Investments - Restricted Investments (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Assets Held by Insurance Regulators | $ 2,527 | $ 2,558 |
| Restricted Investments | 3,787 | 3,846 |
| Fair Value Measured at Net Asset Value Per Share [Member] | ||
| Schedule of Investments [Line Items] | ||
| Deposit Assets | 84 | 87 |
| Syndicate Policyholders [Member] | Debt Securities [Member] | ||
| Schedule of Investments [Line Items] | ||
| Debt Securities, Available-for-sale, Restricted | 1,167 | 1,178 |
| Syndicate Policyholders [Member] | Short-term investments | ||
| Schedule of Investments [Line Items] | ||
| Restricted Investments, Current | $ 9 | $ 23 |
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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, 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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- Definition This element represents the current portion of investments which are not defined as or included in marketable (debt, equity, or other) securities that are pledged or subject to withdrawal restrictions. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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