Business Segment Information - Depreciation & Amortization (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 257	$ 222	$ 780	$ 571
Corporate, non-segment [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	12	9	24	26
Operating Segments [Member] | Final Control
Segment Reporting Information [Line Items]
Depreciation and amortization	39	53	129	156
Operating Segments [Member] | Measurement & Analytical Instrumentation [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	26	27	84	88
Operating Segments [Member] | Discrete Automation
Segment Reporting Information [Line Items]
Depreciation and amortization	20	22	63	67
Operating Segments [Member] | Safety & Productivity [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	15	15	44	44
Operating Segments [Member] | Intelligent Devices
Segment Reporting Information [Line Items]
Depreciation and amortization	100	117	320	355
Operating Segments [Member] | AspenTech
Segment Reporting Information [Line Items]
Depreciation and amortization	123	72	369	119
Operating Segments [Member] | Control Systems & Software
Segment Reporting Information [Line Items]
Depreciation and amortization	22	24	67	71
Operating Segments [Member] | Software and Control
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 145	$ 96	$ 436	$ 190