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INVESTMENTS - Schedule of Amortized Cost, Allowance for Credit Losses, Gross Unrealized Appreciation/(Depreciation) and Fair Value of Fixed Maturity Securities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Fixed maturity securities - available for sale |  |  |
Amortized Cost | $ 29,934 | $ 28,568 |
Allowance for Credit Losses | (36) | (48) | $ (54)
Unrealized Appreciation | 167 | 358 |
Unrealized Depreciation | (1,157) | (1,137) |
Fair Value | 28,908 | 27,740 |
Fixed maturity securities - held to maturity |  |  |
Amortized Cost | 765 | 864 |
Allowance for Credit Losses | (8) | (8) | (9)
Unrealized Appreciation | 14 | 12 |
Unrealized Depreciation | (12) | (13) |
Fair Value | 759 | 854 |
U.S. Treasury securities and obligations of U.S. government agencies and corporations |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 688 | 1,045 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 5 | 3 |
Unrealized Depreciation | (24) | (52) |
Fair Value | 669 | 996 |
Obligations of U.S. States and political subdivisions |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 75 | 138 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 0 | 1 |
Unrealized Depreciation | (5) | (11) |
Fair Value | 70 | 128 |
Corporate securities |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 7,288 | 7,587 |
Allowance for Credit Losses | (35) | (47) | (45)
Unrealized Appreciation | 57 | 135 |
Unrealized Depreciation | (299) | (322) |
Fair Value | 7,010 | 7,353 |
Fixed maturity securities - held to maturity |  |  |
Amortized Cost | 177 | 150 |
Allowance for Credit Losses | (2) | (2) | (2)
Unrealized Appreciation | 5 | 1 |
Unrealized Depreciation | (4) | (3) |
Fair Value | 175 | 146 |
Asset-backed securities |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 5,994 | 5,644 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 28 | 25 |
Unrealized Depreciation | (39) | (51) |
Fair Value | 5,982 | 5,618 |
Fixed maturity securities - held to maturity |  |  |
Amortized Cost | 484 | 609 |
Allowance for Credit Losses | (4) | (5) | (6)
Unrealized Appreciation | 5 | 4 |
Unrealized Depreciation | (8) | (10) |
Fair Value | 477 | 597 |
Commercial |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 965 | 1,091 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 1 | 1 |
Unrealized Depreciation | (66) | (92) |
Fair Value | 900 | 1,000 |
Fixed maturity securities - held to maturity |  |  |
Amortized Cost | 21 | 21 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 0 | 0 |
Unrealized Depreciation | 0 | 0 |
Fair Value | 21 | 21 |
Agency residential |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 5,205 | 4,869 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 13 | 55 |
Unrealized Depreciation | (287) | (229) |
Fair Value | 4,931 | 4,695 |
Non-agency residential |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 1,291 | 431 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 9 | 14 |
Unrealized Depreciation | (11) | (2) |
Fair Value | 1,289 | 443 |
Foreign government securities |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 2,330 | 2,042 |
Allowance for Credit Losses | 0 | 0 |
Unrealized Appreciation | 13 | 33 |
Unrealized Depreciation | (147) | (108) |
Fair Value | 2,196 | 1,967 |
Foreign corporate securities |  |  |
Fixed maturity securities - available for sale |  |  |
Amortized Cost | 6,099 | 5,720 |
Allowance for Credit Losses | 0 | (1) | (10)
Unrealized Appreciation | 42 | 92 |
Unrealized Depreciation | (279) | (271) |
Fair Value | 5,861 | 5,540 |
Fixed maturity securities - held to maturity |  |  |
Amortized Cost | 84 | 84 |
Allowance for Credit Losses | (1) | (1) | $ (1)
Unrealized Appreciation | 4 | 7 |
Unrealized Depreciation | 0 | 0 |
Fair Value | $ 86 | $ 90 |

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