Defined Benefit Pension Plans (Weighted-Average Assumptions Used) (Details)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
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	5.54%	3.00%
Equivalent single discount rate for service cost	5.60%	3.11%
Equivalent single discount rate for interest cost	5.43%	2.67%
Expected long-term return on plan assets	5.25%	5.25%
Rate of compensation increase	5.00%	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	5.50%	2.89%
Equivalent single discount rate for service cost	5.61%	3.16%
Equivalent single discount rate for interest cost	5.40%	2.48%
Rate of compensation increase	5.00%	3.75%