COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS - Schedule of Restricted Assets (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Collateralized Reinsurance And Trust Agreements [Abstract] | ||
| Collateral in trust for non-affiliated agreements | $ 3,347 | $ 3,363 |
| Collateral for secured letter of credit facilities | 662 | 739 |
| Collateral for FHLB borrowings | 1,357 | 1,418 |
| Securities on deposit with or regulated by government authorities | 1,398 | 1,417 |
| Funds at Lloyd's | 256 | 260 |
| Funds held by reinsureds | 1,395 | 1,326 |
| Total restricted assets | $ 8,414 | $ 8,522 |
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- Definition Collateralized Reinsurance And Trust Agreements[Abstract] No definition available.
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- Definition Funds Held In Financial Institution No definition available.
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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of securities on deposit with clearing organizations and other entities which provide services necessary to operations of the Company. This item would include, for instance, securities advanced as refundable collateral for securities borrowed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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