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Pension - Weighted Average Assumptions (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount Rate 2.47% 3.36%  
Rate of Compensation Increase 0.00% 0.00%  
Interest Credited Rate 2.26% 3.01%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount Rate 3.36% 4.37% 4.28%
Rate of Compensation Increase 0.00% 3.63% 4.05%
Interest Credited Rate 2.47% 3.39% 3.94%