CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows from Operating Activities:
Net income	$ 180	$ 139
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	131	123
Amortization of deferred financing costs	6	4
Deferred income taxes	75	(1)
Equity in earnings of unconsolidated affiliates, net of distributions	1	6
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	305	434
Accounts receivable/payable, affiliates	(6)	(12)
Inventory	68	24
Taxes receivable	61	47
Accounts payable	(213)	(236)
Fuel cost over (under) recovery	(19)	93
Interest and taxes accrued	(2)	50
Non-trading derivatives, net	0	3
Margin deposits, net	48	(18)
Other current assets	19	(6)
Other current liabilities	(28)	(14)
Other assets	4	1
Other liabilities	7	(8)
Other, net	1	0
Net cash provided by operating activities	638	629
Cash Flows from Investing Activities:
Capital expenditures	(318)	(449)
Investment in unconsolidated affiliates	(7)	(22)
Other, net	1	(1)
Net cash used in investing activities	(324)	(472)
Cash Flows from Financing Activities:
Decrease in short-term borrowings, net	(14)	(23)
Proceeds from commercial paper, net	(113)	0
Proceeds from long-term debt	550	0
Payments of long-term debt	(606)	(45)
Cash paid for debt exchange	(58)	0
Debt issuance costs	(9)	0
Decrease in notes payable to affiliates	(60)	(89)
Net cash used in financing activities	(310)	(157)
Net Increase in Cash and Cash Equivalents	4	0
Cash and Cash Equivalents at Beginning of Period	1	1
Cash and Cash Equivalents at End of Period	5	1
Cash Payments:
Interest, net of capitalized interest	90	97
Income taxes (refunds), net	(19)	15
Non-cash transactions:
Accounts payable related to capital expenditures	$ 47	$ 61