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MARKET RISK BENEFITS - Changes in the Market Risk Benefits for Deferred Variable Annuities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Market Risk Benefit [Roll Forward]        
Changes in the instrument-specific credit risk       $ 23,784
Individual Retirement | GMxB Core        
Market Risk Benefit [Roll Forward]        
Balance, beginning of the period $ 530 $ 1,061 $ 2,143  
Balance BOP before changes in the instrument specific credit risk 529 666 1,639  
Model changes and effect of changes in cash flow assumptions 20 (5) (280)  
Actual market movement effect (481) 1,074 (665)  
Interest accrual 73 37 7  
Attributed fees accrued 407 399 386  
Benefit payments (47) (37) (14)  
Actual policyholder behavior different from expected behavior 23 24 (9)  
Changes in future economic assumptions (203) (1,626) (397)  
Issuances 1 (3) (1)  
Balance EOP before changes in the instrument-specific credit risk 322 529 666  
Changes in the instrument-specific credit risk 268 1 395  
Balance, end of the period $ 590 $ 530 $ 1,061  
Weighted-average age of policyholders (years) 64 years 4 months 24 days 63 years 6 months 62 years 7 months 6 days  
Net amount at risk $ 2,995 $ 3,530 $ 1,115  
Legacy | GMxB Legacy        
Market Risk Benefit [Roll Forward]        
Balance, beginning of the period 14,699 20,236 24,405  
Balance BOP before changes in the instrument specific credit risk 15,314 19,719 23,944  
Model changes and effect of changes in cash flow assumptions (11) 317 (196)  
Actual market movement effect (1,847) 3,402 (3,026)  
Interest accrual 770 731 197  
Attributed fees accrued 843 882 918  
Benefit payments (1,354) (1,179) (902)  
Actual policyholder behavior different from expected behavior (14) 142 135  
Changes in future economic assumptions (673) (8,700) (1,351)  
Issuances 0 0 0  
Balance EOP before changes in the instrument-specific credit risk 13,028 15,314 19,719  
Changes in the instrument-specific credit risk 390 (615) 517  
Balance, end of the period $ 13,418 $ 14,699 $ 20,236  
Weighted-average age of policyholders (years) 73 years 72 years 6 months 71 years 10 months 24 days  
Net amount at risk $ 21,136 $ 22,631 $ 15,901  
Legacy | Purchased MRB        
Market Risk Benefit [Roll Forward]        
Balance, beginning of the period (10,415) (14,059) (2,763)  
Balance BOP before changes in the instrument specific credit risk (10,358) (14,051) (2,766)  
Model changes and effect of changes in cash flow assumptions (33) (143) 36  
Actual market movement effect 986 (1,226) 799  
Interest accrual (555) (489) (122)  
Attributed fees accrued (284) (295) (194)  
Benefit payments 768 669 350  
Actual policyholder behavior different from expected behavior (41) (102) (56)  
Changes in future economic assumptions 130 5,279 (950)  
Issuances 0 0 (11,148)  
Balance EOP before changes in the instrument-specific credit risk (9,387) (10,358) (14,051)  
Changes in the instrument-specific credit risk (33) (57) (8)  
Balance, end of the period $ (9,420) $ (10,415) $ (14,059)  
Weighted-average age of policyholders (years) 72 years 7 months 6 days 72 years 1 month 6 days 71 years 6 months  
Net amount at risk $ 11,343 $ 11,755 $ 9,055  
Legacy | Net Legacy        
Market Risk Benefit [Roll Forward]        
Balance, beginning of the period 4,284 6,177 21,642  
Balance BOP before changes in the instrument specific credit risk 4,956 5,668 21,178  
Model changes and effect of changes in cash flow assumptions (44) 174 (160)  
Actual market movement effect (861) 2,176 (2,227)  
Interest accrual 215 242 75  
Attributed fees accrued 559 587 724  
Benefit payments (586) (510) (552)  
Actual policyholder behavior different from expected behavior (55) 40 79  
Changes in future economic assumptions (543) (3,421) (2,301)  
Issuances 0 0 (11,148)  
Balance EOP before changes in the instrument-specific credit risk 3,641 4,956 5,668  
Changes in the instrument-specific credit risk 357 (672) 509  
Balance, end of the period $ 3,998 $ 4,284 $ 6,177