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Investments - Carrying Amounts of Other Invested Assets (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Jun. 30, 2024 | Jun. 09, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Investments [Line Items] |  |  |  |
Alternative investments | $ 4,032 |  |  | $ 4,345
All other investments | 1,986 |  |  | 2,023
Total | 9,828 |  |  | 6,368
Accumulated depreciation on investment in real estate | 161 |  |  | 161
Hedge Funds |  |  |  |
Investments [Line Items] |  |  |  |
Total | 187 |  |  | 411
Private equity funds |  |  |  |
Investments [Line Items] |  |  |  |
Alternative investments | 3,105 |  |  | 3,388
Total | 3,600 |  |  | 3,700
Corebridge Financial Inc |  |  |  |
Investments [Line Items] |  |  |  |
Retained investment in Corebridge using fair value option | $ 3,810 |  | $ 12,409 | $ 0
Total |  | $ 817 |  |

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