Retirement, Other Postretirement Benefits, And Defined Contribution Plans Actuarial Assumptions Used In Determining Net Periodic And Other Postretirement Benefit Obligation (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Net Periodic Pension and Other Postretirement Benefit Costs	4.75%	4.75%	4.75%
Pre Sixty Five Retirees [Member]
Defined Benefit Plan, Health Care Cost Trend Rate, Net Periodic Pension and Other Postretirement Benefit Costs	6.65%	5.65%	5.87%
Defined Benefit Plan, Year Health Care Trend Rate Reached and Beyond	2032	2032	2030
Post Sixty Five Retirees [Member]
Defined Benefit Plan, Health Care Cost Trend Rate, Net Periodic Pension and Other Postretirement Benefit Costs	7.50%	5.90%	6.31%
Defined Benefit Plan, Year Health Care Trend Rate Reached and Beyond	2032	2032	2028
Other Postretirement Benefits Plan [Member] | Measurement Input Discount Rate Service Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.00%	3.20%	2.98%
Other Postretirement Benefits Plan [Member] | Measurement Input Discount Rate Interest Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.09%	2.31%	1.86%
Other Postretirement Benefits Plan [Member] | Other Postretirement Taxable Assets [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets	5.25%	4.75%	5.00%
Pension Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets	7.00%	6.75%	6.75%
Pension Plan [Member] | Qualified Plan [Member] | Measurement Input Discount Rate Service Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.26%	3.07%	2.81%
Pension Plan [Member] | Qualified Plan [Member] | Measurement Input Discount Rate Interest Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.16%	2.49%	2.08%
Pension Plan [Member] | Nonqualified Plan [Member] | Measurement Input Discount Rate Service Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.31%	4.94%	1.48%
Pension Plan [Member] | Nonqualified Plan [Member] | Measurement Input Discount Rate Interest Costs [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.30%	5.03%	2.14%
Minimum [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	0.0398%	3.98%	3.98%
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Other Postretirement Non Taxable Assets [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets	0.06%	0.00058%	0.06%
Minimum [Member] | Pension Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	0.0005%	5.21%
Maximum [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	0.044%	4.40%	4.40%
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Other Postretirement Non Taxable Assets [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets	0.07%	0.0675%	0.0675%
Maximum [Member] | Pension Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	0.00051%	5.27%