CONDENSED STATEMENTS OF CONSOLIDATED INCOME (Unaudited) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
CONDENSED STATEMENTS OF CONSOLIDATED INCOME (Unaudited) [Abstract]
Revenues	$ 707	$ 655	$ 1,802	$ 1,705
Expenses:
Operation and maintenance	230	217	661	615
Depreciation and amortization	179	173	453	450
Taxes other than income taxes	54	53	158	157
Total	463	443	1,272	1,222
Operating Income	244	212	530	483
Other Income (Expense):
Interest and other finance charges	(38)	(39)	(113)	(113)
Interest on transition and system restoration bonds	(31)	(34)	(96)	(106)
Return on true-up balance	352	0	352	0
Other, net	15	6	30	22
Total	298	(67)	173	(197)
Income Before Income Taxes and Extraordinary Item	542	145	703	286
Income tax expense	175	53	233	104
Income Before Extraordinary Item	367	92	470	182
Extraordinary Item, net of tax	598	0	598	0
Net Income	$ 965	$ 92	$ 1,068	$ 182