Defined Benefit Pension Plans (Weighted-Average Assumptions Used) (Details)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Qualified Pension Plan [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Equivalent single discount rate for benefit obligations	3.00%	2.71%
Equivalent single discount rate for service cost	3.11%	2.86%
Equivalent single discount rate for interest cost	2.67%	2.16%
Expected long-term return on plan assets	5.25%	5.75%
Rate of compensation increase	3.75%	3.75%
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Equivalent single discount rate for benefit obligations	2.89%	2.51%
Equivalent single discount rate for service cost	3.16%	2.94%
Equivalent single discount rate for interest cost	2.48%	1.97%
Rate of compensation increase	3.75%	3.75%