v3.26.1
Consolidations and Transfers of Financial Assets - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Variable Interest Entities [Line Items]    
Total Assets $ 4,332,343 $ 4,317,538
Total UPB of mortgage loans 4,100,111 4,095,866
Multifamily    
Variable Interest Entities [Line Items]    
Total UPB of mortgage loans 534,915 524,962
Multifamily | Unconsolidated VIEs    
Variable Interest Entities [Line Items]    
Total UPB of mortgage loans 534,900  
Securitization and resecuritization trusts | Unconsolidated VIEs    
Variable Interest Entities [Line Items]    
Total Assets 474,900 535,491
Maximum Exposure to Loss 186,613 199,010
Net carrying amount 15,600 14,100
Credit risk transfer SPVs | Unconsolidated VIEs    
Variable Interest Entities [Line Items]    
Total Assets 22,205 22,835
Maximum Exposure to Loss 22,215 22,847
Limited partnerships, including low income housing tax credit ("LIHTC") investments    
Variable Interest Entities [Line Items]    
Net carrying amount 2,700 2,500
Limited partnerships, including low income housing tax credit ("LIHTC") investments | Unconsolidated VIEs    
Variable Interest Entities [Line Items]    
Total Assets 7,230 6,973
Maximum Exposure to Loss 746 750
Net carrying amount $ 745 $ 750