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INVESTMENTS - Equity Securities (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]        
Net investment gains (losses) recognized during the period on securities held at the end of the period $ (33) $ (48) $ (143) $ (8)
Net investment gains (losses) recognized on securities sold during the period 0 43 (11) 47
Unrealized and realized gains (losses) on equity securities $ (33) $ (5) $ (154) $ 39