Outstanding Loans and Leases and Allowance for Credit Losses - Credit Quality Indicators Narrative (Details) - USD ($) $ in Billions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Receivables [Abstract] | ||
| Commercial reservable criticized utilized exposure, amount | $ 22.1 | $ 24.7 |
| Commercial reservable criticized utilized exposure, percent | 2.89% | 3.37% |