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NET INVESTMENT INCOME AND INVESTMENT RELATED GAINS (LOSSES) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Net Investment Income [Line Items] |  |  |  |
Total net investment income | $ 1,118 | $ 444 | $ 1,692 | $ 840
Total investment related gains (losses) | (114) | 222 | (70) | 92
Available-for-sale fixed maturity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 552 | 216 | 865 | 420
Total investment related gains (losses) | (30) | (40) | (18) | (68)
Equity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 21 | 0 | 32 | 0
Total investment related gains (losses) | 28 | 245 | 48 | 156
Mortgage loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 172 | 76 | 255 | 149
Total investment related gains (losses) | (3) | (1) | (11) | (12)
Private loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 33 | 22 | 64 | 35
Total investment related gains (losses) | 1 | (3) | 5 | (3)
Investment real estate |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 38 | 12 | 43 | 27
Total investment related gains (losses) | 0 | 0 | (17) | 0
Real estate partnerships |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | (6) | 3 | (12) | 7
Total investment related gains (losses) | 0 | 0 | 0 | 0
Investment funds |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 144 | 45 | 187 | 64
Total investment related gains (losses) | 13 | 0 | 13 | 0
Policy loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 6 | 0 | 12 | 0
Short-term investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 61 | 70 | 112 | 138
Other invested assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 97 | 0 | 134 | 0
Short-term investments and other invested assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment related gains (losses) | $ (123) | $ 21 | $ (90) | $ 19

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