Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Other deductions, net [Line Items]
Amortization of intangibles (intellectual property and customer relationships)	$ 63	$ 78
Restructuring costs	9	66
Other	(21)	(22)
Other deductions, net	51	122
Change in gain (loss) from foreign currency exchange transactions	25
Gain (loss) from acquiring the remaining interest of an equity investment		17
Gain (loss) from an investment sales		21
Proceeds from Sale of Productive Assets	15
Open Systems International Inc. [Member] | Order or Production Backlog [Member]
Other deductions, net [Line Items]
Backlog amortization		$ 11
AspenTech [Member]
Other deductions, net [Line Items]
Business Acquisition, Transaction Costs	$ 23