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Net Income Per Share (Tables)
 12 Months Ended
Dec. 31, 2011
Net Income Per Share  
Schedule of Net Income Per Share
   
Years Ended December 31,
  
   
2011
    
2010
    
2009
  
   
(in millions)
  
Numerator:
                  
Net income (loss)
   $ (540.7 )   $ 7.5     $ 58.5  
Net interest expense on convertible notes and convertible preferred stock dividends (a)
  
 (b)
        -       0.1  
Net income (loss) if-converted
  $ (540.7 )   $ 7.5     $ 58.6  
                         
Denominator:
                        
Weighted average common shares
    122.5       114.7       112.9  
Less: Weighted average unvested restricted stock
     1.7       1.9       1.5  
Denominator for basic calculation
    120.8       112.8       111.4  
                         
Weighted average effect of dilutive securities:
                        
Stock compensation awards
    0.1       0.5       0.6  
Convertible notes
    44.5       48.1       48.1  
Convertible preferred stock (c)
    19.2       5.2        -  
Subtotal
    63.8       53.8       48.7  
Less: shares excluded in a period of a net loss (d)
     63.8        -        -  
Weighted average effect of dilutive securities
     -       53.8       48.7  
Denominator for diluted calculation
    120.8       166.6       160.1  
                         
Net income (loss) per share – basic
  $ (4.48 )   $ .07     $ .53  
Net income (loss) per share – diluted
  $ (4.48 )   $ .05     $ .37  
Schedule of Securities Excluded From Earnings Per Share
 
Years Ended December 31,
 
2011
2010
2009
Options excluded from diluted earnings per share
3.1
2.5
1.9
Warrants excluded from diluted earnings per share
6.3
2.1
-
Exercise price of excluded options
$3.72 to
$5.18 to
$5.00 to
 
$14.28
$14.28
$16.90
Exercise price of excluded warrants
$7.50
$7.50
-