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Liabilities Subject to Compromise Liabilities Subject to Compromise (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Liabilities Subject to Compromise [Abstract]    
Liabilities Subject to Compromise, Accounts Payable and Accrued Liabilities $ 1.5  
Liabilities Subject to Compromise, 3% Convertible Senior Notes and Accrued Interest 538.2  
Liabilities Subject to Compromise, Convertible Preferred Stock and Paid-in-Kind Dividends Payable 113.9  
Liabilities Subject to Compromise $ 653.6 $ 0
Convertible Senior Notes, Interest Rate 3.00%