Business Segment Information - Depreciation & Amortization (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 263	$ 171	$ 523	$ 349
Corporate, non-segment [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	6	9	12	17
Operating Segments [Member] | Final Control
Segment Reporting Information [Line Items]
Depreciation and amortization	45	50	90	103
Operating Segments [Member] | Measurement & Analytical Instrumentation [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	28	30	58	61
Operating Segments [Member] | Discrete Automation
Segment Reporting Information [Line Items]
Depreciation and amortization	22	22	43	45
Operating Segments [Member] | Safety & Productivity [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	15	14	29	29
Operating Segments [Member] | Intelligent Devices
Segment Reporting Information [Line Items]
Depreciation and amortization	110	116	220	238
Operating Segments [Member] | AspenTech
Segment Reporting Information [Line Items]
Depreciation and amortization	123	24	246	47
Operating Segments [Member] | Control Systems & Software
Segment Reporting Information [Line Items]
Depreciation and amortization	24	22	45	47
Operating Segments [Member] | Software and Control
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 147	$ 46	$ 291	$ 94