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SCHEDULE IV — REINSURANCE (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Gross Amount | $ 4,977 | $ 4,733 | $ 4,218
Ceded to Other Companies | 2,248 | 1,807 | 1,513
Assumed from Other Companies | 12,458 | 10,518 | 9,082
Net Amount | 15,187 | 13,443 | 11,787
Total property and liability insurance premiums earned |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Gross Amount | 4,977 | 4,733 | 4,218
Ceded to Other Companies | 2,248 | 1,807 | 1,513
Assumed from Other Companies | 12,458 | 10,518 | 9,082
Net Amount | $ 15,187 | $ 13,443 | $ 11,787
Assumed to Net | 82.00% | 78.20% | 77.10%

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