CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash Flows from Operating Activities:
Net Income	$ 33	$ 223
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	211	196
Amortization of deferred financing costs	10	10
Deferred income taxes	166	102
Goodwill impairment	252	0
Step acquisition gain	(136)	0
Write-down of natural gas inventory	4	7
Equity in earnings of unconsolidated affiliates, net of distributions	(6)	3
Changes in other assets and liabilities:
Accounts receivable and unbilled revenues, net.	349	356
Accounts receivable/payable, affiliates	(2)	(12)
Inventory	8	(46)
Taxes receivable	(1)	61
Accounts payable	(164)	(218)
Fuel cost recovery	(72)	(52)
Interest and taxes accrued	22	22
Non-trading derivatives, net	16	(8)
Margin deposits, net	49	61
Other current assets	(16)	18
Other current liabilities	(16)	(33)
Other assets	2	5
Other liabilities	16	3
Other, net	4	2
Net cash provided by operating activities	729	700
Cash Flows from Investing Activities:
Capital expenditures, net of acquisitions	(368)	(483)
Acquisitions, net of cash acquired	(360)	0
Distributions from (investment in) unconsolidated affiliates	6	(9)
Other, net	(17)	10
Net cash used in investing activities	(739)	(482)
Cash Flows from Financing Activities:
Increase (decrease) in short-term borrowings, net	(9)	31
Payments of commercial paper, net	(285)	(41)
Proceeds from long-term debt	0	550
Payments of long-term debt	0	(606)
Cash paid for debt exchange	0	(58)
Debt issuance costs	0	(14)
Increase (decrease) in notes payable to affiliates	310	(81)
Net cash provided by (used in) financing activities	16	(219)
Net Increase (Decrease) in Cash and Cash Equivalents	6	(1)
Cash and Cash Equivalents at Beginning of Period	1	1
Cash and Cash Equivalents at End of Period	7	0
Cash Payments:
Interest, net of capitalized interest	113	123
Income taxes (refunds), net	3	(18)
Non-cash transactions:
Accounts payable related to capital expenditures	$ 55	$ 61