Quarterly report pursuant to Section 13 or 15(d)

Business, Basis of Presentation, and Accounting Policies - Additional Information (Details)

v3.22.1
Business, Basis of Presentation, and Accounting Policies - Additional Information (Details) - USD ($)
$ in Billions
Mar. 31, 2022
Dec. 31, 2021
Accounting Policies [Abstract]    
Account balance in trust for investors and escrow balances for mortgagors $ 1.0 $ 1.1