Consolidated Condensed Statements of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Cash flows from operating activities:
Net loss	$ (366)		$ (162)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	279	[1]	298	[1]
Debt extinguishment cost	85		7
Deferred income taxes	(90)		(4)
Loss on disposal of assets	9		9
Unrealized mark-to-market activity, net	77		(62)
Income from unconsolidated investments in power plants	(7)		(13)
Return on unconsolidated investments in power plants	6		2
Stock-based compensation expense	12		12
Other	5		(1)
Change in operating assets and liabilities:
Accounts receivable	(68)		68
Derivative instruments	(29)		(81)
Other assets	58		171
Accounts payable and accrued expenses	166		(91)
Liabilities related to non-hedging interest rate swaps	103		14
Other liabilities	(1)		3
Net cash provided by operating activities	239		170
Cash flows from investing activities:
Purchases of property, plant and equipment	(341)		(97)
Cash acquired due to consolidation of OMEC			8
Purchases of deferred transmission credits	(8)
Decrease in restricted cash	30		224
Settlement of non-hedging interest rate swaps	(103)		(14)
Investing activities, other	1		3
Net cash provided by (used in) investing activities	(421)		124
Cash flows from financing activities:
Repayments of project financing, notes payable and other	(419)		(277)
Borrowings from project financing, notes payable and other	69
Repayment on NDH Project Debt	(1,283)
Borrowings under Term Loan	1,657
Issuance of First Lien Notes	1,200		400
Repayments on First Lien Credit Facility	(1,187)		(430)
Capital contributions from noncontrolling interest holder	34
Financing costs	(67)		(15)
Refund of financing costs			10
Other	(2)
Net cash used in financing activities	2		(312)
Net increase (decrease) in cash and cash equivalents	(180)		(18)
Cash and cash equivalents, beginning of period	1,327		989
Cash and cash equivalents, end of period	1,147		971
Cash paid during the period for:
Interest, net of amounts capitalized	292		362
Income taxes	12		9
Supplemental disclosure of non-cash investing and financing activities:
Change in capital expenditures included in accounts payable	$ 21		$ (7)

[1] Includes depreciation and amortization that is also recorded in fuel and purchased energy expense, interest expense and discontinued operations on our Consolidated Condensed Statements of Operations.