v3.25.3
Mortgage Loans - Amortized Cost Basis of Held-for-Investment Loans on Nonaccrual (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual $ 16,371 $ 13,806 $ 16,371 $ 13,806 $ 16,277 $ 12,552
Interest Income Recognized 46 38 213 178    
Single family            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual 16,114 13,692 16,114 13,692 16,098 12,442
Interest Income Recognized 45 37 211 176    
20- and 30-year or more, amortizing fixed-rate            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual 15,430 12,985 15,430 12,985 15,376 11,773
Interest Income Recognized 43 35 204 167    
15-year or less, amortizing fixed-rate            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual 462 477 462 477 480 439
Interest Income Recognized 1 1 4 5    
Adjustable-rate and other            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual 222 230 222 230 242 230
Interest Income Recognized 1 1 3 4    
Multifamily            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Excluding Accrued Interest, Nonaccrual 257 114 257 114 $ 179 $ 110
Interest Income Recognized $ 1 $ 1 $ 2 $ 2