v2.4.0.8
Consolidated Condensed Statements of Cash Flows (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Cash flows from operating activities:    
Net income $ 111 $ 99
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense(1) 474 [1] 449 [1]
Debt extinguishment costs 28 0
Deferred income taxes 18 (7)
Loss on disposition of assets 5 10
Unrealized mark-to-market activity, net (14) [2] (103) [2]
(Income) from unconsolidated investments in power plants (25) (21)
Return on unconsolidated investments in power plants 23 20
Stock-based compensation expense 28 19
Other (2) 1
Change in operating assets and liabilities:    
Accounts receivable (219) 96
Derivative instruments, net 47 (114)
Other assets (111) 97
Accounts payable and accrued expenses (11) (119)
Settlement of non-hedging interest rate swaps 0 156
Other liabilities 63 25
Net cash provided by operating activities 415 608
Cash flows from investing activities:    
Purchases of property, plant and equipment (472) (509)
Settlement of non-hedging interest rate swaps 0 (156)
Return of investment in unconsolidated investment in power plants 1 5
(Increase) decrease in restricted cash 5 (32)
Purchases of deferred transmission credits 0 (12)
Other (2) 3
Net cash used in investing activities (468) (701)
Cash flows from financing activities:    
Repayment under First Lien Term Loans (19) (12)
Borrowings from CCFC Term Loans 1,197 0
Repayments under CCFC Term Loans (3) 0
Repayment of CCFC Notes (1,000) 0
Borrowings from project financing, notes payable and other 139 312
Repayments of project financing, notes payable and other (51) (53)
Financing costs (27) (6)
Stock repurchases (462) (308)
Proceeds from exercises of stock options 19 4
Other 0 1
Net cash used in financing activities (207) (62)
Net decrease in cash and cash equivalents (260) (155)
Cash and cash equivalents, beginning of period 1,284 1,252
Cash and cash equivalents, end of period 1,024 1,097
Cash paid during the period for:    
Interest, net of amounts capitalized 547 565
Income taxes 22 14
Supplemental disclosure of non-cash investing activities:    
Change in capital expenditures included in accounts payable 10 (3)
Additions to property, plant and equipment through assumption of long-term note payable $ 0 $ 8
[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 hedge ineffectiveness and adjustments to reflect changes in credit default risk exposure.