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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2019
Stock Options and Stock Appreciation Rights (SARs) [Member]  
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, 2019, 2018 and 2017:
 
2019
 
2018
 
2017
Grant date fair value of stock options and SARs
$
20.59

 
$
14.78

 
$
10.07

Expected stock price volatility
26.59
%
 
25.69
%
 
27.63
%
Risk-free interest rate
2.58
%
 
2.62
%
 
2.11
%
Expected annual dividend yield
1.08
%
 
1.34
%
 
1.87
%
Expected life of options & SARs (years)
5.6

 
5.7

 
5.8
Schedule of stock option and SAR activity
The following table illustrates the stock option and SAR activity for the year ended December 31, 2019:
 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Exercise
Price
Outstanding at December 31, 2018
2,851

 
$
47.67

 
 
 
 
Granted
860

 
$
78.78

Forfeited
(106
)
 
$
58.50

Exercised
(352
)
 
$
43.75

 
 
 
 
Outstanding at December 31, 2019
3,253

 
$
55.97

Exercisable at December 31, 2019
1,036

 
$
46.05

Stock options & SARs expected to vest
2,217

 
$
60.61
Restricted Stock Units (RSUs) and Performance Share Units (PSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of RSU and PSU activity
The following table illustrates the RSU and PSU activity for the year ended December 31, 2019:  
 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Grant-Date
Fair Value
Outstanding at December 31, 2018
187

 
$
43.46

 
 
 
 
Granted
38

 
$
78.64

Vested
(55
)
 
$
51.43

Forfeited
(1
)
 
$
43.68

 
 
 
 
Outstanding at December 31, 2019
169

 
$
48.94