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INVESTMENTS - Investment Gains (Losses), Net (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net Investment Income [Line Items]      
Investment gains (losses), net $ (945) $ 868 $ 744
Fixed maturities      
Net Investment Income [Line Items]      
Investment gains (losses), net (868) 847 828
Mortgage loans on real estate      
Net Investment Income [Line Items]      
Investment gains (losses), net (66) 19 (45)
Other equity investments      
Net Investment Income [Line Items]      
Investment gains (losses), net 0 0 30
Other investment income      
Net Investment Income [Line Items]      
Investment gains (losses), net $ (11) $ 2 $ (69)