GOODWILL AND OTHER INTANGIBLES - Schedule Of Change In Carry Amount Of Goodwill By Business Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 14,480	$ 13,946
Acquisitions	3,442	429
Foreign currency translation and other	145	105
Goodwill, ending balance	18,067	14,480
Operating Segments | Intelligent Devices | Final Control
Goodwill [Roll Forward]
Goodwill, beginning balance	2,660	2,616
Acquisitions	0	0
Foreign currency translation and other	42	44
Goodwill, ending balance	2,702	2,660
Operating Segments | Intelligent Devices | Measurement & Analytical
Goodwill [Roll Forward]
Goodwill, beginning balance	1,545	1,170
Acquisitions	0	374
Foreign currency translation and other	31	1
Goodwill, ending balance	1,576	1,545
Operating Segments | Intelligent Devices | Discrete Automation
Goodwill [Roll Forward]
Goodwill, beginning balance	892	807
Acquisitions	0	55
Foreign currency translation and other	27	30
Goodwill, ending balance	919	892
Operating Segments | Intelligent Devices | Safety & Productivity
Goodwill [Roll Forward]
Goodwill, beginning balance	388	364
Acquisitions	0	0
Foreign currency translation and other	16	24
Goodwill, ending balance	404	388
Operating Segments | Software and Control | Control Systems & Software
Goodwill [Roll Forward]
Goodwill, beginning balance	668	663
Acquisitions	0	0
Foreign currency translation and other	6	5
Goodwill, ending balance	674	668
Operating Segments | Software and Control | Test & Measurement
Goodwill [Roll Forward]
Goodwill, beginning balance	0	0
Acquisitions	3,442	0
Foreign currency translation and other	21	0
Goodwill, ending balance	3,463	0
Operating Segments | Software and Control | AspenTech
Goodwill [Roll Forward]
Goodwill, beginning balance	8,327	8,326
Acquisitions	0	0
Foreign currency translation and other	2	1
Goodwill, ending balance	$ 8,329	$ 8,327