BUSINESS SEGMENTS - Schedule of Financial Information By Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	$ 4,346	$ 4,175
Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	2,201	2,124
AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,273	1,275
Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	872	776
Software & Systems
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,453	1,382
Software & Systems | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	690	669
Software & Systems | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	410	396
Software & Systems | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	353	317
Intelligent Devices
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	2,390	2,306
Intelligent Devices | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,142	1,098
Intelligent Devices | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	808	826
Intelligent Devices | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	440	382
Operating Segments | Safety & Productivity
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	503	487
Operating Segments | Americas | Safety & Productivity
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	369	357
Operating Segments | AMEA | Safety & Productivity
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	55	53
Operating Segments | Europe | Safety & Productivity
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	79	77
Operating Segments | Software & Systems | Control Systems & Software
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,044	1,023
Operating Segments | Software & Systems | Test & Measurement
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	409	359
Operating Segments | Software & Systems | Americas | Control Systems & Software
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	504	494
Operating Segments | Software & Systems | Americas | Test & Measurement
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	186	175
Operating Segments | Software & Systems | AMEA | Control Systems & Software
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	293	303
Operating Segments | Software & Systems | AMEA | Test & Measurement
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	117	93
Operating Segments | Software & Systems | Europe | Control Systems & Software
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	247	226
Operating Segments | Software & Systems | Europe | Test & Measurement
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	106	91
Operating Segments | Intelligent Devices | Sensors
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	996	972
Operating Segments | Intelligent Devices | Final Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,394	1,334
Operating Segments | Intelligent Devices | Americas | Sensors
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	492	485
Operating Segments | Intelligent Devices | Americas | Final Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	650	613
Operating Segments | Intelligent Devices | AMEA | Sensors
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	338	338
Operating Segments | Intelligent Devices | AMEA | Final Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	470	488
Operating Segments | Intelligent Devices | Europe | Sensors
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	166	149
Operating Segments | Intelligent Devices | Europe | Final Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	$ 274	$ 233