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INVESTMENTS - Summary of Gross Gains (Losses) from Sales of Fixed Maturity and Equity Securities (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Debt Securities, Available-for-Sale [Line Items] |  |
Proceeds from sales of fixed maturity securities - available for sale | $ 72 | $ 419
Gross gains from dispositions | 11 | 20
Gross losses from dispositions | (9) | (17)
Proceeds from sales of equity securities | 46 | 90
Equity securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Proceeds from sales of equity securities | 46 | 90
Gross gains from dispositions | 7 | 4
Gross losses from dispositions | $ 0 | $ (15)

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