v3.25.3
Advances (Portfolio by Year of Contractual Maturity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Federal Home Loan Bank, Advances [Line Items]    
Accrued Interest - Advances $ 5,187,822 $ 4,816,452
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Accrued interest receivable Accrued interest receivable
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract]    
Due in 1 year or less 4.42% 4.65%
Due after 1 year through 2 years 4.28% 4.56%
Due after 2 years through 3 years 4.31% 4.23%
Due after 3 years through 4 years 4.29% 4.50%
Due after 4 years through 5 years 4.06% 4.23%
Thereafter 3.42% 3.38%
Total par value, Weighted Average Interest Rate 4.37% 4.59%
Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract]    
Due in 1 year or less $ 26,636,443 $ 50,974,262
Due after 1 year through 2 years 10,193,785 11,301,368
Due after 2 years through 3 years 4,807,918 4,861,364
Due after 3 years through 4 years 342,627 2,570,166
Due after 4 years through 5 years 60,894 162,463
Thereafter 153,402 158,012
Total Par Value 42,195,069 70,027,635
Deferred prepayment fees (77) (276)
Hedging adjustments (30,695) (154,126)
Total book value 42,164,297 69,873,233
Federal Home Loan Bank Advances    
Federal Home Loan Bank, Advances [Line Items]    
Accrued Interest - Advances $ 204,600 $ 372,700