Business Segment Information - Depreciation & Amortization (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 260	$ 178
Corporate, non-segment [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	6	8
Operating Segments [Member] | Measurement & Analytical Instrumentation [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	30	31
Operating Segments [Member] | Final Control
Segment Reporting Information [Line Items]
Depreciation and amortization	45	53
Operating Segments [Member] | Discrete Automation
Segment Reporting Information [Line Items]
Depreciation and amortization	21	23
Operating Segments [Member] | Safety & Productivity [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	14	15
Operating Segments [Member] | Intelligent Devices
Segment Reporting Information [Line Items]
Depreciation and amortization	110	122
Operating Segments [Member] | AspenTech
Segment Reporting Information [Line Items]
Depreciation and amortization	123	23
Operating Segments [Member] | Control Systems & Software
Segment Reporting Information [Line Items]
Depreciation and amortization	21	25
Operating Segments [Member] | Software and Control
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 144	$ 48