Restructuring Costs - Schedule Of Restructuring Expense by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring [Line Items]
Expense	$ 83	$ 10
Corporate and other
Restructuring [Line Items]
Expense	26	8
Intelligent Devices
Restructuring [Line Items]
Expense	16	1
Software and Control
Restructuring [Line Items]
Expense	41	1
Final Control | Intelligent Devices | Operating Segments
Restructuring [Line Items]
Expense	3	(1)
Measurement & Analytical | Intelligent Devices | Operating Segments
Restructuring [Line Items]
Expense	3	1
Discrete Automation | Intelligent Devices | Operating Segments
Restructuring [Line Items]
Expense	10	1
Safety & Productivity | Intelligent Devices | Operating Segments
Restructuring [Line Items]
Expense	0	0
Control Systems & Software | Software and Control | Operating Segments
Restructuring [Line Items]
Expense	1	1
Test & Measurement | Software and Control | Operating Segments
Restructuring [Line Items]
Expense	40	0
AspenTech | Software and Control | Operating Segments
Restructuring [Line Items]
Expense	$ 0	$ 0