Servicing of Financial Assets (Analysis Of Residential MSRs Under The Fair Value Measurement Method) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Servicing Asset at Fair Value, Amount [Roll Forward] | ||
| Carrying Value, beginning of period | $ 906 | |
| Carrying value, end of period | 1,026 | |
| Residential Mortgage [Member] | ||
| Servicing Asset at Fair Value, Amount [Roll Forward] | ||
| Carrying Value, beginning of period | 906 | $ 812 |
| Additions | 5 | 4 |
| Servicing Asset, at fair value, purchases | 125 | 10 |
| Increase (decrease) in fair value, due to change in valuation inputs or assumptions | 19 | (12) |
| Increase (decrease) in fair value, economic amortization associated with borrower repayments | (29) | (24) |
| Carrying value, end of period | $ 1,026 | $ 790 |