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FAIR VALUE - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | $ 27,740,000,000 | $ 22,236,000,000
Transfer in and/or (out) of Level 3 | 0 | 779,000,000
Other assets | 941,000,000 | 930,000,000
Fixed maturity securities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 2,000,000,000 | 1,700,000,000
Fair Value | Investments |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other assets | $ 274,000,000 | $ 292,000,000

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