Quarterly report pursuant to Section 13 or 15(d)

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Narrative (Details)

v3.21.1
MORTGAGE LOAN SALES AND SERVICING RIGHTS - Narrative (Details) - Residential Mortgage - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]      
Servicing income $ 18 $ 17  
Unpaid principal balance of third party serviced loans $ 23,600   $ 23,500