Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other deductions, net [Line Items]
Amortization of intangibles	$ 47	$ 41	$ 154	$ 84
Restructuring costs	14	21	38	45
Other	27	25	83	74
Total	$ 88	$ 87	275	$ 203
Increase (decrease) in bad debt expense			(11)
Acquisition/divestiture (costs) benefit			$ (16)