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Other Income (Expense), Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Other Income (Expense), Net |  |  |  |
External services | $ 4 | $ 3 | $ 8 | $ 6
Interest income | 10 | 9 | 20 | 16
Gains (losses) on investments | 5 | 4 | 14 | 10
Other income (expense), net | 18 | 21 | 41 | 37
Miscellaneous | $ (1) | $ (5) | $ (1) | $ (5)

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