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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2023
Stock Options and Stock Appreciation Rights (SARs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Valuation Assumptions
The following table illustrates the assumptions used in estimating fair value in the years ended December 31, 2023, 2022 and 2021:

202320222021
Grant date fair value of stock options and SARs$40.18 $49.88 $42.47 
Expected stock price volatility41.84 %38.45 %39.27 %
Risk-free interest rate4.14 %1.68 %0.81 %
Expected annual dividend yield0.82 %0.56 %0.64 %
Expected life of options & SARs (years)5.45.45.5
Schedule of Stock Option and SAR Activity
The following table illustrates the stock option and SAR activity for the year ended December 31, 2023:

Number
of
Shares
(in 000’s)
Weighted-
Average
Exercise
Price
Outstanding at December 31, 20223,701 $92.98 
Granted564 $97.77 
Forfeited(241)$118.06 
Exercised(260)$67.30 
Outstanding at December 31, 20233,764 $93.82 
Exercisable at December 31, 20232,097 $77.53 
Stock options & SARs expected to vest 1,667 $114.32 
Restricted Stock Units (RSUs) and Performance Share Units (PSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of PSU and RSU Activity
The following table illustrates the RSU and PSU activity for the year ended December 31, 2023:  

Number
of
Shares
(in 000’s)
Weighted-
Average
Grant-Date
Fair Value
Outstanding at December 31, 202246 $117.91 
Granted53 $127.59 
Vested(22)$108.69 
Forfeited(10)$113.87 
Outstanding at December 31, 202367 $129.32