Quarterly report pursuant to Section 13 or 15(d)

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Residential Mortgage Portfolio, MSRs Fair Value Method Key Assumptions (Details)

v3.21.2
MORTGAGE LOAN SALES AND SERVICING RIGHTS - Residential Mortgage Portfolio, MSRs Fair Value Method Key Assumptions (Details) - Fair value method - Residential Mortgage - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]    
Constant prepayment rate (annualized), actual 12.21% 17.36%
Constant prepayment rate (annualized), 10% adverse change $ (16) $ (12)
Constant prepayment rate (annualized), 20% adverse change $ (30) $ (23)
Spread over forward interest rate swap rates, actual 5.45% 5.19%
Spread over forward interest rate swap rates, 10% adverse change $ (7) $ (4)
Spread over forward interest rate swap rates, 20% adverse change $ (14) $ (8)