Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Capitalized Contract Cost [Line Items]
Total	$ 576	$ 556
Other current assets
Capitalized Contract Cost [Line Items]
Total	327	265
Other noncurrent assets
Capitalized Contract Cost [Line Items]
Total	$ 249	$ 291

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration