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Capital Stock and Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Reconciliation of Weighted Average Shares for Basic and Diluted Shares Computations The following is a reconciliation of weighted average shares for the basic and diluted share computations (in millions):
    
For the Years Ended December 31,
  
    
2021
     
2020
     
2019
  
Weighted average shares outstanding for basic net earnings per share
      208.6        207.0        205.1  
Effect of dilutive stock options and other equity awards
      1.8        —          1.6  
  
 
 
     
 
 
     
 
 
  
Weighted average shares outstanding for diluted net earnings per share
      210.4        207.0        206.7