Pension and Other Post-Retirement Benefits - Assumed Health Care Cost Trend Rates (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Post Age 65	5.75%	5.46%
Medical Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Pre Age 65	6.40%	6.20%
Review of historical returns
Rate to which the cost trend is expected to decline (the ultimate trend rate)	4.50%	4.50%
Year that rate reaches the ultimate trend rate	2032	2029
Prescription Drugs Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Pre Age 65	7.50%	8.04%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Post Age 65	7.50%	8.04%
Review of historical returns
Rate to which the cost trend is expected to decline (the ultimate trend rate)	4.50%	4.50%
Year that rate reaches the ultimate trend rate	2031	2029
Medicare Advantage Part D
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Post Age 65	16.25%