Employee Benefits - Assumptions Used to Determine Benefit Obligation (Details)	Dec. 31, 2023	Dec. 31, 2022
Salaried VEBA
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.89%	5.10%
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.95%	5.16%
Rate of compensation increase	2.63%	2.69%
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.92%	5.14%