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Share-Based Compensation (Narrative) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2017
Performance Share Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Comparison period of peer companies for performance awards 3 years  
Minimum [Member] | Restricted Stock Awards And Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting period 1 year  
Minimum [Member] | Performance Share Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Percentage of vesting units to units granted 0.00%  
Maximum [Member] | Restricted Stock Awards And Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting period 4 years  
Maximum [Member] | Performance Share Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Percentage of vesting units to units granted 200.00%  
2017 Plan [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Shares authorized for issuance   33,500,000
Number of shares used to calculate shares that may be granted under the Long-Term Incentive Plan, options and stock appreciation rights   1
Number of shares used to calculate shares that may be granted under the Long-Term Incentive Plan, other awards   2.3