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Benefit Plans (Actuarial Assumptions for Benefit Obligations) (Details)
Dec. 31, 2021
Dec. 31, 2020
Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 2.75% 2.35%
Interest crediting rate 3.00% 3.00%
Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 2.25% 1.60%