Derivatives And Other Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income [Member] | Foreign currency forward contracts
Derivative [Line Items]
Gain (loss) on foreign currency contracts included in other income (expense)	$ 0	$ (4)	$ 1	$ (5)