Investment Securities - Additional Information (Details) - USD ($) |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Debt Securities, Available-for-sale [Line Items] | ||||
| Accrued interest receivable | $ 306,000,000 | $ 327,000,000 | ||
| Proceeds from sales | $ 68,000,000 | $ 0 | ||
| Investment securities | 39,400,000,000 | 39,700,000,000 | 39,400,000,000 | |
| Securities received as collateral | $ 1,000,000 | $ 1,000,000 | $ 1,000,000 | |
| Investment securities available for sale | Government Contracts Concentration Risk | US Treasury and Agency securities | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| Percentage of portfolio | 96.00% | 97.00% | ||
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest income on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), from change in present value of expected cash flows, attributable to passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash inflow from sale of 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 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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- Definition The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value of liabilities arising from or related to a financial instrument held by the entity for its own account (proprietary securities) which has been pledged to counterparties. No definition available.
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