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Income (Loss) Per Common Share (Details 2)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Per Common Share      
Potentially securities excluded from the calculation of diluted net income (loss) per share (in shares) 0.6    
Stock options and Restricted stock
     
Income Per Common Share      
Potentially securities excluded from the calculation of diluted net income (loss) per share (in shares) 1.3 1.3 0.7