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INVESTMENTS - Restricted Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Restricted Investments [Line Items] |  |
Collateral in trust for inter-company agreements | $ 2,549,220 | $ 614,089
Collateral for secured letter of credit facility | 208,090 | 423,522
Funds at Lloyd's | 883,362 | 893,177
Collateral in trust for third-party agreements | 2,602,306 | 2,597,633
Securities on deposit or in trust with regulatory authorities | 632,268 | 772,472
Total restricted investments and cash | 6,875,246 | 5,300,893
AXIS Specialty Insurance Bermuda |  |
Restricted Investments [Line Items] |  |
Collateral assets held in trust | 2,000,000 |
Syndicate 1686 | Fixed maturities |  |
Restricted Investments [Line Items] |  |
Collateral in trust for third-party agreements | 572,000 | 550,000
Syndicate 1686 | Cash |  |
Restricted Investments [Line Items] |  |
Collateral in trust for third-party agreements | $ 237,000 | $ 296,000

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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for inter-company insurance and reinsurance agreements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References No definition available. + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for insurance and reinsurance agreements with third parties, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References No definition available. + Details
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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 825 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147477351/944-825-50-1A + Details
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