Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Other Deductions, Net [Abstract]
Amortization of intangibles	$ 57	$ 64	$ 115	$ 131
Rationalization of operations, expense	31	16	54	33
Other	22	40	33	37
Gains, net	(5)	(19)	(7)	(22)
Total	105	101	195	179
Joint Venture Ownership Acquisition Gain		$ 15