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Investments - Recognized Gains (Losses), net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Schedule of Investments [Line Items] |  |  |  |
Net realized gains (losses) on fixed maturity available-for-sale securities | $ 23 | $ (54) | $ 5 | $ (104)
Net realized/unrealized gains (losses) on other invested assets | 13 | (24) | 71 | (29)
Change in allowance for expected credit losses | (31) | (20) | (31) | (23)
Realized gains (losses) on certain derivative instruments | 14 | (65) | 35 | (154)
Unrealized (losses) gains on certain derivative instruments | (55) | 164 | 103 | 311
Change in fair value of other derivatives and embedded derivatives | 4 | 1 | 11 | 3
Realized (losses) gains on derivatives and embedded derivatives | (27) | 117 | 141 | 158
Recognized gains and losses, net | (88) | (16) | 187 | (11)
Reinsurance related embedded derivatives |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Change in fair value of reinsurance related embedded derivatives | 10 | 17 | (8) | (2)
Equity securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Net realized/unrealized gains on equity securities and (losses) gains n preferred securities | (62) | (37) | (10) | (5)
Valuation (losses) gains | (95) | (37) | (73) | 9
Preferred securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Net realized/unrealized gains on equity securities and (losses) gains n preferred securities | (4) | 2 | 11 | (8)
Valuation (losses) gains | $ (3) | $ 16 | $ 12 | $ 50

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