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Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2024
Earnings per Share [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. 31,
2024
    
Apr. 2,
2023
  
Net income attributable to Minerals Technologies Inc.
  
$
46.7
    
$
37.0
  
                 
Weighted average shares outstanding
    
32.3
      
32.5
  
Dilutive effect of stock options and deferred restricted stock units
    
0.1
      
—
  
Weighted average shares outstanding, adjusted
    
32.4
      
32.5
  
                 
Basic earnings per share attributable to Minerals Technologies Inc.
  
$
1.45
    
$
1.14
  
                 
Diluted earnings per share attributable to Minerals Technologies Inc.
  
$
1.44
    
$
1.14