CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operating Activities:
Net Income	$ 1,086	$ 200	$ 208
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	587	582	480
Amortization of deferred financing costs	12	12	23
Deferred income taxes	149	(6)	16
Extraordinary Item, net of tax	(598)	0	0
Return on true-up balance	(352)	0	0
Changes in other assets and liabilities:
Accounts and notes receivable, net	(25)	12	44
Accounts receivable/payable, affiliates	(1)	1	17
Inventory	(9)	(2)	5
Accounts payable	19	9	(78)
Taxes receivable	61	(9)	(46)
Interest and taxes accrued	4	4	2
Net regulatory assets and liabilities	(28)	(30)	(63)
Other current assets	0	1	(2)
Other current liabilities	24	13	(28)
Other assets	0	0	(3)
Other liabilities	(5)	2	(13)
Other, net	1	0	0
Net cash provided by operating activities	925	789	562
Cash Flows from Investing Activities:
Capital expenditures	(606)	(566)	(442)
Increase in notes receivable from affiliates	(111)	(610)	(289)
Decrease (increase) in restricted cash of transition and system restoration bond companies	(3)	(5)	26
Cash received from U.S. Department of Energy grant	110	90	0
Other, net	(7)	2	28
Net cash used in investing activities	(617)	(1,089)	(677)
Cash Flows from Financing Activities:
Revolving credit facility, net	0	0	(251)
Proceeds from long-term debt	0	0	1,165
Payments of long-term debt	(283)	(241)	(208)
Decrease in short-term notes payable with affiliates	0	0	(8)
Debt issuance costs	(3)	0	(10)
Net cash provided by (used in) financing activities	(286)	(241)	688
Net Increase (Decrease) in Cash and Cash Equivalents	22	(541)	573
Cash and Cash Equivalents at Beginning of the Year	198	739	166
Cash and Cash Equivalents at End of the Year	220	198	739
Cash Payments:
Interest, net of capitalized interest	282	292	287
Income taxes (refunds), net	42	111	134
Non-cash transactions:
Accounts payable related to capital expenditures	$ 54	$ 37	$ 28