Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Other deductions, net [Line Items]
Amortization of intangibles	$ 22	$ 22
Restructuring costs	11	7
Other	0	25
Total	33	54
Change in gain (loss) from foreign currency transactions	34
Foreign Currency Transaction Gain (Loss), Realized	$ 13	$ (21)