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Other Income (Expense), Net (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Other Income (Expense), Net |  |  |  |
External services | $ 3 | $ 3 | $ 11 | $ 10
Interest income | 2 | 3 | 9 | 9
Gains (losses) on investments | (11) | 5 | (13) | 16
Miscellaneous | 0 | 0 | 4 | 2
Other income (expense), net | $ (6) | $ 11 | $ 11 | $ 37

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