Securities - Narrative (Details) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Gross realized losses | $ 0 | $ 0 | |
| Gross realized gains | 0 | $ 0 | |
| Securities pledged to secure securities sold under repurchase agreements | $ 18,500,000,000 | $ 18,700,000,000 | |