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Stock Compensation (Tables)
 12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Assumptions Used To Value Share-Based Compensation The assumptions used in the Black-Scholes single option pricing model are as follows.
 
Year Ended December 31
 
2019
 
2018
 
2017
Dividend yield
3%
 
3%
 
3%
Risk-free interest rate
2%
 
2%
 
2%
Stock volatility
22%
 
23%
 
25%
Average expected life (years)
6
 
6
 
6
Summary Of Option Activity During The Period
A summary of option activity during 2019 is presented below:
 
Shares
 
Weighted-Average
Exercise Price
 
(In thousands, except per share amounts)
Shares under option at December 31, 2018
9,061

 
$34.33
Granted
1

 
41.57
Exercised
(987
)
 
27.43
Forfeited or expired
(27
)
 
28.82
Shares under option at December 31, 2019
8,048

 
$35.20
 
 
 
 
Exercisable at December 31, 2019
6,769

 
$34.88
Summary Of Restricted Stock Awards And PSUs Activity During The Period
A summary of Restricted Stock Awards and PSUs activity during 2019 is presented below:
 
Restricted
Stock Awards and PSUs
 
Weighted Average
Grant-Date Fair Value
 
(In thousands, except per share amounts)
Non-vested at December 31, 2018
6,125

 
$40.82
Granted
2,569

 
42.11
Vested
(1,622
)
 
33.32
Forfeited
(350
)
 
43.10
Non-vested at December 31, 2019
6,722

 
$42.97