Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Cash paid for amounts included in the measurement of lease liabilities | |||
| Operating cash flows from operating leases | $ 114 | $ 117 | $ 110 |
| Financing cash flows from finance leases | 64 | 6 | 10 |
| Right-of-use assets obtained in exchange for lease obligations | |||
| Operating leases | 53 | 68 | 163 |
| Financing leases | $ 62 | $ 0 | $ 9 |
| X | ||||||||||
- Definition Cash Flow, Lessee No definition available.
|
| X | ||||||||||
- Definition Finance Lease, Principal Payments Including Capital Expenditures No definition available.
|
| X | ||||||||||
- Definition Right-Of-Use Asset Obtained In Exchange For Lease Liability No definition available.
|
| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|