Derivatives - Derivatives Associated with Cash Flow Hedges and Mortgage Banking Hedges (Details) - Hedging Instruments and Hedged Items: - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Interest Rate Contract | Cash Flow Hedge | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Variability in cash flows related to debt instruments (primarily loans) | $ 5,000 | $ 5,000 |
| Interest rate contracts | Cash Flow Hedge | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional | 5,000 | 5,000 |
| Assets | 5 | 0 |
| Liabilities | 38 | 14 |
| Option contracts written | Mortgage Banking Hedges | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional | 128 | 82 |
| Assets | 1 | 1 |
| Liabilities | 0 | 0 |
| Forward contracts written | Mortgage Banking Hedges | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional | 262 | 135 |
| Assets | 3 | 0 |
| Liabilities | $ 0 | $ 0 |
| X | ||||||||||
- Definition Held-to-maturity trust preferred loans. No definition available.
|
| X | ||||||||||
- Definition Fair value of all asset derivatives designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Fair value of all liability derivatives designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Nominal or face amount used to calculate payment on derivative. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|