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EMPLOYEE BENEFIT PLANS - Asset Allocations (Details) - Pension Benefits
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 100.00% 100.00%
Fixed maturities    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 49.30% 46.40%
Equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 24.10% 21.40%
Equity real estate    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 19.60% 22.60%
Cash and short-term investments    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 1.90% 4.00%
Other    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, actual plan asset allocation percentage 5.10% 5.60%