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Summary of Significant Accounting Policies Cash, Cash Equivalents, and Restricted Cash (Tables) | 6 Months Ended
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Mar. 31, 2024
Cash and Cash Equivalents [Abstract] |
Schedule of Cash and Cash Equivalents |
Cash, Cash Equivalents, and Restricted Cash (in millions)
| At March 31, 2024 |  | At September 30, 2023
Cash and cash equivalents | $ | 508 |  |  | $ | 501 |
Restricted cash and cash equivalents included in Other long-term assets | 20 |  |  | 20 |
Total cash, cash equivalents, and restricted cash | $ | 528 |  |  | $ | 521 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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