Loan Sale and Servicing Activities and Variable Interest Entities (Principal Balance, Delinquent Loans (Loans 90 Days or More Past Due), and Net Charge-Offs Related to Serviced Loans) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Residential mortgage loans held for sale | |||
| Total principal balance | $ 36,521 | $ 36,088 | |
| Delinquent loans | 269 | 274 | |
| Net charge-offs | 1 | $ 1 | |
| Commercial mortgage loans held for sale | |||
| Total principal balance | 54,597 | 55,145 | |
| Delinquent loans | 200 | $ 216 | |
| Net charge-offs | $ 31 | $ 10 | |