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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 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]            
Net (loss) from continuing operations $ (44.3) $ 5.0 $ (108.9) $ (116.4)    
Net income (loss) from discontinued operations 0 (0.5) 21.7 0.1    
Net income (loss) (44.3) 4.5 (87.2) (116.3) 1,200.0 491.1
Net (loss) from continuing operations - if converted (44.3) 5.0 (108.9) (116.4)    
Net income from discontinued operations - if converted 0 (0.5) 21.7 0.1    
Net (loss) - if converted $ (44.3) $ 4.5 $ (87.2) $ (116.3)    
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 13.7 4.3 10.5 3.5    
Convertible preferred stock - less: share issuance limitation 12.8 3.4 9.6 2.6    
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 income (loss) from continuing operations per share – basic and diluted $ (9.04) $ 1.02 $ (22.22) $ (23.75)    
Net income per share from discontinued operations - basic and diluted $ 0.00 $ (0.10) $ 4.43 $ 0.02    
Net income (loss) per share – basic and diluted $ (9.04) $ 0.92 $ (17.79) $ (23.73)