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Other Income (Expense), Net Other Income (Expense), Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Other Income (Expense), Net |  |  |
Interest income | $ 52 | $ 42 | $ 34
External services | 28 | 17 | 15
Gain (Loss) on Investments | 14 | 23 | 13
Miscellaneous | (2) | (11) | (1)
Other income (expense), net | $ 92 | $ 71 | $ 61

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