BUSINESS SEGMENTS - Schedule of Depreciation & Amortization (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Segment Reporting Information [Line Items]
Total Assets	$ 41,939	$ 42,610	$ 41,964
Depreciation and Amortization	359	383
Software & Systems
Segment Reporting Information [Line Items]
Total Assets	24,717	25,000
Depreciation and Amortization	241	267
Intelligent Devices
Segment Reporting Information [Line Items]
Total Assets	11,750	11,141
Depreciation and Amortization	89	86
Operating Segments | Safety & Productivity
Segment Reporting Information [Line Items]
Total Assets	1,887	1,779
Depreciation and Amortization	19	19
Operating Segments | Software & Systems | Control Systems & Software
Segment Reporting Information [Line Items]
Total Assets	15,995	16,036
Depreciation and Amortization	122	149
Operating Segments | Software & Systems | Test & Measurement
Segment Reporting Information [Line Items]
Total Assets	8,722	8,964
Depreciation and Amortization	119	118
Operating Segments | Intelligent Devices | Sensors
Segment Reporting Information [Line Items]
Total Assets	4,209	3,995
Depreciation and Amortization	33	31
Operating Segments | Intelligent Devices | Final Control
Segment Reporting Information [Line Items]
Total Assets	7,541	7,146
Depreciation and Amortization	56	55
Corporate and other
Segment Reporting Information [Line Items]
Total Assets	3,585	4,690
Depreciation and Amortization	$ 10	$ 11