v3.26.1
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mortgage Loans [Abstract]    
Mortgage loans FVO held-for-investment $ 6,906 $ 7,005
Derivative Assets Net [Abstract]    
Derivative Asset 1,561 1,466
Other Assets [Abstract]    
Netting adjustments (3,077) (2,998)
Total other assets 6,294 6,421
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 5,971 5,841
Other liabilities    
Derivative liabilities, netting Adjustment (3,077) (2,998)
Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 200 200
Fair Value, Measurements, Recurring    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 2,912 3,316
Trading, at Fair Value:    
Trading securities, at fair value 73,027 82,096
Total investments in securities 75,939 85,412
Mortgage Loans [Abstract]    
Mortgage loans FVO held-for-investment 6,906 7,005
Derivative Assets Net [Abstract]    
Derivative assets, net 1,561 1,466
Other Assets [Abstract]    
Guarantee Assets 4,495 4,728
Derivative assets, net 1,561 1,466
All Other Assets 238 227
Netting adjustments (3,773) (3,874)
Total other assets 6,294 6,421
Total Assets carried at fair value on a recurring basis 89,139 98,838
Other liabilities    
Derivative liabilities at fair value 983 781
Derivative liabilities, netting Adjustment (3,995) (3,979)
Total liabilities carried at fair value on a recurring basis 7,143 6,817
Fair Value, Measurements, Recurring | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 5,971 5,841
Fair Value, Measurements, Recurring | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 189 195
Fair Value, Measurements, Recurring | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 11,227 10,932
Fair Value, Measurements, Recurring | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 61,800 71,164
Fair Value, Measurements, Recurring | Level 1    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 0 0
Trading, at Fair Value:    
Trading securities, at fair value 61,551 70,916
Total investments in securities 61,551 70,916
Mortgage Loans [Abstract]    
Mortgage loans FVO held-for-investment 0 0
Derivative Assets Net [Abstract]    
Derivative assets, net 31 5
Other Assets [Abstract]    
Guarantee Assets 0 0
Derivative assets, net 31 5
All Other Assets 0 0
Total other assets 31 5
Total Assets carried at fair value on a recurring basis 61,582 70,921
Other liabilities    
Derivative liabilities at fair value 3 0
Total liabilities carried at fair value on a recurring basis 3 0
Fair Value, Measurements, Recurring | Level 1 | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 0 0
Fair Value, Measurements, Recurring | Level 1 | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 0 0
Fair Value, Measurements, Recurring | Level 1 | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 0 0
Fair Value, Measurements, Recurring | Level 1 | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 61,551 70,916
Fair Value, Measurements, Recurring | Level 2    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 2,263 2,616
Trading, at Fair Value:    
Trading securities, at fair value 8,800 8,394
Total investments in securities 11,063 11,010
Mortgage Loans [Abstract]    
Mortgage loans FVO held-for-investment 6,190 5,587
Derivative Assets Net [Abstract]    
Derivative assets, net 5,243 5,261
Other Assets [Abstract]    
Guarantee Assets 0 0
Derivative assets, net 5,243 5,261
All Other Assets 0 0
Total other assets 5,243 5,261
Total Assets carried at fair value on a recurring basis 22,496 21,858
Other liabilities    
Derivative liabilities at fair value 4,879 4,708
Total liabilities carried at fair value on a recurring basis 10,937 10,641
Fair Value, Measurements, Recurring | Level 2 | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 5,936 5,808
Fair Value, Measurements, Recurring | Level 2 | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 122 125
Fair Value, Measurements, Recurring | Level 2 | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 8,551 8,146
Fair Value, Measurements, Recurring | Level 2 | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 249 248
Fair Value, Measurements, Recurring | Level 3    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 649 700
Trading, at Fair Value:    
Trading securities, at fair value 2,676 2,786
Total investments in securities 3,325 3,486
Mortgage Loans [Abstract]    
Mortgage loans FVO held-for-investment 716 1,418
Derivative Assets Net [Abstract]    
Derivative assets, net 60 74
Other Assets [Abstract]    
Guarantee Assets 4,495 4,728
Derivative assets, net 60 74
All Other Assets 238 227
Total other assets 4,793 5,029
Total Assets carried at fair value on a recurring basis 8,834 9,933
Other liabilities    
Derivative liabilities at fair value 96 52
Total liabilities carried at fair value on a recurring basis 198 155
Fair Value, Measurements, Recurring | Level 3 | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 35 33
Fair Value, Measurements, Recurring | Level 3 | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 67 70
Fair Value, Measurements, Recurring | Level 3 | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 2,676 2,786
Fair Value, Measurements, Recurring | Level 3 | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value $ 0 $ 0