v3.26.3
Fair Value Disclosures Fair Value Disclosures - Changes in Fair Value under the FVO option (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mortgage loans held-for-sale        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 0 $ 9 $ (2) $ 237
Mortgage loans held-for-investment        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) (245) (5) (342) 63
Debt | Held by Freddie Mac        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) 0 15 7 46
Debt | Held by consolidated trusts        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) 190 (7) 263 (59)
Other assets/other liabilities        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 0 $ 2 $ 0 $ 127