Retirement Plans and Other Employee Benefits - Schedule of Assumptions Used in the Defined Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	5.40%	4.84%	5.04%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.84%	4.88%	2.42%
Other Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	5.74%	5.06%	5.25%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	5.49%	5.25%	5.08%
Qualified pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	5.00%	5.15%	2.85%
Qualified pension | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	5.66%	5.00%	5.20%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	5.00%	5.20%	2.96%
Nonqualified pension | Postretirement benefit (retirees post January 1, 1993)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	5.25%	5.50%	5.95%
Nonqualified pension | Postretirement benefit (retirees prior to January 1, 1993)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets			1.05%
Nonqualified pension | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	5.50%	4.90%	5.10%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.90%	5.10%	2.65%
Nonqualified pension | Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assumptions used calculating benefit obligation, discount rate	5.20%	4.75%	4.94%
Defined benefit plan assumptions used calculating net periodic benefit cost, discount rate	4.75%	4.94%	1.99%