BUSINESS SEGMENTS INFORMATION - Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Depreciation and Amortization	$ 1,689	$ 1,051	$ 842
Capital Expenditures	419	363	299
Corporate and other
Segment Reporting Information [Line Items]
Depreciation and Amortization	46	37	33
Capital Expenditures	62	47	21
Intelligent Devices | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and Amortization	442	432	474
Capital Expenditures	284	277	247
Intelligent Devices | Operating Segments | Final Control
Segment Reporting Information [Line Items]
Depreciation and Amortization	159	170	212
Capital Expenditures	93	93	62
Intelligent Devices | Operating Segments | Measurement & Analytical
Segment Reporting Information [Line Items]
Depreciation and Amortization	138	121	117
Capital Expenditures	84	93	90
Intelligent Devices | Operating Segments | Discrete Automation
Segment Reporting Information [Line Items]
Depreciation and Amortization	87	84	88
Capital Expenditures	61	56	68
Intelligent Devices | Operating Segments | Safety & Productivity
Segment Reporting Information [Line Items]
Depreciation and Amortization	58	57	57
Capital Expenditures	46	35	27
Software and Control | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and Amortization	1,201	582	335
Capital Expenditures	73	39	31
Software and Control | Operating Segments | Control Systems & Software
Segment Reporting Information [Line Items]
Depreciation and Amortization	101	90	93
Capital Expenditures	39	33	27
Software and Control | Operating Segments | Test & Measurement
Segment Reporting Information [Line Items]
Depreciation and Amortization	607	0	0
Capital Expenditures	27	0	0
Software and Control | Operating Segments | AspenTech
Segment Reporting Information [Line Items]
Depreciation and Amortization	493	492	242
Capital Expenditures	$ 7	$ 6	$ 4