Consolidated Obligations (Consolidated Obligation Bonds by Earlier of Contractual Maturity or Next Call Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule of Short-term and Long-term Debt [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 44,640,140	$ 69,412,265
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	5,522,500	8,746,000
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	3,196,650	2,462,900
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	1,503,410	2,484,125
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	1,398,500	1,905,135
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	3,524,000	3,285,000
Long-term Debt, Gross	59,785,200	88,295,425
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	54,585,140	81,109,765
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	1,619,000	3,376,500
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	1,700,150	1,007,900
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	657,410	1,713,125
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	520,500	336,135
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	$ 703,000	$ 752,000

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Paragraph 4
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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
-SubTopic 235
-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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