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Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Income (Expense), Net
External services	$ 5	$ 3	$ 11	$ 11
Interest income	9	2	25	9
Gains (losses) on investments	5	(11)	15	(13)
Miscellaneous	1	0	6	4
Other income (expense), net	$ 20	$ (6)	$ 57	$ 11

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Component of Other Income (Expense) [Line Items]

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- Definition

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

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(d))
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Amount of income (expense) related to nonoperating activities, classified as other.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
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-Section S99
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