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INVESTMENTS - Schedule of Components of Net Gains (Losses) on Investments (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items] |  |  |
Total net gains (losses) on investments | $ 19 | $ (276) | $ (455)
Fixed maturity securities |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Allowance for credit losses | 13 | 7 | (33)
Fixed maturity securities | Market Value |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Net realized gains (losses) from dispositions | 6 | (292) | (87)
Equity method investments | Market Value |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Net realized gains (losses) from dispositions | 1 | 8 | 112
Equity method investments | Fair Value |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Gains (losses) from fair value adjustments | (1) | 0 | (460)
Other invested assets |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Net realized gains (losses) from dispositions | (1) | 0 | 13
Short-term investments gain (loss) |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |
Net realized gains (losses) from dispositions | $ 1 | $ 0 | $ 0

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