Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other deductions, net [Line Items]
Amortization of intangibles intellectual property and customer relationships	$ 120	$ 93	$ 357	$ 207
Restructuring costs	12	29	41	44
Acquisition/divestiture costs	38	61	48	91
Foreign currency transaction gain (loss)	(22)	11	(41)	38
Investment-related gains & gains from sales of capital assets	(26)	0	(63)	(16)
Loss from equity method investment	61	0	61	0
Russia business exit - excluding restructuring expense	0	121	47	121
Other	(36)	(29)	(112)	(79)
Other deductions, net	191	264	420	330
Unrealized Gain (Loss) on Derivatives	3		24
National Instruments
Other deductions, net [Line Items]
Debt and Equity Securities, Unrealized Gain (Loss)	12		47
AspenTech
Other deductions, net [Line Items]
Acquisition/divestiture costs		61		91
Amortization of intangible assets	99	49	297	49
AspenTech | Other Nonoperating Income (Expense)
Other deductions, net [Line Items]
Amortization of intangible assets	$ 65	$ 32	$ 193	$ 32