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Investments - Schedule of Recognized Gains (Losses), net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Schedule of Investments [Line Items] |  |  |  |
Net realized gains (losses) on fixed maturity available-for-sale securities | $ 0 | $ 23 | $ (1) | $ 5
Net realized/unrealized gains on other invested assets | 73 | 13 | 73 | 71
Change in allowance for expected credit losses | (21) | (31) | (44) | (31)
Realized (losses) gains on certain derivative instruments | (52) | 14 | (77) | 35
Unrealized gains (losses) on certain derivative instruments | 192 | (55) | 34 | 103
Change in fair value of reinsurance related embedded derivatives | (61) | 10 | (102) | (8)
Change in fair value of other derivatives and embedded derivatives | 4 | 4 | 4 | 11
Net realized/unrealized gains (losses) on derivatives and embedded derivatives | 83 | (27) | (141) | 141
Recognized gains and losses, net | 98 | (88) | (189) | 187
Equity securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Net realized/unrealized (losses) gains on equity securities and (losses) gains on preferred securities | (36) | (62) | (73) | (10)
Valuation (losses) gains | (35) | (95) | (78) | (73)
Preferred securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Net realized/unrealized (losses) gains on equity securities and (losses) gains on preferred securities | (1) | (4) | (3) | 11
Valuation (losses) gains | $ (1) | $ (3) | $ (2) | $ 12

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