Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Other deductions, net [Line Items]
Amortization of intangibles intellectual property and customer relationships	$ 119	$ 57	$ 237	$ 114
Restructuring costs	19	9	29	15
Acquisition/divestiture costs	10	7	10	30
Foreign currency transaction gain (loss)	(26)	20	(19)	27
Investment-related gains & gains from sales of capital assets	(35)	0	(39)	(15)
Russia business exit - excluding restructuring expense	0	0	47	0
Other	(30)	(25)	(74)	(51)
Other deductions, net	109	28	229	66
Unrealized Gain (Loss) on Derivatives	(14)		21
National Instruments
Other deductions, net [Line Items]
Debt and Equity Securities, Unrealized Gain (Loss)	35
AspenTech
Other deductions, net [Line Items]
Acquisition/divestiture costs		$ 7		$ 30
Amortization of intangible assets	99		198
AspenTech | Other Nonoperating Income (Expense)
Other deductions, net [Line Items]
Amortization of intangible assets	$ 64		$ 128