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INVESTMENTS - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items] |  |
Aggregate market value of investments in unrealized loss position | $ 10,979 | $ 14,789
Gross unrealized losses on investments in unrealized loss position | 793 | 1,137
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation | 111 | 102
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation | 682 | 1,035
Additional contractual commitments | 2,900 |
Cash surrender value of life insurance | 1,400 | 1,300
Variable Interest Entity, Not Primary Beneficiary |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Maximum exposure to loss | 5,100 | 4,800
Commitments to fund investments | 2,100 |
Partnership Interest |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Maximum exposure to loss | $ 3,700 | $ 3,400
Investments, Debt Securities Benchmark | Issuer | Issuer One |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Percentage of overall fair value of fixed maturity securities available for sale, less than | 2.00% | 3.00%
Investments, Debt Securities Benchmark | Issuer | Issuer Two |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Percentage of overall fair value of fixed maturity securities available for sale, less than | 0.30% | 0.70%
Investment Grade |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation | $ 108 | $ 86
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation | 659 | 1,000
Fixed maturities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation |  | 102
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation | $ 682 | $ 1,000

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