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Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Other Income (Expense), Net
External services	$ 5	$ 4
Interest income	3	3
Gains (losses) on investments	4	9
Miscellaneous	(2)	(1)
Other income (expense), net	$ 14	$ 15

X

- Definition

Component of Other Income (Expense) [Line Items]

+ References

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- Definition

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

+ References

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X

- Definition

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

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- Definition

The net amount of nonoperating interest income (expense).

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- Definition

Amount of income related to nonoperating activities, classified as other.

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Amount of income (expense) related to nonoperating activities, classified as other.

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