Business Segment Information - Schedule of Depreciation and Amortization for Reportable Segments and Corporate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Amortization of acquisition-related intangible assets	$ 30	$ 35	$ 91	$ 106
Total	79	81	237	240
Operating Segments
Segment Reporting [Line Items]
Total	49	46	146	134
Operating Segments | Intelligent Devices
Segment Reporting [Line Items]
Total	21	14	58	46
Operating Segments | Software & Control
Segment Reporting [Line Items]
Total	17	19	56	52
Operating Segments | Lifecycle Services
Segment Reporting [Line Items]
Total	9	11	28	32
Corporate
Segment Reporting [Line Items]
Total	$ 2	$ 2	$ 4	$ 4