Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other deductions, net [Line Items]
Amortization of intangibles	$ 56	$ 22
Restructuring costs	15	11
Other	17	0
Total	88	$ 33
Change in gain (loss) from foreign currency transactions	(22)
Acquisition/divestiture (costs) benefit	$ 4