Investments (Securities Lending) (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Securities Financing Transaction [Line Items] | ||
| Cash collateral received from counterparties | $ 3,215 | $ 3,225 |
| Reinvestment portfolio — estimated fair value | 3,343 | 3,352 |
| Amortized cost | ||
| Securities Financing Transaction [Line Items] | ||
| Securities on loan | 3,593 | 3,550 |
| Estimated fair value | ||
| Securities Financing Transaction [Line Items] | ||
| Securities on loan | $ 3,126 | $ 3,141 |
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- Definition This element represents the estimated fair value of the securities lending reinvestment portfolio. No definition available.
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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. No definition available.
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- Definition Amount, after the effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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