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 | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Residential mortgage loans held for sale | ||||
| Total principal balance | $ 36,789 | $ 36,789 | $ 37,619 | |
| Delinquent loans | 274 | 274 | 288 | |
| Net charge-offs | 0 | 1 | $ 1 | |
| Commercial mortgage loans held for sale | ||||
| Total principal balance | 53,935 | 53,935 | 51,274 | |
| Delinquent loans | 290 | 290 | $ 124 | |
| Net charge-offs | $ (1) | $ 9 | $ 61 | |