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FAIR VALUE - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value | $ 30,479,000,000 | $ 30,479,000,000 | $ 27,740,000,000
Transfer in and/or (out) of Level 3 | 0 | 0 |
Other invested assets | 986,000,000 | 986,000,000 | 941,000,000
Investments | Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Other invested assets | 259,000,000 | 259,000,000 | 274,000,000
Fixed maturities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value | $ 2,100,000,000 | $ 2,100,000,000 | $ 2,000,000,000.0

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