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INVESTMENTS - Narrative (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
loan
security
Dec. 31, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
Net Investment Income [Line Items]      
Number of unrealized loss positions | security 845 119  
Debt securities exposure in single issuer greater than stated percentage of total investments 1.20%    
Fixed maturities available-for-sale, amortized cost $ 2,606,000,000 $ 2,444,000,000  
Unrealized loss on available for sale securities 0 0  
Gross unrealized losses $ 223,000,000 6,000,000  
Financing receivable, debt service ratio multiplier 2.0    
Financing receivable, allowance for credit loss, excluding accrued interest $ 0 $ 0  
Minimum      
Net Investment Income [Line Items]      
Financing receivable, loan to value ratio percentage 0.00% 0.00%  
Maximum      
Net Investment Income [Line Items]      
Financing receivable, loan to value ratio percentage 50.00% 50.00%  
Fixed maturities      
Net Investment Income [Line Items]      
Accrued investment income receivable $ 23,000,000 $ 20,000,000  
Accrued interest, written off 0 0 $ 0
Fixed maturities available-for-sale, amortized cost 2,600,000,000 2,400,000,000  
Corporate      
Net Investment Income [Line Items]      
Debt securities exposure in single issuer of total investments $ 24,000,000 $ 27,000,000  
Debt securities exposure in single issuer of total investments, percent 10.30% 3.80%  
Fixed maturities available-for-sale, amortized cost $ 2,417,000,000 $ 2,237,000,000  
Gross unrealized losses 200,000,000 6,000,000  
Commercial Mortgage Loans      
Net Investment Income [Line Items]      
Accrued investment income receivable $ 0 0  
Number of loans held | loan 2    
Accrued interest, written off $ 0 0 $ 0
Financing receivable, allowance for credit loss, excluding accrued interest 0 0  
Financing receivable, allowance for credit loss, excluding accrued interest, period increase (decrease) 0 0  
Commercial Mortgage Loans | Greater than 2.0x | 0% - 50%      
Net Investment Income [Line Items]      
Financing receivable, excluding accrued interest, before allowance for credit loss 17,000,000    
Individually Assessed Mortgage Loans      
Net Investment Income [Line Items]      
Financing receivable, allowance for credit loss, excluding accrued interest 0 0  
Mortgage loans foreclosure probable 0 0  
Other Than Investment Grade | External Credit Rating, Non Investment Grade | Fixed maturities      
Net Investment Income [Line Items]      
Available-for-sale securities, amortized cost $ 4,000,000 $ 10,000,000  
Percentage of available for sale securities 0.20% 0.40%