Employee Benefits - Assumptions Used to Determine Net Periodic Benefit Cost (Income) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Salaried VEBA
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.10%	2.49%	2.05%
Expected long-term return on plan assets	5.75%	5.50%	5.50%
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.19%	2.90%	2.89%
Expected long-term return on plan assets	6.33%	6.02%	5.78%
Rate of compensation increase	2.63%	2.69%	2.74%
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.14%	2.64%	2.97%