Restructuring Costs (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			$ 176
Restructuring expense	$ 31	$ 28	50	$ 111
Restructuring utilized/paid			81
Ending restructuring liability	145		$ 145
Total number of employee workforce reductions			1,400
Cost of sales and selling, general, and administrative expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	12	4	$ 26	11
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			172
Restructuring expense			20
Restructuring utilized/paid			52
Ending restructuring liability	140		140
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning restructuring liability			4
Restructuring expense			30
Restructuring utilized/paid			29
Ending restructuring liability	5		5
Automation Solutions [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	20	20	33	92
AspenTech
Restructuring Reserve [Roll Forward]
Restructuring expense	1	(2)	1	2
Commercial & Residential Solutions [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	1	6	6	12
Climate Technologies [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	2	4	5	8
Tools & Home Products [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	(1)	2	1	4
Corporate [Member]
Restructuring Reserve [Roll Forward]
Restructuring expense	$ 9	$ 4	$ 10	$ 5
Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year restructuring expense					$ 150