Pension Plan and Employee Benefits - Target Portfolio Allocations (Details)	Dec. 31, 2024
Minimum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	80.00%
Minimum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	100.00%
Minimum | ≥ 115%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	115.00%
Maximum | ≤ 80%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	80.00%
Maximum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	100.00%
Maximum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	115.00%
RETURN-SEEKING | ≤ 80%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	60.00%
RETURN-SEEKING | ≥ 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	10.00%
RETURN-SEEKING | Minimum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	47.00%
RETURN-SEEKING | Minimum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	10.00%
RETURN-SEEKING | Maximum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	60.00%
RETURN-SEEKING | Maximum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	47.00%
LIABILITY-HEDGING CREDIT | ≤ 80%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
LIABILITY-HEDGING CREDIT | ≥ 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	83.00%
LIABILITY-HEDGING CREDIT | Minimum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
LIABILITY-HEDGING CREDIT | Minimum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	37.00%
LIABILITY-HEDGING CREDIT | Maximum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	37.00%
LIABILITY-HEDGING CREDIT | Maximum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	83.00%
LIABILITY-HEDGING GOVERNMENT | ≤ 80%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
LIABILITY-HEDGING GOVERNMENT | ≥ 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	7.00%
LIABILITY-HEDGING GOVERNMENT | Minimum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	16.00%
LIABILITY-HEDGING GOVERNMENT | Minimum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	7.00%
LIABILITY-HEDGING GOVERNMENT | Maximum | 80% to 100%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
LIABILITY-HEDGING GOVERNMENT | Maximum | 100% to 115%
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	16.00%