BUSINESS SEGMENTS - Schedule of Financial Information By Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	$ 4,450	$ 4,393	$ 8,645	$ 8,529
Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	2,252	2,192	4,396	4,279
AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,331	1,306	2,606	2,547
Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	867	895	1,643	1,703
Intelligent Devices
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	3,029	3,061	5,872	5,883
Intelligent Devices | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,603	1,588	3,086	3,046
Intelligent Devices | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	910	918	1,802	1,791
Intelligent Devices | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	516	555	984	1,046
Intelligent Devices | Operating Segments | Final Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,073	1,051	2,049	1,991
Intelligent Devices | Operating Segments | Final Control | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	551	513	1,026	967
Intelligent Devices | Operating Segments | Final Control | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	391	404	780	774
Intelligent Devices | Operating Segments | Final Control | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	131	134	243	250
Intelligent Devices | Operating Segments | Measurement & Analytical
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,002	1,013	1,977	1,960
Intelligent Devices | Operating Segments | Measurement & Analytical | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	494	512	982	987
Intelligent Devices | Operating Segments | Measurement & Analytical | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	355	334	693	659
Intelligent Devices | Operating Segments | Measurement & Analytical | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	153	167	302	314
Intelligent Devices | Operating Segments | Discrete Automation
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	615	632	1,195	1,245
Intelligent Devices | Operating Segments | Discrete Automation | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	297	294	577	580
Intelligent Devices | Operating Segments | Discrete Automation | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	148	161	298	323
Intelligent Devices | Operating Segments | Discrete Automation | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	170	177	320	342
Intelligent Devices | Operating Segments | Safety & Productivity
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	339	365	651	687
Intelligent Devices | Operating Segments | Safety & Productivity | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	261	269	501	512
Intelligent Devices | Operating Segments | Safety & Productivity | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	16	19	31	35
Intelligent Devices | Operating Segments | Safety & Productivity | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	62	77	119	140
Software and Control
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,421	1,332	2,773	2,646
Software and Control | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	649	604	1,310	1,233
Software and Control | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	421	388	804	756
Software and Control | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	351	340	659	657
Software and Control | Operating Segments | Control Systems & Software
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	1,062	965	2,055	1,897
Software and Control | Operating Segments | Control Systems & Software | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	493	442	979	907
Software and Control | Operating Segments | Control Systems & Software | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	320	290	610	559
Software and Control | Operating Segments | Control Systems & Software | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	249	233	466	431
Software and Control | Operating Segments | Test & Measurement
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	359	367	718	749
Software and Control | Operating Segments | Test & Measurement | Americas
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	156	162	331	326
Software and Control | Operating Segments | Test & Measurement | AMEA
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	101	98	194	197
Software and Control | Operating Segments | Test & Measurement | Europe
Disaggregation of Revenue [Line Items]
Sales, excluding intersegment eliminations	$ 102	$ 107	$ 193	$ 226