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Earnings per Share (EPS) (Tables)
 3 Months Ended
Mar. 29, 2020
Earnings per Share (EPS) [Abstract]  
Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:


  
Three Months Ended
  
(in millions, except per share data)
  
Mar. 29,
2020
    
Mar. 31,
2019
  
             
Net income attributable to Minerals Technologies Inc.
  
$
38.6
    
$
39.1
  
                 
Weighted average shares outstanding
    
34.4
      
35.2
  
Dilutive effect of stock options and stock units
    
—
      
0.1
  
Weighted average shares outstanding, adjusted
    
34.4
      
35.3
  
                 
Basic earnings per share attributable to Minerals Technologies Inc.
  
$
1.12
    
$
1.11
  
                 
Diluted earnings per share attributable to Minerals Technologies Inc.
  
$
1.12
    
$
1.11