Revenue Recognition - Schedule of Disaggregation of Revenue by Operating Segment and by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total Company Sales	$ 2,313	$ 2,144	$ 6,657	$ 6,026
North America
Disaggregation of Revenue [Line Items]
Total Company Sales	1,482	1,354	4,233	3,792
Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Total Company Sales	404	392	1,206	1,082
Asia Pacific
Disaggregation of Revenue [Line Items]
Total Company Sales	288	266	800	744
Latin America
Disaggregation of Revenue [Line Items]
Total Company Sales	139	132	418	408
Intelligent Devices
Disaggregation of Revenue [Line Items]
Total Company Sales	1,080	968	3,041	2,670
Intelligent Devices | North America
Disaggregation of Revenue [Line Items]
Total Company Sales	718	636	2,040	1,755
Intelligent Devices | Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Total Company Sales	190	160	506	446
Intelligent Devices | Asia Pacific
Disaggregation of Revenue [Line Items]
Total Company Sales	107	103	295	275
Intelligent Devices | Latin America
Disaggregation of Revenue [Line Items]
Total Company Sales	65	69	200	194
Software & Control
Disaggregation of Revenue [Line Items]
Total Company Sales	751	629	2,064	1,726
Software & Control | North America
Disaggregation of Revenue [Line Items]
Total Company Sales	514	431	1,408	1,199
Software & Control | Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Total Company Sales	110	94	310	245
Software & Control | Asia Pacific
Disaggregation of Revenue [Line Items]
Total Company Sales	87	70	224	177
Software & Control | Latin America
Disaggregation of Revenue [Line Items]
Total Company Sales	40	34	122	105
Lifecycle Services
Disaggregation of Revenue [Line Items]
Total Company Sales	482	547	1,552	1,630
Lifecycle Services | North America
Disaggregation of Revenue [Line Items]
Total Company Sales	250	287	785	838
Lifecycle Services | Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Total Company Sales	104	138	390	391
Lifecycle Services | Asia Pacific
Disaggregation of Revenue [Line Items]
Total Company Sales	94	93	281	292
Lifecycle Services | Latin America
Disaggregation of Revenue [Line Items]
Total Company Sales	$ 34	$ 29	$ 96	$ 109