Consolidated Condensed Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (13)		$ (125)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense(1)	164	[1]	158	[1]
Deferred income taxes	(13)		(7)
Unrealized mark-to-market activity, net	72	[2]	55	[2]
(Income) from unconsolidated investments in power plants	(9)		(8)
Return on unconsolidated investments in power plants	13		0
Stock-based compensation expense	10		8
Other	(2)		0
Change in operating assets and liabilities:
Accounts receivable	(75)		(45)
Derivative instruments, net	(87)		(36)
Other assets	29		(73)
Accounts payable and accrued expenses	106		(91)
Other liabilities	(72)		7
Net cash provided by (used in) operating activities	123		(157)
Cash flows from investing activities:
Purchases of property, plant and equipment	(119)		(176)
Purchase of Guadalupe Power Plant, net of cash	(656)		0
Decrease in restricted cash	6		54
Net cash used in investing activities	(769)		(122)
Cash flows from financing activities:
Borrowings under CCFC Term Loans	420		0
Repayments of Debt	(11)		(6)
Borrowings from project financing, notes payable and other	1		73
Repayments of project financing, notes payable and other	(43)		(36)
Financing costs	(10)		(9)
Stock repurchases	(140)		(75)
Proceeds from exercises of stock options	3		9
Other	0		1
Net cash provided by (used in) financing activities	220		(43)
Net decrease in cash and cash equivalents	(426)		(322)
Cash and cash equivalents, beginning of period	941		1,284
Cash and cash equivalents, end of period	515		962
Cash paid during the period for:
Interest, net of amounts capitalized	225		213
Income taxes	8		5
Supplemental disclosure of non-cash investing activities:
Change in capital expenditures included in accounts payable	$ (9)		$ 17

[1] Includes depreciation and amortization included in fuel and purchased energy expense and interest expense on our Consolidated Condensed Statements of Operations

[2] In addition to changes in market value on derivatives not designated as hedges, changes in unrealized gain (loss) also includes de-designation of interest rate swap cash flow hedges and related reclassification from AOCI into earnings, hedge ineffectiveness and adjustments to reflect changes in credit default risk exposure.