Restructuring Costs (Details) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			$ 176
Restructuring expense	$ 10	$ 17	19	$ 83
Restructuring utilized/paid			49
Ending restructuring liability	146		$ 146
Total number of employee workforce reductions			200
Cost of sales and selling, general, and administrative expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	5	4	$ 14	7
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			172
Restructuring expense			5
Restructuring utilized/paid			32
Ending restructuring liability	145		145
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			4
Restructuring expense			14
Restructuring utilized/paid			17
Ending restructuring liability	1		1
Automation Solutions [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	8	12	13	76
Commercial & Residential Solutions [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	2	4	5	6
Climate Technologies [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	1	3	3	4
Tools & Home Products [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	1	1	2	2
Corporate [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	$ 0	$ 1	$ 1	$ 1
Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year restructuring expense					$ 150