OTHER FINANCIAL INFORMATION - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2026	Sep. 30, 2025
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 8,954	$ 9,458
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	5,518	5,801
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 3,172	$ 3,411

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.

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