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, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.75%	4.75%	4.75%
Pre-65 Retirees [Member]
Defined Benefit Plan, Health Care Cost Trend Rate, Net Periodic Pension and Other Postretirement Benefit Costs	5.65%	5.87%	6.13%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2032	2030	2027
Post - 65 Retirees [Member]
Defined Benefit Plan, Health Care Cost Trend Rate, Net Periodic Pension and Other Postretirement Benefit Costs	5.90%	6.31%	6.25%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2032	2028	2027
Other Postretirement Benefits Plan [Member] | Measurement Input Discount Rate Service Costs
Weighted-average discount rate	3.20%	2.98%	3.27%
Other Postretirement Benefits Plan [Member] | Measurement Input Discount Rate Interest Costs
Weighted-average discount rate	2.31%	1.86%	2.41%
Other Postretirement Benefits Plan [Member] | Taxable [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.75%	5.00%	5.25%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.75%	6.75%	7.00%
Pension Plans, Defined Benefit [Member] | Qualified Plan [Member] | Measurement Input Discount Rate Service Costs
Weighted-average discount rate	3.07%	2.81%	3.42%
Pension Plans, Defined Benefit [Member] | Qualified Plan [Member] | Measurement Input Discount Rate Interest Costs
Weighted-average discount rate	2.49%	2.08%	2.99%
Pension Plans, Defined Benefit [Member] | Nonqualified Plan [Member] | Measurement Input Discount Rate Service Costs
Weighted-average discount rate	4.94%	1.48%	2.71%
Pension Plans, Defined Benefit [Member] | Nonqualified Plan [Member] | Measurement Input Discount Rate Interest Costs
Weighted-average discount rate	5.03%	2.14%	2.25%
Minimum [Member]
Weighted-average rate of increase in future compensation levels	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	0.0575%	0.0006%	0.0625%
Minimum [Member] | Pension Plans, Defined Benefit [Member] | Qualified Plan [Member]
Weighted-average discount rate	0.00052%	2.99%
Maximum [Member]
Weighted-average rate of increase in future compensation levels	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	0.0675%	0.0675%	0.0725%
Maximum [Member] | Pension Plans, Defined Benefit [Member] | Qualified Plan [Member]
Weighted-average discount rate	0.00053%	3.08%