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Restructuring Costs - Schedule Of Restructuring Expense by Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | $ 72 | $ 75 | $ 132
Corporate and other |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 14 | 13 | 5
Intelligent Devices |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 48 | 51 | 114
Intelligent Devices | Operating Segments | Measurement & Analytical |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 9 | 3 | 58
Intelligent Devices | Operating Segments | Final Control |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 12 | 38 | 41
Intelligent Devices | Operating Segments | Discrete Automation |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 27 | 0 | 11
Intelligent Devices | Operating Segments | Safety & Productivity |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 0 | 10 | 4
Software and Control |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 10 | 11 | 13
Software and Control | Operating Segments | AspenTech |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 1 | 0 | 2
Software and Control | Operating Segments | Control Systems & Software |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | $ 9 | $ 11 | $ 11

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