Revenue Recognition - Disaggregation of Revenue by Operating Segment and by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Sales	$ 8,342.0	$ 8,264.0	$ 9,058.0
North America
Disaggregation of Revenue [Line Items]
Sales	5,270.0	5,053.0	5,224.0
Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Sales	1,488.0	1,504.0	1,871.0
Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	1,024.0	1,073.0	1,358.0
Latin America
Disaggregation of Revenue [Line Items]
Sales	560.0	634.0	605.0
Intelligent Devices
Disaggregation of Revenue [Line Items]
Sales	3,756.0	3,804.0	4,098.0
Intelligent Devices \| North America
Disaggregation of Revenue [Line Items]
Sales	2,486.0	2,503.0	2,409.0
Intelligent Devices \| Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Sales	608.0	615.0	829.0
Intelligent Devices \| Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	391.0	399.0	569.0
Intelligent Devices \| Latin America
Disaggregation of Revenue [Line Items]
Sales	271.0	287.0	291.0
Software & Control
Disaggregation of Revenue [Line Items]
Sales	2,383.0	2,187.0	2,886.0
Software & Control \| North America
Disaggregation of Revenue [Line Items]
Sales	1,652.0	1,415.0	1,795.0
Software & Control \| Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Sales	341.0	350.0	528.0
Software & Control \| Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	244.0	261.0	394.0
Software & Control \| Latin America
Disaggregation of Revenue [Line Items]
Sales	146.0	161.0	169.0
Lifecycle Services
Disaggregation of Revenue [Line Items]
Sales	2,203.0	2,273.0	2,074.0
Lifecycle Services \| North America
Disaggregation of Revenue [Line Items]
Sales	1,132.0	1,135.0	1,020.0
Lifecycle Services \| Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Sales	539.0	539.0	514.0
Lifecycle Services \| Asia Pacific
Disaggregation of Revenue [Line Items]
Sales	389.0	413.0	395.0
Lifecycle Services \| Latin America
Disaggregation of Revenue [Line Items]
Sales	$ 143.0	$ 186.0	$ 145.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details