Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other deductions, net [Line Items]
Amortization of intangibles (intellectual property and customer relationships)	$ 59	$ 57
Restructuring costs	97	10
Special advisory fees	13	0
Other	9	(17)
Total	178	$ 50
Change in pension expense (income)	14
Change in gain (loss) from foreign currency exchange transactions	$ (15)