v3.25.4
Mortgage Loans - Loan Restructuring - Subsequent Default (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default $ 5,684 $ 5,188 $ 3,373
Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 3,102 3,337 2,018
Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 2,421 1,799 1,100
Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 161 52 255
Single-family      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 5,673 5,188 3,373
Single-family | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 3,102 3,337 2,018
Single-family | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 2,421 1,799 1,100
Single-family | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 150 52 255
Single-family | 20- and 30-year or more, amortizing fixed-rate      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 5,534 5,030 3,244
Single-family | 20- and 30-year or more, amortizing fixed-rate | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 2,997 3,209 1,933
Single-family | 20- and 30-year or more, amortizing fixed-rate | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 2,396 1,786 1,078
Single-family | 20- and 30-year or more, amortizing fixed-rate | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 141 35 233
Single-family | 15-year or less, amortizing fixed-rate      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 80 79 58
Single-family | 15-year or less, amortizing fixed-rate | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 69 79 57
Single-family | 15-year or less, amortizing fixed-rate | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 10 0 0
Single-family | 15-year or less, amortizing fixed-rate | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 1 0 1
Single-family | Adjustable-rate      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 9 15 7
Single-family | Adjustable-rate | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 8 12 5
Single-family | Adjustable-rate | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 0 0 0
Single-family | Adjustable-rate | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 1 3 2
Single-family | Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 50 64 64
Single-family | Other | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 28 37 23
Single-family | Other | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 15 13 22
Single-family | Other | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 7 14 19
Multifamily      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 11 0 0
Multifamily | Payment Deferral      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 0 0 0
Multifamily | Payment Delay and Term Extension      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default 0 0 0
Multifamily | Payment Delay, Term Extension, Interest Rate Reduction, and Other      
Loans in Mortgage Portfolio [Line Items]      
Restructured loans, subsequent default $ 11 $ 0 $ 0