Investments - Carrying Amounts of Other Invested Assets (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Investments [Line Items] | ||
| Alternative investments | $ 3,048 | $ 3,456 |
| All other investments | 1,605 | 1,728 |
| Total | 6,841 | 6,696 |
| Accumulated depreciation on investment in real estate | 146 | 142 |
| Hedge Funds | ||
| Investments [Line Items] | ||
| Total | 134 | 175 |
| Private equity funds | ||
| Investments [Line Items] | ||
| Alternative investments | 2,757 | 3,090 |
| Total | 2,700 | 3,000 |
| Alternative equity security | ||
| Investments [Line Items] | ||
| All other investments | 254 | 300 |
| Corebridge Financial Inc | ||
| Investments [Line Items] | ||
| Equity method investments | 0 | 1,512 |
| Convex Group Limited | ||
| Investments [Line Items] | ||
| Equity method investments | $ 2,188 | $ 0 |
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- Definition Line items represent reporting 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. No definition available.
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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investments classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Includes other investments and securities that are not at fair value as of the balance sheet date and those that are not accounted for under the equity method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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