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INVESTMENTS - Trading Securities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |  |  |
Net investment gains (losses) recognized during the period on securities held at the end of the period | $ (198) | $ (274) | $ 128
Net investment gains (losses) recognized on securities sold during the period | 0 | 248 | 42
Unrealized and realized gains (losses) on trading securities | (198) | (26) | 170
Interest and dividend income from trading securities | 29 | 99 | 217
Net investment income (loss) from trading securities | $ (169) | $ 73 | $ 387

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