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FAIR VALUE - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value | $ 33,912,000,000 | $ 33,912,000,000 | $ 28,908,000,000
Transfer in and/or (out) of Level 3 | 0 | 0 |
Other invested assets | 1,348,000,000 | 1,348,000,000 | 1,171,000,000
Investments | Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Other invested assets | 242,000,000 | 242,000,000 | 239,000,000
Fixed maturities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value | $ 2,400,000,000 | $ 2,400,000,000 | $ 2,200,000,000

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