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Stock-based Compensation (Stock Awards Granted) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted 674,711 868,535 772,522
Restricted Stock Units Excluding Liability Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted 562,021 722,499 588,819
Performance Shares Excluding Liability Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted 112,690 146,036 102,776
Equity Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted 674,711 868,535 691,595
Liability Award [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted [1],[2] 0 0 80,927
Performance units (liability) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted     48,556
Restricted Stock Units Liability [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted     32,371
[1] Includes 32,371 restricted stock units in 2019.
[2] Includes 48,556 performance units in 2019.