CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities:
Net Income	$ 19	$ 36
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	154	147
Amortization of deferred financing costs	4	3
Deferred income taxes	(10)	(11)
Changes in other assets and liabilities:
Accounts and notes receivable, net	5	3
Accounts receivable/payable, affiliates	(69)	(6)
Inventory	(3)	(3)
Accounts payable	1	(21)
Taxes receivable	7	2
Interest and taxes accrued	(84)	(88)
Net regulatory assets and liabilities	15	22
Other current assets	14	4
Other current liabilities	0	(8)
Other assets	3	2
Other liabilities	0	(1)
Other, net	1	0
Net cash provided by operating activities	57	81
Cash Flows from Investing Activities:
Capital expenditures	(137)	(143)
Decrease in notes receivable from affiliates, net	256	1,010
Decrease (increase) in restricted cash of transition and system restoration bond companies	1	(15)
Other, net	(6)	(10)
Net cash provided by investing activities	114	842
Cash Flows from Financing Activities:
Proceeds from long-term debt	0	1,695
Payments of long-term debt	(612)	(151)
Dividend to parent	0	(1,685)
Debt issuance costs	0	(8)
Other, net	1	1
Net cash used in financing activities	(611)	(148)
Net Increase (Decrease) in Cash and Cash Equivalents	(440)	775
Cash and Cash Equivalents at Beginning of Period	646	220
Cash and Cash Equivalents at End of Period	206	995
Cash Payments:
Interest, net of capitalized interest	100	123
Income taxes (refunds), net	5	(1)
Non-cash transactions:
Accounts payable related to capital expenditures	$ 50	$ 47