lease Maturity | Undiscounted maturities of lease liabilities as of September 30, 2025, were (in millions):
|  | Finance Leases |  | Operating Leases
2026 |  | $ | 2 |  |  | $ | 110 |
2027 |  | 2 |  |  | 94 |
2028 |  | 2 |  |  | 74 |
2029 |  | — |  |  | 53 |
2030 |  | — |  |  | 40 |
Thereafter |  | — |  |  | 102 |
Total undiscounted lease payments |  | $ | 6 |  |  | $ | 473 |
Less: Imputed interest |  | — |  |  | (50) |
Total lease liabilities |  | $ | 6 |  |  | $ | 423 |

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- Definition Assets And Liabilities, Lessee [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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