STATEMENTS OF CONSOLIDATED CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities:
Net Income	$ 279	$ 1,086	$ 200
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	729	587	582
Amortization of deferred financing costs	14	12	12
Deferred income taxes	(69)	149	(6)
Extraordinary Item, net of tax	0	(598)	0
Return on true-up balance	0	(352)	0
Changes in other assets and liabilities:
Accounts and notes receivable, net	(24)	(25)	12
Accounts receivable/payable, affiliates	62	(1)	1
Inventory	(14)	(9)	(2)
Accounts payable	(20)	19	9
Taxes receivable	(5)	61	(9)
Interest and taxes accrued	(15)	4	4
Net regulatory assets and liabilities	28	(28)	(30)
Other current assets	1	0	1
Other current liabilities	14	24	13
Other liabilities	3	(5)	2
Other, net	(3)	1	0
Net cash provided by operating activities	980	925	789
Cash Flows from Investing Activities:
Capital expenditures	(609)	(606)	(566)
Decrease (increase) in notes receivable from affiliates, net	577	(111)	(610)
Increase in restricted cash of transition and system restoration bond companies	(13)	(3)	(5)
Cash received from U.S. Department of Energy grant	0	110	90
Other, net	(20)	(7)	2
Net cash used in investing activities	(65)	(617)	(1,089)
Cash Flows from Financing Activities:
Proceeds from long-term debt	2,495	0	0
Payments of long-term debt	(1,215)	(283)	(241)
Dividend to parent	(1,685)	0	0
Cash paid for debt retirements	(69)	0	0
Debt issuance costs	(16)	(3)	0
Other, net	1	0	0
Net cash used in financing activities	(489)	(286)	(241)
Net Increase (Decrease) in Cash and Cash Equivalents	426	22	(541)
Cash and Cash Equivalents at Beginning of the Year	220	198	739
Cash and Cash Equivalents at End of the Year	646	220	198
Cash Payments:
Interest, net of capitalized interest	293	282	292
Income taxes	183	42	111
Non-cash transactions:
Accounts payable related to capital expenditures	$ 44	$ 54	$ 37