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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Analysis of Changes in Number of Shares of Common Stock Outstanding
An analysis of changes in the number of shares of common stock outstanding follows:

TABLE 92: SHARES OF COMMON STOCK
202120202019
Balance at January 1208,289,178 209,709,046 219,012,050 
Incentive Plan and Awards1,162,484 1,512,035 1,688,931 
Stock Options Exercised837,757 344,686 786,931 
Treasury Stock Purchased(2,527,544)(3,276,589)(11,778,866)
Balance at December 31207,761,875 208,289,178 209,709,046