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Net Investment Income and Investment Related Gains (Losses) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Net Investment Income [Line Items] |  |  |  |
Total net investment income | $ 1,024 | $ 375 | $ 2,396 | $ 1,020
Total investment related gains (losses), net | (128) | (12) | (160) | (32)
Available-for-sale fixed maturity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 604 | 177 | 1,265 | 501
Total investment related gains (losses), net | (100) | 13 | (125) | (47)
Equity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 17 | 4 | 38 | 4
Total investment related gains (losses), net | 23 | (10) | 47 | 33
Mortgage loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 190 | 80 | 428 | 222
Total investment related gains (losses), net | (22) | 1 | (28) | (9)
Private loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 24 | 0 | 25 | 0
Total investment related gains (losses), net | 0 | (12) | (3) | (12)
Real estate |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | (6) | 2 | 46 | 7
Real estate partnerships |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | (3) | 1 | 3 | 16
Investment funds |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 55 | 53 | 223 | 103
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 | 63 | 46 | 140 | 138
Other |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total net investment income | 74 | 12 | 216 | 29
Short-term investments and other invested assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment related gains (losses), net | $ (29) | $ (4) | $ (51) | $ 3

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