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Other Income (Expense), Net Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Other Income (Expense), Net
Other income	$ 0	$ 28	$ 0
Interest income	15	12	18
External services	16	13	12
Gain (Loss) on Investments	(17)	16	9
Miscellaneous	(7)	0	(3)
Other income (expense), net	$ 7	$ 13	$ 36

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Component of Other Income (Expense) [Line Items]

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Revenue and expenses from external services included in Other income (expense), net on the Consolidated Statements of Operations.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of revenue and income classified as other.

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