Debt Securities (Narrative) (Details) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2025
USD ($)
|
Jun. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
security
|
Dec. 31, 2024
USD ($)
security
|
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| Debt Securities, Available-for-sale [Line Items] | ||||
| Debt Securities Transferred from Available for Sale to Held to Maturity, Amortized Cost | $ 2,000 | $ 1,000 | ||
| Debt securities available for sale | $ 27,560 | $ 26,224 | ||
| Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 1,058 | 1,564 | ||
| Unrealized gains (losses) on securities available for sale: | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityArisingDuringBeforeTax | $ 74 | $ 153 | $ 227 | $ 754 |
| Asset Pledged as Collateral | ||||
| Debt Securities, Available-for-sale [Line Items] | ||||
| Debt securities available for sale | $ 20,900 | $ 20,900 | ||
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- Definition Debt Securities Transferred from Available for Sale to Held to Maturity, Amortized Cost No definition available.
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- Definition OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityArisingDuringBeforeTax No definition available.
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- Definition Amount 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/2009/role/commonPracticeRef
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- Definition Number of investments in debt securities 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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