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Earnings Per Share (EPS)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share (EPS) [Abstract]  
Earnings Per Share (EPS)

Note 7.  Earnings Per Share (EPS)


  
Year Ended December 31,
  
(in millions, except per share data)
  
2019
    
2018
    
2017
  
Net income attributable to MTI
  
$
132.7
    
$
169.0
    
$
195.1
  
                         
                         
Weighted average shares outstanding
    
35.0
      
35.3
      
35.2
  
Dilutive effect of stock options and stock units
    
0.1
      
0.3
      
0.4
  
Weighted average shares outstanding, adjusted
    
35.1
      
35.6
      
35.6
  
                         
Basic earnings per share attributable to MTI
  
$
3.79
    
$
4.79
    
$
5.54
  
                         
Diluted earnings per share attributable to MTI
  
$
3.78
    
$
4.75
    
$
5.48
  


Options to purchase 825,331 shares, 568,284 shares and 181,003 shares of common stock for the years ended December 31, 2019, 2018 and 2017, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.