Postretirement Benefits Other Than Pensions - Actuarial Assumptions of OPEB Expense (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Effective Rate for Interest on Service Cost	4.85%	5.04%	2.54%
Other Postretirement Benefit Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Weighted-average Discount Rate	4.92%	5.11%	2.56%
Service Cost Discount Rate	4.94%	5.12%	2.79%
Interest Cost Discount Rate	4.85%	5.03%	1.97%
Rate of Increase in Future Compensation Levels	2.20%	2.20%	2.20%