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INVESTMENTS - Investment Gains (Losses), Net (Details) - USD ($) $ in Millions | 12 Months Ended
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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)

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