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INVESTMENTS - Summary of Components of Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Total net gains (losses) on investments | $ 5 | $ (236) | $ 10 | $ (390)
Fixed maturities | Market Value |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Allowance for credit losses | 0 | (1) | (8) | (13)
Net gains (losses on investments | (3) | (16) | (1) | (13)
Equity securities | Fair Value |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Net gains (losses on investments | 0 | (31) | 7 | (43)
Gains (losses) from fair value adjustments | 8 | (189) | 12 | (326)
Other invested assets |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |
Net gains (losses on investments | $ 0 | $ 1 | $ 0 | $ 5

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