Investments (Details) - Narrative - AFS Securities - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Investments, Debt and Equity Securities [Abstract] | ||
| AFS Securities - Accrued Interest | $ 110 | $ 105 |
| AFS Securities - Pledged as Collateral that may be Repledged | 511 | 501 |
| PurchaseOfInvestmentSecuritiesTradedButNotYetSettled | $ 318 | $ 0 |
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- Definition Purchase Of Investment Securities Traded,But Not Yet Settled No definition available.
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- Definition Amount, after allowance for credit loss, of accrued interest on 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 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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- References No definition available.
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