Other Deductions, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Other deductions, net [Line Items]
Amortization of intangibles (intellectual property and customer relationships)	$ 357	$ 300	$ 239
Restructuring costs	86	150	284
Acquisition/divestiture costs	110	0	0
Foreign Currency Transaction Gain (Loss), Realized	7	4	21
Investment-related gains & gains from sales of capital assets	(30)	(69)	0
Russia Business Exit Loss - excluding restructuring expense	135	0	0
Other	(64)	(67)	(12)
Other deductions, net	601	318	532
Amortization of intangible assets	563	470	$ 369
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	50
Open Systems International, Inc. [Member]
Other deductions, net [Line Items]
Acquisition/divestiture costs		6
Open Systems International, Inc. [Member] | Backlog
Other deductions, net [Line Items]
Amortization of intangible assets		$ 30
AspenTech [Member]
Other deductions, net [Line Items]
Acquisition/divestiture costs	91
AspenTech [Member] | Other Nonoperating Income (Expense) [Member]
Other deductions, net [Line Items]
Amortization of intangible assets	$ 97