Segment Reporting - Schedule of Financing Receivables by Segment (Details) $ in Millions |
Mar. 31, 2026
USD ($)
employee
|
Dec. 31, 2025
USD ($)
employee
|
|---|---|---|
| Segment Reporting Information [Line Items] | ||
| Loans, net of deferred fees and costs | $ 85,197 | $ 39,154 |
| Deposits | $ 100,103 | $ 47,401 |
| Full-time equivalent employees | employee | 8,389 | 3,710 |
| Operating Segments | Banking | ||
| Segment Reporting Information [Line Items] | ||
| Loans, net of deferred fees and costs | $ 83,642 | $ 37,985 |
| Deposits | $ 88,433 | $ 42,339 |
| Full-time equivalent employees | employee | 4,879 | 2,367 |
| Operating Segments | Wealth | ||
| Segment Reporting Information [Line Items] | ||
| Loans, net of deferred fees and costs | $ 1 | $ 0 |
| Deposits | $ 2,477 | $ 1,160 |
| Full-time equivalent employees | employee | 565 | 250 |
| Treasury and Corporate Other | ||
| Segment Reporting Information [Line Items] | ||
| Loans, net of deferred fees and costs | $ 1,554 | $ 1,169 |
| Deposits | $ 9,193 | $ 3,902 |
| Full-time equivalent employees | employee | 2,945 | 1,093 |