Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 221	$ 239	$ 452	$ 483
Corporate, non-segment [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	9	16	18	36
Operating Segments [Member] | Automation Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	147	156	302	312
Operating Segments [Member] | Commercial & Residential Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	65	67	132	135
Operating Segments [Member] | Climate Technologies [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	46	47	93	96
Operating Segments [Member] | Tools & Home Products [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 19	$ 20	$ 39	$ 39