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Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Net Investment Income [Line Items] |  |  |  |
Total investment income | $ 1,505 | $ 1,027 | $ 2,648 | $ 2,059
Investment expenses | 39 | 37 | 77 | 90
Net investment income | 1,466 | 990 | 2,571 | 1,969
Change in fair value of equity method investment | 464 | 59 | 681 | 147
Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 1,466 | 994 | 2,569 | 1,987
Investment expenses | 39 | 37 | 77 | 90
Net investment income | 1,427 | 957 | 2,492 | 1,897
Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 39 | 33 | 79 | 72
Investment expenses | 0 | 0 | 0 | 0
Net investment income | 39 | 33 | 79 | 72
Corebridge Financial Inc |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Dividend income | 27 | 68 | 58 | 68
Change in fair value of equity method investment | 455 | 65 | 664 | 65
Available for sale fixed maturity securities, including short-term investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 892 | 743 | 1,704 | 1,530
Available for sale fixed maturity securities, including short-term investments | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 876 | 723 | 1,666 | 1,488
Available for sale fixed maturity securities, including short-term investments | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 16 | 20 | 38 | 42
Other fixed maturity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 16 | 5 | 27 | 7
Other fixed maturity securities | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 0 | 1 | 0 | (4)
Other fixed maturity securities | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 16 | 4 | 27 | 11
Equity securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 14 | (4) | 23 | 84
Equity securities | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 14 | (4) | 23 | 84
Equity securities | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 0 | 0 | 0 | 0
Interest on mortgage and other loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 53 | 73 | 104 | 150
Interest on mortgage and other loans | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 46 | 65 | 90 | 133
Interest on mortgage and other loans | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 7 | 8 | 14 | 17
Alternative investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 48 | 32 | 91 | 86
Alternative investments | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 48 | 32 | 91 | 87
Alternative investments | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 0 | 0 | 0 | (1)
Other investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 482 | 178 | 699 | 202
Other investments | Excluding Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | 482 | 177 | 699 | 199
Other investments | Fortitude Re Funds Withheld Assets |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Total investment income | $ 0 | $ 1 | $ 0 | $ 3

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