Financial Instruments Subject to Off-Balance Sheet Credit Risk - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Available for sale securities | $ 62,357 | $ 82,994 |
| Asset Pledged as Collateral | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Available for sale securities | 281 | 378 |
| Asset Pledged as Collateral | Interest rate swaps | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Available for sale securities | 281 | 378 |
| Securities Financing Transaction, Fair Value | ||
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] | ||
| Fair value of borrowed securities from other broker-dealers to fulfill short sales by clients | $ 4,600 | $ 674 |