v3.26.1
Capital - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Apr. 23, 2026
Dec. 31, 2025
Concentration Risk [Line Items]        
Excess Capital $ 132     $ 154
Excess Capital to Assets 0.19%     0.21%
Cash dividends paid $ 128 $ 55    
Mandatorily Redeemable Capital Stock And Capital Stock | S 2025 Q4 Dividends        
Concentration Risk [Line Items]        
Cash dividends paid $ 75      
Dividends, Cash Declared, Annualized Rate 11.36%      
Capital Stock | S 2025 Q4 Dividends        
Concentration Risk [Line Items]        
Cash dividends paid $ 72      
Mandatorily Redeemable Capital Stock | S 2025 Q4 Dividends        
Concentration Risk [Line Items]        
Cash dividends paid $ 3      
Subsequent Event | O 2026 Q1 Dividends        
Concentration Risk [Line Items]        
Interest and Dividends Payable, Current     $ 45  
Subsequent Event | Class B-1 Putable | O 2026 Q1 Dividends        
Concentration Risk [Line Items]        
Dividends, Cash Declared, Annualized Rate     4.75%  
Subsequent Event | Class B-2 Putable | O 2026 Q1 Dividends        
Concentration Risk [Line Items]        
Dividends, Cash Declared, Annualized Rate     10.00%  
Subsequent Event | Class B Putable | O 2026 Q1 Dividends        
Concentration Risk [Line Items]        
Dividends, Cash Declared, Annualized Rate     8.75%