CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities:
Net income (loss)	$ (2)	$ 33
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	182	211
Amortization of deferred financing costs	8	10
Deferred income taxes	307	166
Goodwill impairment	0	252
Step acquisition gain	0	(136)
Write-down of natural gas inventory	4	4
Equity in earnings of unconsolidated affiliates, net of distributions	(65)	(6)
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net	255	349
Accounts receivable/payable - affiliated companies	(6)	(2)
Inventory	(103)	8
Taxes receivable	(8)	(1)
Accounts payable	(152)	(164)
Fuel cost recovery	105	(72)
Interest and taxes accrued	2	22
Non-trading derivatives, net	(6)	16
Margin deposits, net	5	49
Other current assets	19	(16)
Other current liabilities	(20)	(16)
Other assets	(11)	2
Other liabilities	17	16
Other, net	3	4
Net cash provided by operating activities	534	729
Cash Flows from Investing Activities:
Capital expenditures, net of acquisitions	(371)	(368)
Acquisitions, net of cash acquired	0	(360)
Distributions from unconsolidated affiliates	0	6
Cash contribution to Enable	(38)	0
Other, net	1	(17)
Net cash used in investing activities	(408)	(739)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	32	(9)
Payments of commercial paper, net	0	(285)
Proceeds from long-term debt	1,050	0
Payments of long-term debt	(525)	0
Debt issuance costs	(1)	0
Increase (decrease) in notes payable - affiliated companies	(679)	310
Net cash provided by (used in) financing activities	(123)	16
Net Increase in Cash and Cash Equivalents	3	6
Cash and Cash Equivalents at Beginning of Period	1	1
Cash and Cash Equivalents at End of Period	4	7
Cash Payments:
Interest, net of capitalized interest	113	113
Income taxes, net	1	3
Non-cash transactions:
Accounts payable related to capital expenditures	$ 28	$ 55