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v3.25.3

Reinsurance - Summary of the Composition of Pool of Assets (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Effects of Reinsurance [Line Items] |  |
Fixed maturity securities - available for sale | $ 71,184 | $ 64,006
Fixed maturity securities - fair value option | 743 | 745
Short-term investments | 9,417 | 14,462
Other | 4,602 | 4,735
Total assets | 163,415 | 161,322
Carrying Value |  |
Effects of Reinsurance [Line Items] |  |
Short-term investments | 4,557 | 4,673
Other | 2 | 15
Commercial mortgage loans |  |
Effects of Reinsurance [Line Items] |  |
Loans, carrying value | 2,869 | 3,305
Fortitude Holdings |  |
Effects of Reinsurance [Line Items] |  |
Change in net unrealized gains (losses), gross | 58 | (35)
Change in net unrealized gains (losses), net of tax | 46 | (28)
Derivative asset, Fair value of collateral | 1 | 9
Derivative liability, Fair value of collateral | 31 | 2
Fortitude Holdings | Carrying Value |  |
Effects of Reinsurance [Line Items] |  |
Fixed maturity securities - available for sale | 1,787 | 1,918
Fixed maturity securities - fair value option | 736 | 721
Short-term investments | 19 | 15
Funds withheld investment assets | 2,972 | 3,104
Derivative assets, net | 0 | 1
Other | 133 | 115
Total assets | 3,105 | 3,220
Fortitude Holdings | Estimated Fair Value |  |
Effects of Reinsurance [Line Items] |  |
Fixed maturity securities - available for sale | 1,787 | 1,918
Fixed maturity securities - fair value option | 736 | 721
Short-term investments | 19 | 15
Funds withheld investment assets | 2,961 | 3,091
Derivative assets, net | 0 | 1
Other, fair value | 133 | 115
Total | 3,094 | 3,207
Fortitude Holdings | Commercial mortgage loans | Carrying Value |  |
Effects of Reinsurance [Line Items] |  |
Loans, carrying value | 430 | 450
Fortitude Holdings | Commercial mortgage loans | Estimated Fair Value |  |
Effects of Reinsurance [Line Items] |  |
Loans, fair value | $ 419 | $ 437

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