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COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS - Schedule of Premiums and Losses Ceded (Details) - Mt Logan Re - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Effects of Reinsurance [Line Items] |  |  |  |
Ceded written premiums | $ 82 | $ 46 | $ 169 | $ 99
Ceded earned premiums | 94 | 52 | 180 | 98
Ceded losses and LAE | 26 | 16 | 64 | 53
Assumed written premiums | 1 | 1 | 3 | 1
Assumed earned premiums | 1 | 1 | 3 | 1
Assumed losses and LAE | $ 0 | $ 0 | $ 0 | $ 0

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