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Stock-Based Compensation (Schedule of Assumptions Used) (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shareholder Value Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividend yield 2.50% 2.50% 2.50%
Risk-free interest rate 0.19% 1.38% 2.46%
Volatility 31.42% 20.90% 21.00%
Relative Value Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividend yield 2.50% 2.50%  
Risk-free interest rate 0.19% 1.38%  
Volatility 30.95% 19.89%