Servicing of Financial Assets (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Servicing Assets at Fair Value [Line Items] | ||||
| Residential mortgage servicing rights at fair value | $ 812 | $ 418 | ||
| Residential Mortgage [Member] | ||||
| Servicing Assets at Fair Value [Line Items] | ||||
| Servicing related fees and other ancillary income | 137 | 102 | $ 95 | |
| Residential mortgage servicing rights at fair value | 812 | 418 | 296 | $ 345 |
| Fannie Mae DUS License [Member] | ||||
| Servicing Assets at Fair Value [Line Items] | ||||
| Servicing Asset at Amortized Cost | 81 | 86 | 74 | |
| Residential mortgage servicing rights at fair value | 96 | 96 | 81 | |
| Commercial Real Estate [Member] | ||||
| Servicing Assets at Fair Value [Line Items] | ||||
| Servicing related fees and other ancillary income | $ 24 | $ 25 | $ 19 | |