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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2012
Earnings Per Share  
Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share

 

 
  For the Three
Months Ended
June 30,
  For the Six
Months Ended
June 30,
 
 
  2011   2012   2011   2012  

Numerator:

                         

Net income (controlling interest)

  $ 45.5   $ 6.6   $ 84.5   $ 44.0  
                   

Denominator:

                         

Average shares outstanding—basic

    52.1     51.4     51.9     51.5  

Effect of dilutive instruments:

                         

Stock options and other awards

    1.3     1.3     1.4     1.3  
                   

Average shares outstanding—diluted

    53.4     52.7     53.3     52.8  
                   
Diluted earnings per share calculations excluding the anti-dilutive effect of shares

 

 
  For the Three
Months Ended
June 30,
  For the Six
Months Ended
June 30,
 
 
  2011   2012   2011   2012  

Stock options and other awards

    0.6     1.2     0.6     1.2  

Senior convertible securities

    3.7     3.7     3.7     3.7  

Junior convertible trust preferred securities

    4.1     4.1     4.1     4.1