Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other deductions, net [Line Items]
Amortization of intangibles intellectual property and customer relationships	$ 98	$ 71	$ 223	$ 223
Restructuring costs	31	28	50	111
Acquisition/divestiture costs	61	2	97	11
Foreign currency transaction gain (loss)	13	(1)	41	(7)
Investment-related gains & gains from sales of capital assets	0	0	(15)	(69)
Russia business exit - excluding restructuring expense	121	0	121	0
Other	(15)	(14)	(61)	(40)
Other deductions, net	283	88	374	243
Open Systems International Inc. [Member] | Order or Production Backlog
Other deductions, net [Line Items]
Amortization of intangible assets		$ 7		$ 24
AspenTech
Other deductions, net [Line Items]
Acquisition/divestiture costs	61		91
AspenTech | Other Nonoperating Income (Expense)
Other deductions, net [Line Items]
Amortization of intangible assets	$ 32		$ 32