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INVESTMENTS - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
Debt Securities, Available-for-Sale [Line Items]      
Reclassification of specific investments from fixed maturity securities, available for sale at fair value to fixed maturity securities, held to maturity at amortized cost net of credit allowances $ 0 $ 0 $ 722
Unrealized loss from transfer 34    
Aggregate market value of investments in unrealized loss position 18,332 14,789  
Gross unrealized losses on investments in unrealized loss position 1,157 1,137  
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation 324 102  
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation 833 1,035  
Additional contractual commitments 3,300    
Other invested assets $ 1,700 $ 1,300  
Number of securities held as primary beneficiary | security 0 0  
Securities, carrying value $ 1,400    
Variable Interest Entity, Not Primary Beneficiary      
Debt Securities, Available-for-Sale [Line Items]      
Maximum exposure to loss 5,400 $ 4,800  
Commitments to fund investments 2,000    
Partnership Interest      
Debt Securities, Available-for-Sale [Line Items]      
Maximum exposure to loss $ 3,600 $ 3,400  
Investments, Debt Securities Benchmark | Issuer Concentration Risk | Issuer One      
Debt Securities, Available-for-Sale [Line Items]      
Percentage threshold of unrealized losses not exceeded by any one single issuer 1.60% 3.00%  
Investments, Debt Securities Benchmark | Issuer Concentration Risk | Issuer Two      
Debt Securities, Available-for-Sale [Line Items]      
Percentage threshold of unrealized losses not exceeded by any one single issuer 0.90% 0.70%  
Fixed maturity securities      
Debt Securities, Available-for-Sale [Line Items]      
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation   $ 102  
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation $ 833 1,000  
Investment Grade      
Debt Securities, Available-for-Sale [Line Items]      
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation 319 86  
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation $ 810 $ 1,000