v2.4.0.6
Income Taxes (Textuals) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Intraperiod income tax [Line Items]        
Deferred Tax Assets, Operating Loss Carryforwards, Domestic $ 7,900,000,000      
Income Tax Expense (Benefit) [Abstract]        
Deferred income tax liability, net of current 42,000,000 (86,000,000) 43,000,000  
Federal statutory tax expense (benefit) rate (35.00%) (35.00%) 35.00%  
Income Tax Disclosure (Textuals) [Abstract]        
One time tax benefit from consolidation 76,000,000      
Unrecognized Tax Benefits 74,000,000 88,000,000 98,000,000 90,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 28,000,000      
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward 46,000,000      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 20,000,000      
Cancellation of Debt Income Related to Stock Distribution 66,000,000      
Cancellation of Debt Income Related to Stock Distribution for State Income Tax Purposes 39,000,000      
Operating Loss Carryforwards 7,900,000,000      
Operating Loss Carryforwards Available To Offset Future Income 6,300,000,000      
Operating Loss Carryforwards Not Limited On Use 2,400,000,000      
NOLs expected to expire unutilized 640,000,000      
Percent Decline In Market Cap Required To Trigger Transfer Restrictions 35.00%      
Holders with ownership that could be affected by transfer restrictions 5.00%      
Reduction In State NOLs 44,000,000      
Reduction Of State Taxable Income 24,000,000      
Valuation allowance 2,336,000,000 2,386,000,000    
Valuation Allowance, Deferred Tax Asset, Change in Amount (50,000,000) (186,000,000) (113,000,000)  
Emergence Date Capitalization 8,600,000,000      
Percent Change in Ownership Required To Trigger Transfer Restrictions 25.00%      
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 4,200,000,000      
Deferred Tax Assets, Operating Loss Carryforwards, Foreign 1,000,000,000      
Intraperiod tax expense from a prior period [Member]
        
Income Tax Expense (Benefit) [Abstract]        
Deferred income tax liability, net of current   $ 13,000,000