Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other deductions, net [Line Items]
Amortization of intangibles (intellectual property and customer relationships)	$ 60	$ 60	$ 178	$ 177
Restructuring costs	88	20	216	40
Special advisory fees	0	0	13	0
Other	33	(15)	(6)	(45)
Total	181	$ 65	401	$ 172
Change in gain (loss) from foreign currency exchange transactions	(25)
Change in pension expense (income)	$ 16		$ 46