OTHER FINANCIAL INFORMATION - Schedule of Goodwill by Business Segment (Details) - USD ($) $ in Millions	Mar. 31, 2026	Sep. 30, 2025
Goodwill [Line Items]
Goodwill	$ 18,153	$ 18,193
Software & Systems
Goodwill [Line Items]
Goodwill	12,558	12,563
Software & Systems \| Control Systems & Software
Goodwill [Line Items]
Goodwill	9,096	9,095
Software & Systems \| Test & Measurement
Goodwill [Line Items]
Goodwill	3,462	3,468
Intelligent Devices
Goodwill [Line Items]
Goodwill	4,974	5,004
Intelligent Devices \| Sensors
Goodwill [Line Items]
Goodwill	1,595	1,604
Intelligent Devices \| Final Control
Goodwill [Line Items]
Goodwill	3,379	3,400
Safety & Productivity
Goodwill [Line Items]
Goodwill	$ 621	$ 626

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

- Definition

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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