Consolidated Obligations (Consolidated Obligation Bonds by Earlier of Contractual Maturity or Next Call Date) (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 64,494,750	$ 38,903,990
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	8,916,900	3,468,100
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	1,820,260	2,634,525
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	1,194,500	1,328,135
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	1,685,500	1,249,500
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	3,307,000	3,303,000
Long-term Debt, Gross	81,418,910	50,887,250
Earlier of Contractual Maturity or Next Call Date [Member] [Member]
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	71,031,750	45,619,490
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	7,950,400	1,746,100
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	813,260	1,908,025
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	562,000	431,135
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	442,500	519,500
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	$ 619,000	$ 663,000

Schedule of Short-term and Long-term Debt [Line Items]

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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-Name Accounting Standards Codification
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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