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Business Segment Information - Schedule of Reportable Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |
Sales | $ 8,342.0 | $ 8,264.0 | $ 9,058.0
Segment cost of sales | (4,326.0) | (4,413.0) | (4,635.0)
Segment selling, general and administrative expenses | (1,914.0) | (2,001.0) | (2,024.0)
Segment engineering and development expenses | 679.0 | 658.0 | 706.0
Segment operating earnings | 1,703.0 | 1,595.0 | 1,929.0
Sales and operating results of reportable segments |  |  |
Purchase accounting depreciation and amortization, and impairment | (365.0) | (144.0) | (264.0)
Corporate and other | (125.0) | (114.0) | (110.0)
Non-operating pension and postretirement benefit (cost) credit | (1.0) | 20.0 | (83.0)
Net legacy asbestos and environmental charges | (154.0) | (21.0) | (18.0)
Change in fair value of investments | (3.0) | 0.0 | 279.0
Restructuring reversals | 5.0 | (97.0) | 0.0
Interest expense, net | (143.0) | (139.0) | (125.0)
Income before income taxes | 917.0 | 1,100.0 | 1,608.0
Intelligent Devices |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3,756.0 | 3,804.0 | 4,098.0
Intelligent Devices | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3,756.0 | 3,804.0 | 4,098.0
Segment cost of sales | (2,045.0) | (2,072.0) | (2,182.0)
Segment selling, general and administrative expenses | (761.0) | (783.0) | (815.0)
Segment engineering and development expenses | (266.0) | (254.0) | (268.0)
Other segment items | (8.0) | 5.0 | (5.0)
Segment operating earnings | 676.0 | 700.0 | 828.0
Software & Control |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 2,383.0 | 2,187.0 | 2,886.0
Software & Control | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 2,383.0 | 2,187.0 | 2,886.0
Segment cost of sales | (697.0) | (678.0) | (869.0)
Segment selling, general and administrative expenses | (612.0) | (630.0) | (665.0)
Segment engineering and development expenses | (361.0) | (351.0) | (399.0)
Other segment items | (5.0) | 2.0 | 0.0
Segment operating earnings | 708.0 | 530.0 | 953.0
Lifecycle Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 2,203.0 | 2,273.0 | 2,074.0
Lifecycle Services | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 2,203.0 | 2,273.0 | 2,074.0
Segment cost of sales | (1,459.0) | (1,496.0) | (1,508.0)
Segment selling, general and administrative expenses | (377.0) | (363.0) | (382.0)
Segment engineering and development expenses | (52.0) | (46.0) | (43.0)
Other segment items | 4.0 | (3.0) | 7.0
Segment operating earnings | $ 319.0 | $ 365.0 | $ 148.0

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