v3.26.1
Fair Value Disclosures Fair Value Disclosures - Changes in Fair Value under the FVO option (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mortgage loans held-for-sale        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ (2) $ 1 $ (2) $ 228
Mortgage loans held-for-investment        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) (73) 20 (97) 68
Debt | Held by Freddie Mac        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) 4 20 7 31
Debt | Held by consolidated trusts        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) 39 (5) 73 (53)
Other assets/other liabilities        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 0 $ 25 $ 0 $ 125