Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.21.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Oct. 20, 2020
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies [Line Items]        
Total commitments to originate loans     $ 5,200.0 $ 1,500.0
Total commitments related to derivatives     $ 5,500.0 $ 2,000.0
Settlement agreement, date October 20, 2020      
Litigation settlement amount $ 24.9      
Litigation settlement amount received   $ 1.9    
U.S. Department of Housing and Urban Development (HUD)        
Commitments and Contingencies [Line Items]        
Complaint filing date     May 18, 2016