Securities - Narrative (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | |||||
| Gross realized gains | $ 0 | $ 0 | |||
| Gross realized losses | $ 0 | $ 0 | |||
| Securities pledged to secure securities sold under repurchase agreements | $ 18,000,000,000.0 | $ 18,000,000,000.0 | $ 18,700,000,000 | ||