Investment Securities - Narrative (Details) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2026
USD ($)
|
Jun. 30, 2026
USD ($)
security
|
Jun. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
|
|
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] | ||||
| Proceeds from sales of available-for-sale securities | $ 1,490,000,000 | $ 5,428,000,000 | $ 7,521,000,000 | |
| Pre-tax gain | $ 0 | $ 1,000,000 | ||
| Percentage of investment portfolio considered investment grade | 99.00% | 99.00% | ||
| Unrealized loss | $ 4,350,000,000 | |||
| Number of securities in loss position | security | 1,487 | |||
| Asset pledged as collateral | ||||
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] | ||||
| Debt securities | $ 74,030,000,000.00 | $ 74,030,000,000.00 | $ 74,140,000,000 | |
| X | ||||||||||
- Definition Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity or available-for-sale where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity and available-for-sale investments determined to be temporarily impaired. No definition available.
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| X | ||||||||||
- Definition Percentage of Portfolio Considered Investment Grade No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of unrealized and realized gain (loss) 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/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- Details
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