v2.4.0.6
Income Taxes (Textuals) (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Income Tax Expense (Benefit) [Abstract]      
Deferred income tax liability, net of current $ (2,000,000) $ 34,000,000  
Income Tax Disclosure (Textuals) [Abstract]      
One time tax benefit from consolidation   76,000,000  
Unrecognized Tax Benefits 74,000,000    
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    
Operating Loss Carryforwards Available To Offset Future Income     6,300,000,000
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%    
Emergence Date Capitalization 8,600,000,000    
Percent Change in Ownership Required To Trigger Transfer Restrictions 25.00%    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound 0    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound 2,000,000    
State and foreign tax expense benefit   $ 27,000,000