Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Other deductions, net [Line Items]
Amortization of intangibles	$ 54	$ 57	$ 113	$ 115
Rationalization of operations	16	31	32	54
Other	(10)	22	1	33
Gains, net	(1)	(5)	(1)	(7)
Total	$ 59	$ 105	$ 145	$ 195