Long-term and Short-term Debt - Schedule of Carrying Amounts and Estimated Fair Values (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Carrying Value | ||
| Current portion of long-term debt | $ 2 | $ 2 |
| Long-term debt | 2,569 | 2,614 |
| Carrying Value | ||
| Carrying Value | ||
| Current portion of long-term debt | 2 | 2 |
| Long-term debt | 2,569 | 2,614 |
| Fair Value | ||
| Fair Value | ||
| Current portion of long-term debt | 2 | 2 |
| Long-term debt | $ 2,138 | $ 2,350 |
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- Definition Long-term Debt, Current Maturities, Fair Value No definition available.
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- References No definition available.
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- References No definition available.
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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