Investment Securities - Additional Information (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Investments, Unrealized Loss Position | ||
| Accrued interest receivables on investment securities | $ 194 | $ 139 |
| Investment securities, fair value | 31,500 | 28,600 |
| Unrealized losses | 3,095 | 2,973 |
| Available-for-sale debt securities transferred to held-to-maturity securities | ||
| Investments, Unrealized Loss Position | ||
| AOCI offset, unamortized portion of unrealized losses on securities | 715 | 742 |
| Non-rated Securities | ||
| Investments, Unrealized Loss Position | ||
| Unrealized losses | $ 25 | $ 24 |
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- Definition AOCI, Debt Securities, Available-for-Sale, Transferred To Held To Maturity, Before Tax No definition available.
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- Definition Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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 Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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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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