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Other Income (Expense), Net (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Other Income (Expense), Net |  |
External services | $ 9 | $ 4
Interest income | 10 | 10
Gains (losses) on investments | (2) | 9
Other income (expense), net | $ 17 | $ 23

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