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FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Fair Value Inputs Assets Quantitative Information [Line Items]      
Change in purchased market risk benefit asset fair value $ 544   $ 687
AFS fixed maturities transferred from Level 3 to Level 2 141 $ 495  
AFS fixed maturities transferred from Level 2 to Level 3 $ 136 $ 118  
Percentage of total equity representing AFS fixed maturities transferred 8.20% 11.70%  
Nonrecurring | Level 3      
Fair Value Inputs Assets Quantitative Information [Line Items]      
Investments, fair value $ 1,400   $ 1,100