v2.4.0.6
Consolidated Statements of Cash Flows (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net income (loss) $ (9) $ (296)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization expense 151 [1] 140 [1]
Debt extinguishment costs 0 80
Deferred income taxes (1) (110)
(Gain) loss on sale of power plants and other, net 2 5
Unrealized mark-to-market activities, net (224) [2] 127 [2]
(Income) loss from unconsolidated investments in power projects (9) (9)
Stock-based compensation expense 6 5
Other 0 3
Change in operating assets and liabilities, net of effects of acquisitions:    
Accounts receivable 211 116
Derivative instruments, net (66) (13)
Other assets 20 65
Accounts payable and accrued expenses (153) (11)
Settlement of non-hedging interest rate swaps 151 43
Other liabilities (8) 4
Net cash provided by operating activities 71 149
Cash flows from investing activities:    
Purchases of property, plant and equipment (181) (144)
Settlement of non-hedging interest rate swaps (151) (43)
(Increase) decrease in restricted cash 23 52
Purchases of deferred transmission credits (8) (3)
Other 3 0
Net cash used in investing activities (314) (138)
Cash flows from financing activities:    
Borrowings under Term Loan and New Term Loan 0 1,300
Repayments on NDH Project Debt 0 (1,283)
Issuance of First Lien Notes 0 1,200
Repayments on First Lien Credit Facility 0 (1,184)
Borrowings from project financing, notes payable and other 114 0
Repayments of project financing, notes payable and other (38) (64)
Capital contributions from noncontrolling interest holder 0 8
Financing costs (5) (34)
Stock repurchases (6) 0
Other (4) (1)
Net cash provided by (used in) financing activities 61 (58)
Net increase (decrease) in cash and cash equivalents (182) (47)
Cash and cash equivalents, beginning of period 1,252 1,327
Cash and cash equivalents, end of period 1,070 1,280
Cash paid during the period for:    
Interest, net of amounts capitalized 226 156
Income taxes 6 6
Supplemental disclosure of non-cash investing and financing activities:    
Change in capital expenditures included in accounts payable $ 47 $ (2)
[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 income, hedge ineffectiveness and adjustments to reflect changes in credit default risk exposure