v3.26.1
Derivatives and Hedging Activities Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Advances    
Derivatives, Fair Value [Line Items]    
Amortized cost of hedged items $ 20,851,772 $ 21,996,272
For active fair-value hedging relationships [1] (202,111) 38,005
For discontinued fair-value hedging relationships 0 0
Total cumulative fair-value hedging basis adjustments on hedged items (202,111) 38,005
AFS Securities    
Derivatives, Fair Value [Line Items]    
Amortized cost of hedged items 15,546,015 15,251,368
For active fair-value hedging relationships [1] (652,204) (516,003)
For discontinued fair-value hedging relationships 83,327 109,827
Total cumulative fair-value hedging basis adjustments on hedged items (568,877) (406,176)
Discount Notes    
Derivatives, Fair Value [Line Items]    
Amortized cost of hedged items 9,736,706 9,108,227
For active fair-value hedging relationships [1] (1,328) (13)
For discontinued fair-value hedging relationships 0 0
Total cumulative fair-value hedging basis adjustments on hedged items (1,328) (13)
CO Bonds    
Derivatives, Fair Value [Line Items]    
Amortized cost of hedged items 15,713,141 17,303,980
For active fair-value hedging relationships [1] (495,849) (482,711)
For discontinued fair-value hedging relationships 246 0
Total cumulative fair-value hedging basis adjustments on hedged items $ (495,603) $ (482,711)
[1] Excludes any offsetting effect of the net estimated fair value of the associated derivatives.