BUSINESS SEGMENTS INFORMATION - Results of Operations by Business Segments (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Sales	$ 4,619	$ 4,380	$ 4,376	$ 4,117	$ 4,090	$ 3,946	$ 3,756	$ 3,373		$ 17,492	$ 15,165	$ 13,804
Earnings (Loss)										2,020	2,903	2,432
Total Assets	44,246				42,746					44,246	42,746	35,672
Stock compensation										260	271	144
Gain on subordinated interest									$ 453	79	161	453
Eliminations/Interest										(175)	(34)	(194)
Segment Reconciling
Segment Reporting Information [Line Items]
Stock compensation										(260)	(250)	(125)
Unallocated pension and postretirement costs										144	171	99
Loss on Copeland note receivable										279	0	0
Gain on subordinated interest										79	161	453
Segment Reconciling | Related Party
Segment Reporting Information [Line Items]
Interest income from related party										86	41	0
Corporate and other
Segment Reporting Information [Line Items]
Earnings (Loss)										(664)	(224)	(419)
Total Assets	5,607				13,226					5,607	13,226	6,879
Eliminations/Interest
Segment Reporting Information [Line Items]
Sales										(68)	(71)	(86)
Eliminations/Interest										(175)	(34)	(194)
Intelligent Devices | Operating Segments
Segment Reporting Information [Line Items]
Sales										12,161	11,588	10,836
Earnings (Loss)										2,807	2,616	2,169
Total Assets	13,526				13,321					13,526	13,321	12,609
Intelligent Devices | Operating Segments | Final Control
Segment Reporting Information [Line Items]
Sales										4,204	3,970	3,607
Earnings (Loss)										977	865	592
Total Assets	5,706				5,614					5,706	5,614	4,805
Intelligent Devices | Operating Segments | Measurement & Analytical
Segment Reporting Information [Line Items]
Sales										4,061	3,595	3,215
Earnings (Loss)										1,056	936	785
Total Assets	4,122				3,976					4,122	3,976	4,395
Intelligent Devices | Operating Segments | Discrete Automation
Segment Reporting Information [Line Items]
Sales										2,506	2,635	2,612
Earnings (Loss)										466	509	542
Total Assets	2,470				2,493					2,470	2,493	2,284
Intelligent Devices | Operating Segments | Safety & Productivity
Segment Reporting Information [Line Items]
Sales										1,390	1,388	1,402
Earnings (Loss)										308	306	250
Total Assets	1,228				1,238					1,228	1,238	1,125
Software and Control | Operating Segments
Segment Reporting Information [Line Items]
Sales										5,399	3,648	3,054
Earnings (Loss)										282	422	449
Total Assets	25,113				16,199					25,113	16,199	16,184
Software and Control | Operating Segments | Control Systems & Software
Segment Reporting Information [Line Items]
Sales										2,842	2,606	2,398
Earnings (Loss)										645	529	437
Total Assets	2,262				2,151					2,262	2,151	1,700
Software and Control | Operating Segments | Test & Measurement
Segment Reporting Information [Line Items]
Sales										1,464	0	0
Earnings (Loss)										(290)	0	0
Total Assets	9,210				0					9,210	0	0
Software and Control | Operating Segments | AspenTech
Segment Reporting Information [Line Items]
Sales										1,093	1,042	656
Earnings (Loss)										(73)	(107)	12
Total Assets	$ 13,641				$ 14,048					$ 13,641	$ 14,048	$ 14,484