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Chapter 11 Filing Chapter 11 Filing (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Chapter 11 Filing [Abstract]    
Convertible senior notes $ 530  
Convertible Noteholders, Percent of New Common Stock 79.04%  
Convertible Noteholders, New Notes 200  
Preferred Stock, Dividend Rate, Percentage 12.75%  
Preferred Stock, Shares Outstanding 85,903  
Convertible preferred stock 113.9 113.9
Class of Warrant or Right, Outstanding 250,000  
Preferred Investors, Each, Percent of New Common Stock 7.98%  
Preferred Investors, Aggregate, Percent of New Common Stock 15.96%  
Preferred Investors, Each, New Notes 20.19  
Preferred Investors, Aggregate, New Notes 40.38  
Stockholders, Percent of New Common Stock 5.00%  
Debtor-in-Possession Financing, Amount Arranged 50  
Debtor-in-Possession Financing, Interest Rate on Borrowings 10.50%  
Debtor in Possession Financing, Borrowings and Repayments $ 3.0