BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information by Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	$ 18,091	$ 17,560	$ 15,236
Property, Plant and Equipment	2,871	2,807	2,363
Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	9,214	8,798	7,808
Property, Plant and Equipment	1,717	1,672	1,442
AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	5,449	5,318	4,597
Property, Plant and Equipment	601	542	428
Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	3,428	3,444	2,831
Property, Plant and Equipment	553	593	493
Intelligent Devices
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	12,400	12,161	11,588
Intelligent Devices | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	6,476	6,282	6,079
Intelligent Devices | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	3,820	3,748	3,493
Intelligent Devices | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,104	2,131	2,016
Intelligent Devices | Operating Segments | Final Control
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	4,381	4,204	3,970
Intelligent Devices | Operating Segments | Final Control | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,164	2,010	1,949
Intelligent Devices | Operating Segments | Final Control | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,662	1,647	1,481
Intelligent Devices | Operating Segments | Final Control | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	555	547	540
Intelligent Devices | Operating Segments | Measurement & Analytical
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	4,144	4,061	3,595
Intelligent Devices | Operating Segments | Measurement & Analytical | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,052	2,046	1,847
Intelligent Devices | Operating Segments | Measurement & Analytical | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,461	1,382	1,222
Intelligent Devices | Operating Segments | Measurement & Analytical | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	631	633	526
Intelligent Devices | Operating Segments | Discrete Automation
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,520	2,506	2,635
Intelligent Devices | Operating Segments | Discrete Automation | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,218	1,178	1,234
Intelligent Devices | Operating Segments | Discrete Automation | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	630	646	720
Intelligent Devices | Operating Segments | Discrete Automation | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	672	682	681
Intelligent Devices | Operating Segments | Safety & Productivity
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,355	1,390	1,388
Intelligent Devices | Operating Segments | Safety & Productivity | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,042	1,048	1,049
Intelligent Devices | Operating Segments | Safety & Productivity | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	67	73	70
Intelligent Devices | Operating Segments | Safety & Productivity | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	246	269	269
Software & Control
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	5,691	5,399	3,648
Software & Control | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,738	2,516	1,729
Software & Control | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,629	1,570	1,104
Software & Control | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,324	1,313	815
Software & Control | Operating Segments | Control Systems & Software
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	4,205	3,935	3,648
Software & Control | Operating Segments | Control Systems & Software | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	2,042	1,862	1,729
Software & Control | Operating Segments | Control Systems & Software | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,238	1,181	1,104
Software & Control | Operating Segments | Control Systems & Software | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	925	892	815
Software & Control | Operating Segments | Test & Measurement
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	1,486	1,464	0
Software & Control | Operating Segments | Test & Measurement | Americas
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	696	654	0
Software & Control | Operating Segments | Test & Measurement | AMEA
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	391	389	0
Software & Control | Operating Segments | Test & Measurement | Europe
Segment Reporting Information [Line Items]
Sales, excluding intersegment eliminations	$ 399	$ 421	$ 0