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Other Financial Data - Accrued Expenses (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Accrued Expenses [Line Items] |  |
Customer advances (contract liabilities) | $ 897 | $ 776
Operating lease liabilities (current) | $ 144 | $ 128
Current lease liabilities (accrued expenses)[Extensible Enumeration] | Accrued expenses | Accrued expenses
Other Current Liabilities |  |
Accrued Expenses [Line Items] |  |
Customer advances (contract liabilities) | $ 861 | $ 751
Employee compensation | 618 | 523
Product warranty | $ 84 | $ 84

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