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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per Share
The following is a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share available to common stockholders.
 
For the Three Months Ended March 31,
 
2015
 
2016
Numerator
 
 
 
Net income (controlling interest)
$
128.0

 
$
104.5

Convertible securities interest expense, net
3.8

 
3.8

Net income (controlling interest), as adjusted
$
131.8

 
$
108.3

Denominator
 
 
 
Average shares outstanding (basic)
54.8

 
54.0

Effect of dilutive instruments:
 
 
 
Stock options and restricted stock
0.8

 
0.3

Junior convertible securities
2.2

 
2.2

Average shares outstanding (diluted)
57.8

 
56.5

Schedule of Shares Excluded from Calculation of Basic and Diluted Earnings Per Share
The diluted earnings per share calculations in the table above exclude stock options and restricted stock units for which performance or market conditions were not met and the anti-dilutive effect of the following items:
 
For the Three Months Ended March 31,
 
2015
 
2016
Stock options and restricted stock units
0.1

 
0.7