Defined Benefit Pension Plans (Weighted-Average Assumptions Used) (Details)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
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	4.51%	5.54%
Equivalent single discount rate for service cost		5.60%
Equivalent single discount rate for interest cost	4.51%	5.43%
Expected long-term return on plan assets	4.75%	5.25%
Rate of compensation increase	0.50%	5.00%
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	5.15%	5.50%
Equivalent single discount rate for service cost		5.61%
Equivalent single discount rate for interest cost	5.11%	5.40%
Rate of compensation increase		5.00%