Benefit Plans (Actuarial Assumptions for Net Cost or Benefit) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.35%	3.15%	4.25%
Expected long term rate of return	6.75%	7.25%	7.50%
Interest crediting rate	3.00%	5.00%	5.00%
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.60%	2.30%	3.55%