Consolidated Obligations - Summary of Issued and Outstanding Consolidated Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total Consolidated obligation bonds	$ 87,695,408	$ 68,466,741
Total Consolidated obligation discount notes	96,790,101	76,019,517
Hedged consolidated obligation bonds
Debt Instrument [Line Items]
Consolidated obligation bonds-amortized cost	87,721,002	68,433,108
Hedge valuation basis adjustments	(112,364)	(51,438)
Hedge basis adjustments on de-designated hedges	88,495	92,610
FVO - valuation adjustments and accrued interest	(1,725)	(7,539)
Total Consolidated obligation bonds	87,695,408	68,466,741
Hedged consolidated obligation discount notes
Debt Instrument [Line Items]
Discount notes-amortized cost	96,764,030	76,011,550
Hedge value basis adjustments	(37,079)	(7,377)
Hedge basis adjustments on de-designated hedges	(100)	(107)
FVO - valuation adjustments and remaining accretion	63,250	15,451
Total Consolidated obligation discount notes	$ 96,790,101	$ 76,019,517

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