Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other deductions, net [Line Items]
Amortization of intangibles intellectual property and customer relationships	$ 118	$ 57
Restructuring costs	10	6
Acquisition/divestiture costs	0	23
Foreign currency transaction gain (loss)	7	7
Investment-related gains & gains from sales of capital assets	(4)	(15)
Russia business exit - excluding restructuring expense	47	0
Other	(44)	(26)
Other deductions, net	120	38
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	35
AspenTech
Other deductions, net [Line Items]
Acquisition/divestiture costs		$ 22
Amortization of intangible assets	99
AspenTech | Other Nonoperating Income (Expense)
Other deductions, net [Line Items]
Amortization of intangible assets	$ 64