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Net Income Per Share (Schedule of Income Per Share) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]            
Net (loss) from continuing operations $ (40.9) $ (92.1) $ (64.6) $ (121.4)    
Net income from discontinued operations 0 0.1 21.7 0.6    
Net (loss) (40.9) (92.0) (42.9) (120.8) 1,200.0 491.1
Net (loss) from continuing operations - if converted (40.9) (92.1) (64.6) (121.4)    
Net income from discontinued operations - if converted 0 0.1 21.7 0.6    
Net (loss) - if converted $ (40.9) $ (92.0) $ (42.9) $ (120.8)    
Weighted average common shares 5.0 5.0 5.0 5.0    
Less: Weighted average unvested restricted stock 0.1 0.1 0.1 0.1    
Denominator for basic calculation 4.9 4.9 4.9 4.9    
Convertible notes 1.8 1.8 1.8 1.8    
Convertible preferred stock - equivalent common shares 10.0 3.1 8.9 3.0    
Convertible preferred stock - less: share issuance limitation 9.1 2.2 8.0 2.1    
Convertible preferred stock - net allowable shares 0.9 0.9 0.9 0.9    
Subtotal 2.7 2.7 2.7 2.7    
Less: shares excluded in a period of net loss or antidilution 2.7 2.7 2.7 2.7    
Denominator for diluted calculation 4.9 4.9 4.9 4.9    
Net (loss) from continuing operations per share – basic and diluted $ (8.35) $ (18.80) $ (13.18) $ (24.78)    
Net income per share from discontinued operations - basic and diluted $ 0.00 $ 0.02 $ 4.43 $ 0.12    
Net (loss) per share – basic and diluted $ (8.35) $ (18.78) $ (8.76) $ (24.65)