v3.25.2
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Mortgage Loans [Abstract]    
Held-for-sale, at fair value $ 3,867 $ 11,394
Mortgage loans FVO held-for-investment 4,424 2,413
Derivative Assets Net [Abstract]    
Derivative Asset 886 501
Other Assets [Abstract]    
Netting adjustments (3,234) (3,906)
Total other assets 6,166 5,870
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,693 2,339
Other liabilities    
Netting Adjustment (3,234) (3,906)
Total other liabilities 967 978
Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,500 2,000
Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 200 300
Fair Value, Measurements, Recurring    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 3,728 3,899
Trading, at Fair Value:    
Trading securities, at fair value 79,122 51,872
Total investments in securities 82,850 55,771
Mortgage Loans [Abstract]    
Held-for-sale, at fair value 3,867 11,394
Mortgage loans FVO held-for-investment 4,424 2,413
Derivative Assets Net [Abstract]    
Derivative assets, net 886 501
Other Assets [Abstract]    
Guarantee Assets 5,042 5,126
Derivative assets, net 886 501
All Other Assets 238 243
Netting adjustments (4,902) (5,989)
Total other assets 6,166 5,870
Total Assets carried at fair value on a recurring basis 97,307 75,448
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,693 2,339
Other liabilities    
Derivative liabilities, net 967 954
All other, at fair value   24
Netting Adjustment (4,696) (6,282)
Total other liabilities   978
Total liabilities carried at fair value on a recurring basis 3,660 3,317
Fair Value, Measurements, Recurring | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,476 2,013
Fair Value, Measurements, Recurring | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 217 326
Fair Value, Measurements, Recurring | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 10,196 9,158
Fair Value, Measurements, Recurring | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 68,926 42,714
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 68,572 42,289
Total investments in securities 68,572 42,289
Mortgage Loans [Abstract]    
Held-for-sale, at fair value 0 0
Mortgage loans FVO held-for-investment 0 0
Derivative Assets Net [Abstract]    
Derivative assets, net 1 9
Other Assets [Abstract]    
Guarantee Assets 0 0
Derivative assets, net 1 9
All Other Assets 0 0
Total other assets 1 9
Total Assets carried at fair value on a recurring basis 68,573 42,298
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 0 0
Other liabilities    
Derivative liabilities, net 0 0
All other, at fair value   0
Total other liabilities   0
Total liabilities carried at fair value on a recurring basis 0 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 68,572 42,289
Fair Value, Measurements, Recurring | Level 2    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 3,093 3,316
Trading, at Fair Value:    
Trading securities, at fair value 7,423 6,556
Total investments in securities 10,516 9,872
Mortgage Loans [Abstract]    
Held-for-sale, at fair value 3,867 10,099
Mortgage loans FVO held-for-investment 3,440 1,572
Derivative Assets Net [Abstract]    
Derivative assets, net 5,714 6,387
Other Assets [Abstract]    
Guarantee Assets 0 0
Derivative assets, net 5,714 6,387
All Other Assets 12 24
Total other assets 5,726 6,411
Total Assets carried at fair value on a recurring basis 23,549 27,954
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,591 2,237
Other liabilities    
Derivative liabilities, net 5,595 7,116
All other, at fair value   5
Total other liabilities   7,121
Total liabilities carried at fair value on a recurring basis 8,186 9,358
Fair Value, Measurements, Recurring | Level 2 | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 2,460 1,996
Fair Value, Measurements, Recurring | Level 2 | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 131 241
Fair Value, Measurements, Recurring | Level 2 | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 7,069 6,131
Fair Value, Measurements, Recurring | Level 2 | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 354 425
Fair Value, Measurements, Recurring | Level 3    
Available-For-Sale, at Fair Value:    
Debt Securities, Available-for-sale 635 583
Trading, at Fair Value:    
Trading securities, at fair value 3,127 3,027
Total investments in securities 3,762 3,610
Mortgage Loans [Abstract]    
Held-for-sale, at fair value 0 1,295
Mortgage loans FVO held-for-investment 984 841
Derivative Assets Net [Abstract]    
Derivative assets, net 73 94
Other Assets [Abstract]    
Guarantee Assets 5,042 5,126
Derivative assets, net 73 94
All Other Assets 226 219
Total other assets 5,341 5,439
Total Assets carried at fair value on a recurring basis 10,087 11,185
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 102 102
Other liabilities    
Derivative liabilities, net 68 120
All other, at fair value   19
Total other liabilities   139
Total liabilities carried at fair value on a recurring basis 170 241
Fair Value, Measurements, Recurring | Level 3 | Held by consolidated trusts    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 16 17
Fair Value, Measurements, Recurring | Level 3 | Held by Freddie Mac    
Liabilities, Fair Value Disclosure [Abstract]    
Debt instrument recorded at fair value 86 85
Fair Value, Measurements, Recurring | Level 3 | Mortage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value 3,127 3,027
Fair Value, Measurements, Recurring | Level 3 | Non-mortgage-related securities    
Trading, at Fair Value:    
Trading securities, at fair value $ 0 $ 0