Total unpaid principal balance Mortgage loans held for portfolio Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Citibank, N.A. Citibank National Association [Member] Citibank National Association Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Schedule of Outstanding Consolidated Obligation Discount Notes Schedule of Short-Term Debt [Table Text Block] Cash collateral and related accrued interest Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Award Timing Predetermined Award Timing Predetermined [Flag] New York Life Insurance Company New York Life Insurance Company [Member] New York Life Insurance Company Entity File Number Entity File Number Weighted Average Yield Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract] Hedged consolidated obligation discount notes Consolidated Obligation Discount Notes [Member] Consolidated Obligation Discount Notes Tabular List, Table Tabular List [Table Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Mandatorily redeemable capital stock (Note 14) Beginning balance Ending balance Mandatorily redeemable capital stock Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Insurance Companies Insurance Companies [Member] Insurance Companies Schedule of Estimated Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Hedge value basis adjustments Hedge value basis adjustments Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Hedge Valuation Basis Adjustments Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Hedge Valuation Basis Adjustments Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Instruments held under the fair value option gains (losses) (Note 18) Net gains (losses) on financial instruments held under fair value option Fair Value, Option, Changes in Fair Value, Gain (Loss) Manufacturers and Traders Trust Company Manufacturers and Traders Trust Company [Member] Manufacturers and Traders Trust Company Cash collateral and related accrued interest Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Interest rate caps Interest Rate Cap [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Mortgage Asset Programs Mortgage Asset Programs [Member] Mortgage Asset Programs Concentration risk percentage Concentration Risk, Percentage Other assets Increase (Decrease) in Other Operating Assets Employee Stock Option Share-Based Payment Arrangement, Option [Member] First loss account, amount Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, First Loss Account, Amount Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, First Loss Account, Amount Collateralized Mortgage Obligations/Real Estate Mortgage Investment Conduits Collateralized Mortgage Obligations/Real Estate Mortgage Investment Conduits [Member] Collateralized Mortgage Obligations/Real Estate Mortgage Investment Conduits Made Payments for FHLBank Advance, Investing Activities Cash dividends on capital stock Dividends, Common Stock, Cash Total capital Beginning balance Ending balance Capital Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Insider Trading Policies and Procedures [Line Items] Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Proceeds from issuance of capital stock (in shares) Stock Issued During Period, Shares, New Issues Fair Value, Recurring Fair Value, Recurring [Member] Federal Home Loan Bank of Chicago Federal Home Loan Bank of Chicago [Member] Liabilities and capital Liabilities and capital Liabilities and Equity [Abstract] Percentage of Total Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss, Fee, And Loan In Process, Percentage Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss, Fee, And Loan In Process, Percentage Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Amortized Cost Carrying Value Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Transfers of mortgage loans to real estate owned Real Estate Owned, Transfer to Real Estate Owned Risk-based capital Federal Home Loan Bank, Risk-Based Capital, Actual Total, Estimated Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Due after one year through five years Debt Securities, Trading Securities, Maturity, After Year One Through Five, Fair Value Debt Securities, Trading Securities, Maturity, After Year One Through Five, Fair Value Segment Information and Concentration Concentration Risk Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Commitments to fund pension Fund Pension [Member] Fund Pension Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Interest-bearing demand and overnight deposits as percentage of deposits Percentage of Interest-Bearing Domestic Deposits to Deposits Shares reclassified to mandatorily redeemable capital stock (in shares) Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Shares Income before assessments Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Cumulative Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Items Gains (Losses) - Liabilities - Discontinued Hedging Relationship Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Schedule of Rollforward Of Affordable Housing Program Liabilities Activity in Affordable Housing Program Obligation [Table Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total interest expense Interest Expense, Operating Deposits (Note 11) Deposits Interest Expense, Domestic Deposits Net premiums and discounts on consolidated obligations, investments, mortgage loans and other adjustments Investment Income, Net, Amortization of Discount and Premium Floating rate, callable Floating Rate, Callable [Member] Floating Rate, Callable Total capital Federal Home Loan Bank, Regulatory Capital, Required Due after four years through five years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Five Document Fiscal Period Focus Document Fiscal Period Focus Schedule of Fair Value Option Disclosures Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Available-for-sale securities, amortized cost Amortized Cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Award Type Award Type [Axis] Due after five years through ten years Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year 5 Through 10 Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year 5 Through 10 Due after two years through three years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Three Year four Lessee, Operating Lease, Liability, to be Paid, Year Four Qualified Defined Contribution Plan (DC Plan) Qualified Defined Contribution Plan [Member] Qualified Defined Contribution Plan Thereafter Long-Term Debt, Maturity, After Year Five, Weighted Average Rate Long-Term Debt, Maturity, After Year Five, Weighted Average Rate Interest Income Federal Home Loan Bank, Advances, Interest Income, Concentration Risk [Member] Interest Income Federal Home Loan Bank Advances Top Ten Advance Holders Schedule of MPF Mortgage Loans Held-for-portfolio by Collateral/Guarantee Type Financing Receivable, By Collateral Or Guarantee Type [Table Text Block] Financing Receivable, By Collateral Or Guarantee Type Entity Address, City or Town Entity Address, City or Town Net change due to hedging activities Other Comprehensive Income (Loss), Hedge, Gain (Loss), After Reclassification And Tax, Parent [Abstract] Other Comprehensive Income (Loss), Hedge, Gain (Loss), After Reclassification And Tax, Parent Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Consolidated Obligation Bonds Fair Value Option Consolidated Obligation - Bonds, Fair Value Option [Member] Consolidated Obligation - Bonds, Fair Value Option Total capital-to-asset ratio Federal Home Loan Bank, Regulatory Capital Ratio, Actual Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Voluntary Contribution Voluntary Housing And Community Development Program, Voluntary Contributions, Excluding Rebates Voluntary Housing And Community Development Program, Voluntary Contributions, Excluding Rebates Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Due after one year through two years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Two Entity Emerging Growth Company Entity Emerging Growth Company Over two years through three years Long-Term Debt, Maturity, Year Three Advances, net (Note 9) Advances Interest Income Interest Income, Federal Home Loan Bank Advances Schedule of Major Security Types Debt Securities, Held-to-Maturity [Table Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Mortgage Partnership Finance Program Services Mortgage Partnership Finance Program Services [Member] Mortgage Partnership Finance Program Services Total gains (losses) on derivatives in economic hedges Derivative, Gain (Loss) on Derivative, Net Accrued interest payable Financial Instruments Subject to Mandatory Redemption, Accrued Interest Payable Financial Instruments Subject to Mandatory Redemption, Accrued Interest Payable Total other income (loss) Noninterest Income Capital stock, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Consolidated obligation discount notes: Proceeds from (Repayments of) Debt [Abstract] Gross Unrecognized Holding Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Mandatorily redeemable capital stock (Note 14) Mandatorily redeemable capital stock Interest Expense, Capital Securities Morgan Stanley Private Bank, NA Morgan Stanley Private Bank, NA [Member] Morgan Stanley Private Bank, NA Other financial assets Other Assets, Fair Value Disclosure Other expenses Noninterest Expense [Abstract] Cash and due from banks (Note 3) Cash and due from banks Cash and Due from Banks Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Voluntary Contributions (Note 13) Aggregate Voluntary And Supplemental Contributions Aggregate Voluntary And Supplemental Contributions Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Estimated Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Due after one year through five years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Interest income Interest Income, Operating [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Trading securities: Payments to Acquire Investments [Abstract] Other assets Other Assets Balance, beginning of the period Balance, end of the period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Advances Sold or Transferred Advances Sold Or Transferred [Member] Advances Sold Or Transferred Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Actual Federal Home Loan Bank, Actual [Abstract] Federal Home Loan Bank, Actual Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Due in one year or less Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Due in one year or less Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, Year One Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, Year One Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank Branch [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Commitments and Contingencies Disclosure [Abstract] Single-index floating rate Single-Index Floating Rate [Member] Single-Index Floating Rate Due after four years through five years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Five Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Available-for-sale securities, amortized cost of $12,763,624 at June 30, 2026 and $12,377,325 at December 31, 2025 (Note 7) Fair Value Estimated Fair Value Available-for-sale securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Net interest income before provision for credit losses Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Premises, software, and equipment Depreciation Gross recognized amount Derivative Liability, Subject to Master Netting Arrangement, before Offset Equity Components [Axis] Equity Components [Axis] Deposits (Note 11) Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] Standby letters of credit Standby Letters of Credit [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Step Up, callable Step Up, Callable [Member] Step Up, Callable Entity Address, State or Province Entity Address, State or Province Payments on principal portion of finance lease obligation Finance Lease, Principal Payments Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Hedge valuation basis adjustments Hedge valuation basis adjustments Federal Home Loan Bank, Consolidated Obligations, Bonds, Hedge Valuation Adjustments Federal Home Loan Bank, Consolidated Obligations, Bonds, Hedge Valuation Adjustments Mortgage loans held-for-portfolio, net Mortgage loans held-for-portfolio Loans Receivable, Fair Value Disclosure Individual: Individual [Axis] Accounting Changes and Error Corrections [Abstract] Cash dividends paid Payments of Ordinary Dividends, Common Stock Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Due in one year or less Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Next 12 Rolling Months Leverage capital Federal Home Loan Bank, Leverage Capital, Actual Available-for-sale securities (Note 7) Interest Income, Debt Securities, Available-for-Sale, Operating Total other expenses Noninterest Expense U.S. Treasury notes U.S. Treasury notes US Treasury Notes Securities [Member] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Other income (loss) Noninterest Income [Abstract] Customer [Domain] Customer [Domain] Entity Central Index Key (CIK) Entity Central Index Key PEO Name PEO Name Hedging Basis Adjustments, Gross Unrealized Gains Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Accumulated Gross Unrealized Gains, Before Tax, Cumulative Increase (Decrease) Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Accumulated Gross Unrealized Gains, Before Tax, Cumulative Increase (Decrease) Non-interest-bearing demand Non-interest-bearing demand Noninterest-Bearing Domestic Deposit, Demand Schedule of Consolidated Obligation Bonds Outstanding by Year of Maturity Schedule of Maturities of Long-Term Debt [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of Mortgage Loans and Impaired Loans Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Defined Benefit Plan [Table] Defined Benefit Plan [Table] Total par value Par Advances Federal Home Loan Bank, Advances, Par Value Gross amounts of netting adjustments and cash collateral Total netting adjustments and cash collateral Total netting adjustments and cash collateral Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Operating Noninterest Operating Expense Noninterest Operating Expense Schedule of Notional Balances and Estimated Fair Values of the Derivatives Outstanding Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Cumulative Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Items Gains (Losses) - Assets - Active Hedging Relationship Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Real estate owned Real Estate Acquired Through Foreclosure State and local housing finance agency obligations State And Local Housing Finance Agency Obligations [Member] State And Local Housing Finance Agency Obligations 30 days or more past due Financial Asset, Equal To Or Greater Than 30 Days Past Due [Member] Financial Asset, Equal To Or Greater Than 30 Days Past Due Held-to-maturity securities: Proceeds from Sale and Maturity of Held-to-Maturity Securities [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Fair Value Option Activity [Roll Forward] Fair Value Option Activity [Roll Forward] Fair Value Option Activity Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Guardian Life Insurance Co. of America Guardian Life Insurance Company of America [Member] Guardian Life Insurance Company of America Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Amortization of unrecognized past service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Federal funds sold Increase (Decrease) in Federal Funds Sold Trading securities pledged as collateral Debt Securities, Trading, Restricted Fair Value as of Grant Date Award Grant Date Fair Value Amortized Cost Equity Securities, FV-NI, Cost Schedule of Types of Consolidated Obligation Bonds Issued and Outstanding by Interest Rate Payment Terms Schedule of Long-Term Debt Instruments [Table Text Block] Compensation and benefits Labor and Related Expense Total adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Less than 12 months, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Deposits Deposit Liabilities Disclosures [Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Open delivery commitments (MAP) Open Delivery Commitments [Member] Open Delivery Commitments Counterparty Name [Domain] Counterparty Name [Domain] Schedule of Operating Lease Assets and Liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Year two Lessee, Operating Lease, Liability, to be Paid, Year Two MBS-GSE GSE/U.S. agency issued MBS US Government-sponsored Enterprises Debt Securities [Member] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Fixed-rate, callable Fixed-Rate, Callable [Member] Fixed-Rate, Callable Non-PEO NEO Non-PEO NEO [Member] Flagstar Bank, N.A. Flagstar Bank, National Association [Member] Flagstar Bank, National Association Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Schedule of Offsetting of Derivative Assets Offsetting Assets [Table Text Block] All Award Types Award Type [Domain] Year one Lessee, Operating Lease, Liability, to be Paid, Year One Amounts Recorded in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Purchases of mortgage loans, cumulative participations by other Federal Home Loan Banks Participating Mortgage Loans, Mortgage Obligations, Amount Required Federal Home Loan Bank, Requirements [Abstract] Federal Home Loan Bank, Requirements Mortgage-backed securities acquired Payments to Acquire Mortgage-Backed Securities (MBS), Available-for-Sale Affordable Housing Program (Note 13) Beginning balance Ending balance Affordable Housing Program Affordable Housing Program Obligation MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Schedule of Carrying Value and Fair Value of Short-Term Investments Schedule of Carrying Value and Fair Value of Short-Term Investments [Table Text Block] Schedule of Carrying Value and Fair Value of Short-Term Investments Total par value (as a percent) Federal Home Loan Bank, Advances, Percent Of Total Par Value Federal Home Loan Bank, Advances, Percent Of Total Par Value Schedule of Off-Balance Sheet Commitments and Contingencies Schedule Of Off-Balance Sheet Commitments And Contingencies [Table Text Block] Schedule Of Off-Balance Sheet Commitments And Contingencies Over one year through two years Long-Term Debt, Maturity, Year Two, Weighted Average Rate Long-Term Debt, Maturity, Year Two, Weighted Average Rate Schedule of Interest Rate Payment Terms For Investments Schedule Of Interest Rate Payment Terms For Investments [Table Text Block] Schedule Of Interest Rate Payment Terms For Investments Step Down, callable Step Down, Callable [Member] Step Down, Callable Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Total accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Over four years through five years Long-Term Debt, Maturity, Year Five, Percentage Of Total Long-Term Debt, Maturity, Year Five, Percentage Of Total One year or less Long-Term Debt, Maturity, Year One Financial Instruments [Domain] Financial Instruments [Domain] Due after ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Schedule of Cash Flow Hedge Gains and Losses Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Over four years through five years Long-Term Debt, Maturity, Year Five Financing Receivable, Credit Ratio [Line Items] Financing Receivable, Credit Ratio [Line Items] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Securities purchased under agreements to resell Proceeds from (Payments for) Securities Purchased under Agreements to Resell Principal collected Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Over one year through two years Long-Term Debt, Maturity, Year Two, Percentage Of Total Long-Term Debt, Maturity, Year Two, Percentage Of Total Consolidated Obligations Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Operating cash flows - Cash Paid Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Due in one year or less Federal Home Loan Bank, Advances, Maturing in Next 12 Rolling Months, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing in Next 12 Rolling Months, Percent Of Total Par Value Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Weighted average interest rate (as a percent) Short-Term Debt, Weighted Average Interest Rate, at Point in Time Due after three years through four years Federal Home Loan Bank, Advances, Maturing in Rolling Year Four, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing in Rolling Year Four, Percent Of Total Par Value Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Advance discounts Federal Home Loan Bank, Advances, Discount Affordable Housing Program and Voluntary Contributions Affordable Housing Program [Text Block] Derivative [Table] Derivative [Table] Entity Small Business Entity Small Business Document Transition Report Document Transition Report Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Schedules of Concentration of Risk Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Total Fixed Asset-Backed Securities, Fixed, After Hedging Basis Adjustment [Member] Asset-Backed Securities, Fixed, After Hedging Basis Adjustment CMBS Commercial Mortgage Backed Securities Before Hedging Adjustments [Member] Commercial Mortgage Backed Securities Before Hedging Adjustments Underlying Securities Award Underlying Securities Amount Payments for maturing and early retirement Repayments of Other Long-Term Debt Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Bond premiums Debt Instrument, Unamortized Premium Hedging Basis Adjustments, Amortized Cost Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease) Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Derivative Liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Net exposure Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction First loss account, percentage of loan Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, First Loss Account, Percentage Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, First Loss Account, Percentage Risks and Uncertainties [Abstract] Document Type Document Type Level 3 Level 3 Fair Value, Inputs, Level 3 [Member] Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract] Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract] Earnings Per Share of Capital Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Due after one year through five years Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year One Through Five Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year One Through Five Change in accrued interest/unaccreted balance Fair Value, Option, Change In Accrued Interest And Unaccreted Balance Fair Value, Option, Change In Accrued Interest And Unaccreted Balance Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] Yield on trading securities Debt Securities, Trading Securities, Maturity, Percentage Debt Securities, Trading Securities, Maturity, Percentage Over two years through three years Long-Term Debt, Maturity, Year Three, Percentage Of Total Long-Term Debt, Maturity, Year Three, Percentage Of Total Affordable Housing Program Assessments (Note 13) Additions from current period’s assessments Affordable Housing Program Assessments Federal Home Loan Bank, Advances [Line Items] Federal Home Loan Bank, Advances [Line Items] Statistical Measurement [Axis] Statistical Measurement [Axis] Derivative contracts with financing element Payments for (Proceeds from) Hedge, Financing Activities Weighted average shares of capital (in shares) Weighted Average Number of Shares Issued, Basic Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income available to stockholders Net Income (Loss) Available to Common Stockholders, Basic Housing and U.S. Obligations, Floating Housing and U.S. Obligations, Floating [Member] Housing and U.S. Obligations, Floating Due after three years through four years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Four Interest paid for finance lease Noncash, Interest Paid For Finance Lease Noncash, Interest Paid For Finance Lease Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Maturities and terminations Fair Value, Option, Maturities and Terminations Fair Value, Option, Maturities and Terminations Schedule of Gains and Losses on Economic Hedges Derivative Instruments, Gain (Loss) [Table Text Block] Change in fair value adjustments on financial instruments held at fair value Increase (Decrease) in Fair Value Adjustments on Other Assets (Liabilities) Carried at Fair Value under Fair Value Option Percentage of Total Long-Term Debt, Percentage Of Total Long-Term Debt, Percentage Of Total Level 1 Fair Value, Inputs, Level 1 [Member] Related Party Transaction [Table] Related Party Transaction [Table] Par Advances Federal Home Loan Bank, Advances, Concentration Risk [Member] Federal Home Loan Bank, Advances, Concentration Risk Advances (Note 9) (Includes $0 at June 30, 2026 and December 31, 2025 at fair value under the fair value option) Total Advances Federal Home Loan Bank, Advance Due after five year through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fixed-rate, non-callable Fixed-Rate, Non-Callable [Member] Fixed-Rate, Non-Callable Affordable Housing Program liability Increase (Decrease) In Affordable Housing Program Liability Increase (Decrease) In Affordable Housing Program Liability FVO - valuation adjustments and accrued interest FVO - valuation adjustments and accrued interest Federal Home Loan Bank, Consolidated Obligations, Bonds, Fair Value Option, Valuation Adjustments And Accrued Interest Federal Home Loan Bank, Consolidated Obligations, Bonds, Fair Value Option, Valuation Adjustments And Accrued Interest Consolidated obligation bonds (Note 12) Interest Expense, Other Long-Term Debt Investments, Debt and Equity Securities [Abstract] Purchased Payment for Acquisition, Loan, Held-for-Investment Net change in: Net Change In Investing Activities [Abstract] Net Change In Investing Activities Redemption of mandatorily redeemable capital stock Financial Instruments Subject to Mandatory Redemption, Redemptions Financial Instruments Subject to Mandatory Redemption, Redemptions Repurchase/redemption of capital stock Stock Repurchased and Retired During Period, Value Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Uncleared derivatives Over-the-Counter [Member] Cash equivalents Cash Equivalents [Member] Due in one year or less Debt Securities, Trading Securities, Maturity, Year One, Fair Value Debt Securities, Trading Securities, Maturity, Year One, Fair Value Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost, Rolling Maturity [Abstract] Total par value Total par value Long-Term Debt, Gross Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Schedule of Risk-Based Capital Ratios Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Thereafter Long-Term Debt, Maturity, After Year Five, Percentage Of Total Long-Term Debt, Maturity, After Year Five, Percentage Of Total Total mortgage loans amortized cost Total mortgage loans amortized cost Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Derivative gains (losses) (Note 17) Gain (Loss) on Derivative Instruments, Net, Pretax Schedule of Available-for-sale Securities with Estimated Fair Values Below their Amortized Cost Basis Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Other Commitments [Domain] Other Commitments [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities Amount of transaction Related Party Transaction, Amounts of Transaction Change in fair value on Equity Investments Equity Securities, FV-NI, Unrealized Gain (Loss) Risk-based capital Federal Home Loan Bank, Risk-Based Capital, Required Held-to-maturity securities, allowance for credit losses Allowance for Credit Loss (ACL) Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Net change in unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Premises, software, and equipment Property, Plant and Equipment, Net Debt Transfers Debt Transfers [Member] Debt Transfers Percentage of Total Long-Term Debt, Maturity, Percentage Of Total Long-Term Debt, Maturity, Percentage Of Total Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Consolidated obligations, net (Note 12) Federal Home Loan Bank, Consolidated Obligations [Abstract] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Derivative [Line Items] Derivative [Line Items] Premises, software, and equipment Payments for (Proceeds from) Productive Assets Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Total derivatives before netting and collateral adjustments Derivative liabilities Derivative liabilities Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Permanent capital weighting factor Federal Housing Finance Agency, Permanent Capital Weighting Factor Federal Housing Finance Agency, Permanent Capital Weighting Factor Schedule of Mandatorily Redeemable Capital Stock Mandatorily Redeemable Capital Stock [Table Text Block] Transaction [Domain] Transaction [Domain] Housing and U.S. obligations Housing and U.S. obligations Housing and U.S. Obligations [Member] Housing and U.S. Obligations Total net amounts after offsetting adjustments and cash collateral Derivative Liability, Subject to Master Netting Arrangement, after Offset Financial Instrument [Axis] Financial Instrument [Axis] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] 12 months or more, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Purchased Payment for Acquisition, Trading Security, Held-for-Investment Current Fiscal Year End Date Current Fiscal Year End Date Less than 12 months, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Schedule of Information on Mortgage Loans Held-for-portfolio Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loans to other FHLBanks (Note 20) Loans to other FHLBanks Interest Income, Loans to Other Federal Home Loan Banks Derivative liabilities (Note 17) Total derivative assets and total derivative liabilities presented in the Statements of Condition Total derivative assets and total derivative liabilities Derivative Liability Two Advance Holders Two Advance Holders [Member] Two Advance Holders Other expenses Other Noninterest Expense Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Interest rate hedges Interest-rate derivatives Interest Rate Contract [Member] Uncleared derivatives Derivative assets Derivative Asset, Not Subject to Master Netting Arrangement Total, Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Schedule of Fair Values of Assets and Liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Cash and Cash Equivalents [Abstract] Payments for maturing Repayments of Other Short-Term Debt Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Schedule of Held-to-Maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Over one year through two years Long-Term Debt, Maturity, Year Two Interest-bearing Deposits, Federal Funds Sold and Securities Purchased Under Agreements to Resell Deposit Liabilities, Federal Funds Sold, Repurchase Agreements, Resale Agreements, Securities Borrowed, And Securities Loaned Disclosure [Text Block] Deposit Liabilities, Federal Funds Sold, Repurchase Agreements, Resale Agreements, Securities Borrowed, And Securities Loaned Disclosure Other Commitments [Table] Other Commitments [Table] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Issued, guaranteed or insured: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Percentage of Total Federal Home Loan Bank Advances Percentage Of Total Par Value [Abstract] Federal Home Loan Bank Advances Percentage Of Total Par Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Net amounts after offsetting adjustments and cash collateral Derivative Asset, Subject to Master Netting Arrangement, after Offset Concessions on consolidated obligations Amortization of Debt Issuance Costs Entity Tax Identification Number Entity Tax Identification Number Gross Unrealized Gains Equity Securities, FV-NI, Unrealized Gain Over two years through three years Long-Term Debt, Maturity, Year Three, Weighted Average Rate Long-Term Debt, Maturity, Year Three, Weighted Average Rate Capital stock, issued (in shares) Common Stock, Shares, Issued Net unamortized discounts Debt Securities, Held-To-Maturity, Unamortized Discount (Premium), Net Debt Securities, Held-To-Maturity, Unamortized Discount (Premium), Net Qualified Defined Benefit Plan (DB Plan) Qualified Defined Benefit Plan [Member] Qualified Defined Benefit Plan Affordable Housing Program payments Noncash, Affordable Housing Program Payments Noncash, Affordable Housing Program Payments Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Over three years through four years Long-Term Debt, Maturity, Year Four CMBS Commercial Mortgage-Backed Securities [Member] Borrowings from other FHLBanks Loans from Other Federal Home Loan Banks Balance, beginning of the period Balance, end of the period Fair Value, Option, Fair Value Carrying Amount, Liabilities Fair Value, Option, Fair Value Carrying Amount, Liabilities MBS AFS Before Hedging Adjustments Asset-Backed Securities, Before Hedging Adjustments [Member] Asset-Backed Securities, Before Hedging Adjustments Trading Arrangement: Trading Arrangement [Axis] Over four years through five years Long-Term Debt, Maturity, Year Five, Weighted Average Rate Long-Term Debt, Maturity, Year Five, Weighted Average Rate Total Shareholder Return Amount Total Shareholder Return Amount Net change in: Net Change In Financing Activities [Abstract] Net Change In Financing Activities Due after three years through four years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Four Securities purchased under agreements to resell (Note 4) Securities purchased under agreements to resell Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Percentage of Total Long Term Debt Percentage Of Total Par Value Abstract [Abstract] Long Term Debt Percentage Of Total Par Value Abstract Pools of Mortgages Collateralized Mortgage-Backed Securities [Member] Derivative Assets Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Mortgage Loans Held-for-Portfolio Financing Receivables [Text Block] Federal Home Loan Bank, Advances [Table] Federal Home Loan Bank, Advances [Table] Capital stock: Capital Stock [Abstract] Capital Stock Asset Class [Domain] Asset Class [Domain] Due after one year through two years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Two Statement [Line Items] Statement [Line Items] Held-to-maturity securities pledged as collateral Debt Securities, Held-to-Maturity, Restricted Carrying amount of hedged assets Hedged Asset, Fair Value Hedge Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Capital Stock Class B Common Stock [Member] Consolidated obligation bonds: Proceeds from (Repayments of) Long-Term Debt and Capital Securities [Abstract] Pass-through reserves of member institutions deposited with Federal Reserve Banks Cash Pass-through Reserve, Federal Home Loan Bank Net increase (decrease) in cash and due from banks Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Securities gains (losses) (Note 5 & Note 8) Net realized and unrealized (gains) losses on trading securities Debt Securities, Gain (Loss) Statistical Measurement [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Schedule of FHLBNY’s Derivative Activities Based on Notional Amounts Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Thereafter Federal Home Loan Bank, Advances, Maturities Summary, after Rolling Year Five Related Party Transaction [Axis] Related Party Transaction [Axis] Remainder of fiscal year Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Weighted Average Rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Asset Class [Axis] Asset Class [Axis] Derivative assets due to accrued interest Increase (Decrease) in Derivative Assets Interest rate swaps Interest Rate Swap [Member] Less: Mandatorily redeemable capital stock (in shares) Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation Liability in respect of member performance account for PFIs Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Member Performance Account, Liability Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Member Performance Account, Liability Net income Net Income Net income Net Income (Loss) Attributable to Parent, Net of Federal Home Loan Bank Assessments Net unrealized gains (losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Compensating balances Compensating Balance, Amount Retirement Plan Name [Axis] Retirement Plan Name [Axis] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic earnings per share (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Basic Liabilities Liabilities, Fair Value Disclosure [Abstract] Leverage capital Federal Home Loan Bank, Leverage Capital, Required Net unamortized (premium) / discounts Debt Securities, Available-For-Sale, Unamortized Discount (Premium), Net Debt Securities, Available-For-Sale, Unamortized Discount (Premium), Net Par value Short-Term Debt Payments on bond transferred to other FHLBanks Payments for Bonds Transferred to Other Federal Home Loan Banks Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Deposits Deposits, Fair Value Disclosure Gross Unrecognized Holding Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Securities received as collateral Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Asset Schedule of Major Security Types Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] CMO Collateralized Mortgage Obligations [Member] Schedule of Fair Value Measured on Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Security collateral pledged as initial margin to Derivative Clearing Organization Security collateral pledged as initial margin to Derivative Clearing Organization Derivative Asset, Subject to Master Netting Arrangement, Security Collateral Pledged Derivative Asset, Subject to Master Netting Arrangement, Security Collateral Pledged Hedging Designation [Domain] Hedging Designation [Domain] Due after four years through five years Federal Home Loan Bank, Advances, Maturing in Rolling Year Five, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing in Rolling Year Five, Percent Of Total Par Value Total liabilities and capital Liabilities and Equity Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Available-for-Sale Securities Available-for-Sale Securities [Member] Derivative Assets Offsetting Derivative Assets [Abstract] Federal funds sold (Note 4) Interest Income, Federal Funds Sold Uncleared derivatives securities received as Variation Margin Security collateral received from counterparty Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Accounting Policies [Abstract] Schedule of Remaining Maturities of Operating Leases Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Deposits with other FHLBanks Increase (Decrease) in Deposits with Other Federal Home Loan Banks Proceeds from sales Proceeds from Sale, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Pay vs Performance Disclosure [Line Items] MBS-Other U.S. Obligations US Government Agencies Debt Securities [Member] Operating lease liabilities (Note 19) Lease Liabilities Total operating lease liabilities Operating Lease, Liability Past due 90 days or more Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities Liabilities [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Gains (losses) on hedged item in designated and qualifying fair value hedges: Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Year three Lessee, Operating Lease, Liability, to be Paid, Year Three Name Measure Name Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Basis adjustment Financing Receivable, Basis Adjustments Financing Receivable, Basis Adjustments Due in one year or less Federal Home Loan Bank, Advances, Maturities Summary, in Next Rolling 12 Months Repayments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Carrying Value of HTM securities pledged collateral which can be repledged or resold Carrying Value Of Held To Maturity Securities Pledged Collateral Carrying Value Of Held To Maturity Securities Pledged Collateral Gross amounts of netting adjustments and cash collateral Total netting adjustments and cash collateral Derivative liabilities, netting adjustment and cash collateral Derivative liabilities, netting adjustment and cash collateral Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Total assets Assets Advances Federal Home Loan Bank, Advances [Text Block] Finance lease term Lessee, Finance Lease, Term of Contract Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Assets Assets, Fair Value Disclosure [Abstract] Carrying Value of Trading securities pledged collateral which can be repledged or resold Carrying Value Of Trading Securities Pledged Collateral Carrying Value Of Trading Securities Pledged Collateral Fair Value Estimated Fair Value Held-to-maturity securities Debt Securities, Held-to-Maturity, Fair Value Cash dividends on capital stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Due after five years through ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 New transactions elected for fair value option Fair Value, Option, New Transactions Elected Fair Value, Option, New Transactions Elected Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Weighted Average Rate Long Term Debt By Maturity Weighted Average Interest Rate [Abstract] Long Term Debt By Maturity Weighted Average Interest Rate Related Party Related Party [Member] PEO PEO [Member] Schedule of Redemption Terms of the Major Types of Trading Securities Schedule of Amortized Cost and Estimated Fair Value of Investments by Contractual Maturity Schedule of Amortized Cost and Estimated Fair Value of Investments by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Trading securities (Note 5) (Includes $843,961 pledged as collateral at June 30, 2026 and $845,578 at December 31, 2025) Total trading securities Total Fair Value Trading securities Debt Securities, Trading Cumulative Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Items Gains (Losses) - Assets - Discontinued Hedging Relationship Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedge basis adjustments on de-designated hedges Hedge basis adjustments on de-designated hedges Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Hedge Basis Adjustments On De-Designated Hedges Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Hedge Basis Adjustments On De-Designated Hedges Net change in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Interest-bearing demand Interest-bearing demand Interest-Bearing Domestic Deposit, Demand Retained Earnings Retained Earnings [Member] Cash and due from banks at beginning of the period Cash and due from banks at end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Derivative assets (Note 17) Total derivative assets and total derivative liabilities presented in the Statements of Condition Total derivative assets and total derivative liabilities Derivative Asset 12 months or more, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Economic Hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Interest Expense Interest Expense [Member] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Available-for-sale securities: Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale [Abstract] Accrued interest payable Increase (Decrease) in Interest Payable, Net Customer Concentration Risk Customer Concentration Risk [Member] Consolidated obligations, net, discount notes at fair value under the fair value option Consolidated obligation, Discount notes Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Fair Value, Option Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Fair Value, Option Consolidated obligations, net, at fair value under the fair value option Consolidated obligation, Bonds Federal Home Loan Bank, Consolidated Obligations, Bonds, Fair Value, Option Federal Home Loan Bank, Consolidated Obligations, Bonds, Fair Value, Option Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total recurring fair value measurement - Liabilities Liabilities, Fair Value Disclosure Thereafter Lessee, Operating Lease, Liability, to be Paid, Due After Year Four Lessee, Operating Lease, Liability, to be Paid, Due After Year Four Total interest rate contracts notionals Notional Amount of Derivatives Derivative, Notional Amount Advances, Fair Value Option Advances, Fair Value Option [Member] Advances, Fair Value Option City Area Code City Area Code Schedule of Allowance For Credit Losses And The Unpaid Principal Balances Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Investments Investment [Text Block] Litigation settlement Gain (Loss) from Litigation Settlement Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Hedge basis adjustments on de-designated hedges Hedge basis adjustments on de-designated hedges Federal Home Loan Bank, Consolidated Obligations, Bonds, Hedge Basis Adjustments On De-Designated Hedges Federal Home Loan Bank, Consolidated Obligations, Bonds, Hedge Basis Adjustments On De-Designated Hedges Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Government-guaranteed or - insured mortgage loans Loans Insured or Guaranteed by US Government Authorities [Member] Accrued interest receivable Accrued interest receivable Interest Receivable Related Party Transactions [Abstract] Amortization of unrecognized net loss Defined Benefit Plan, Amortization of Gain (Loss) Other liabilities Other Liabilities Equity Investments (Note 6) Fair Value Equity Investments Equity Securities, FV-NI Schedule of Lease Cost Lease, Cost [Table Text Block] Interest expense Interest Expense, Operating [Abstract] Additional AHP contribution Voluntary Housing And Community Development Program, Voluntary Contribution Voluntary Housing And Community Development Program, Voluntary Contribution Concentration Risk [Table] Concentration Risk [Table] Total deposits Deposits Deposits, Domestic Interest-bearing deposits Proceeds from (Payments for) in Interest-Bearing Deposits in Banks Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date [Abstract] Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Hedged consolidated obligation bonds Consolidated Obligation Bonds [Member] Consolidated Obligation Bonds Other Performance Measure, Amount Other Performance Measure, Amount Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Credit Concentration Risk Credit Concentration Risk [Member] Equity investments gains (losses) (Note 6) Equity Securities, FV-NI, Gain (Loss) Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted cash balances Restricted Cash Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] De-designated hedged liabilities, par value Hedged Liability, Discontinued Fair Value Hedge, Par Value Hedged Liability, Discontinued Fair Value Hedge, Par Value Equitable Financial Life Insurance Co. Equitable Financial Life Insurance Company [Member] Equitable Financial Life Insurance Company Goldman Sachs Bank USA Goldman Sachs Bank United States Of America [Member] Goldman Sachs Bank United States Of America Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] OTTI Recognized in AOCI Other Comprehensive Income (Loss), Other Than Temporary Impairment, Held To Maturity Debt Securities, Net Of Tax Other Comprehensive Income (Loss), Other Than Temporary Impairment, Held To Maturity Debt Securities, Net Of Tax Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease right-of-use assets (Note 19) Right-of-use assets Operating Lease, Right-of-Use Asset Depreciation and amortization: Depreciation, Depletion and Amortization [Abstract] Due after two years through three years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Three Reported Value Measurement Reported Value Measurement [Member] Prudential Insurance Company of America The Prudential Insurance Company Of America [Member] The Prudential Insurance Company Of America Leverage ratio Federal Home Loan Bank, Leverage Ratio, Required Federal Home Loan Bank, Leverage Ratio, Required Equity [Abstract] Securities purchased under agreements to resell (Note 4) Interest Income, Securities Purchased under Agreements to Resell Interest paid for Discount Notes Interest Paid, Discount Notes Interest Paid, Discount Notes Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] U.S. Treasury securities US Treasury Securities [Member] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Amount Federal Home Loan Bank, Advances, Par Value, Maturity, Rolling Year [Abstract] Other Commitments [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Schedule of Components of Net Periodic Cost Schedule of Net Benefit Costs [Table Text Block] Cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Schedule of Contractual Redemption Terms and Yields of Advances Federal Home Loan Bank, Advances [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Overnight loans extended to other FHLBanks Loans to Other Federal Home Loan Banks Derivative liabilities due to accrued interest Increase (Decrease) in Derivative Liabilities Nonperforming Financial Instruments Nonperforming Financial Instruments [Member] Unrestricted Retained Earnings, Unappropriated [Member] Principal collected Proceeds from FHLBank Advance, Investing Activities Finance lease liabilities (Note 19) Finance lease liability Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Schedule of Major Security Types of Trading Securities Schedule of Carrying Value of Equity Investments Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Computer Equipment Computer Equipment [Member] Due after one year through two years Federal Home Loan Bank, Advances, Maturing in Rolling Year Two, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing in Rolling Year Two, Percent Of Total Par Value Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] One year or less Long-Term Debt, Maturity, Year One, Weighted Average Rate Long-Term Debt, Maturity, Year One, Weighted Average Rate Thereafter Long-Term Debt, Maturity, after Year Five Consolidated obligation bonds-amortized cost Federal Home Loan Bank, Consolidated Obligations, Bonds, Amortized Cost Federal Home Loan Bank, Consolidated Obligations, Bonds, Amortized Cost Repurchase/redemption of capital stock (in shares) Stock Repurchased and Retired During Period, Shares Assets Assets Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Commitments [Axis] Other Commitments [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Non-Qualified Deferred Incentive Compensation - Defined Contribution component Defined Contribution Plan, Cost, Net Defined Contribution Plan, Cost, Net Fair Values of Financial Instruments Fair Value Disclosures [Text Block] Employee Retirement Plans Retirement Benefits [Text Block] Service fees and other Service Fees And Other Income Service Fees And Other Income Top Ten Advance Holders Top Ten Advance Holders [Member] Top Ten Advance Holders Gains (losses) from extinguishment of debt Losses (gains) from extinguishment of debt Gain (Loss) on Extinguishment of Debt Due after ten years Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year 10 Debt Securities, Held-To-Maturity, Amortized Cost Excluding Accrued Interest, Before Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year 10 Capital (Note 14) Equity, Attributable to Parent [Abstract] Consolidated Obligation - Discount Notes, Fair Value Option Consolidated Obligation - Discount Notes, Fair Value Option [Member] Consolidated Obligation - Discount Notes, Fair Value Option Uncleared derivatives Derivative liabilities Derivative Liability, Not Subject to Master Netting Arrangement Gross recognized amount Derivative Asset, Subject to Master Netting Arrangement, before Offset Restricted Retained Earnings, Appropriated [Member] Commitments to fund additional advances Fund Additional Advances [Member] Fund Additional Advances Held-to-maturity securities (Note 8) Interest Income, Debt Securities, Held-to-Maturity Registrant Name Entity Registrant Name Gain to be recognized to earnings within twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Retirement Plan Name [Domain] Retirement Plan Name [Domain] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Net periodic benefit cost - Defined Benefit component Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Unrestricted Retained Earnings, Unappropriated Asset-Backed Securities, Fixed Asset-Backed Securities, Fixed [Member] Asset-Backed Securities, Fixed Cash collateral held and other borrowings Interest Expense, Other Advances: Proceeds (Payments) From Advances [Abstract] Proceeds (Payments) From Advances Total recurring fair value measurement - Assets Assets, Fair Value Disclosure Provision (Reversal) for credit losses Provision (Reversal) for credit losses Provision for Loan, Lease, and Other Losses Federal funds sold (Note 4) Federal funds sold Federal funds sold Federal Funds Sold Deposits [Abstract] Number of operating segments Number of Operating Segments Operating Leases Leases, Operating [Abstract] Advances, at fair value under the fair value option Federal Home Loan Bank, Advance, Fair Value, Option Federal Home Loan Bank, Advance, Fair Value, Option Yield on trading securities due after one year through five years Debt Securities, Trading Securities, Maturity, Percentage Due After Year One Through Five Debt Securities, Trading Securities, Maturity, Percentage Due After Year One Through Five Schedule of Consolidated Obligations Outstanding Schedule of Debt [Table Text Block] Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Interest cost Defined Benefit Plan, Interest Cost Restatement Determination Date: Restatement Determination Date [Axis] Non-Qualified Deferred Compensation Plan (DCP) Non-Qualified Deferred Compensation Plan [Member] Non-Qualified Deferred Compensation Plan Due after two years through three years Federal Home Loan Bank, Advances, Maturing in Rolling Year Three, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing in Rolling Year Three, Percent Of Total Par Value Name Trading Arrangement, Individual Name Total consolidated obligations Federal Home Loan Bank, Consolidated Obligations Total Change in OCI for Period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Redemption of mandatorily redeemable capital stock Repayments of Mandatory Redeemable Capital Securities Statement of Comprehensive Income [Abstract] Mortgage delivery commitments Mortgage Delivery Commitments [Member] Mortgage Delivery Commitments Equity funds Equity Funds [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Total capital Federal Home Loan Bank, Regulatory Capital, Actual Total net change due to hedging activities Other Comprehensive Income (Loss), Hedge, Gain (Loss), After Reclassification And Tax, Parent Other Comprehensive Income (Loss), Hedge, Gain (Loss), After Reclassification And Tax, Parent Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Total off-balance sheet commitments Other Commitment Proceeds from issuance Proceeds from Other Short-Term Debt Shares reclassified to mandatorily redeemable capital stock Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value Fixed income funds Fixed Income Funds [Member] Liability Class [Axis] Liability Class [Axis] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Trading Securities Available-for-Sale Securities Held-to-Maturity Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Discount notes (Includes $5,358,639 at June 30, 2026 and $577,958 at December 31, 2025 at fair value under the fair value option) Total Consolidated obligation discount notes Discount notes Federal Home Loan Bank, Consolidated Obligations, Discount Notes Restricted Retained Earnings, Appropriated Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Percentage of standard credit enhancement, loan funded Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Accrued Credit Enhancement Fees, Percentage Of Loan Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest, Accrued Credit Enhancement Fees, Percentage Of Loan Capital stock subject to mandatory redemption reclassified from equity Financial Instruments Subject to Mandatory Redemption, Reclassifications Financial Instruments Subject to Mandatory Redemption, Reclassifications Trading Securities, Debt Maturities, Next Rolling Maturity [Abstract] Trading Securities, Debt Maturities, Next Rolling Maturity [Abstract] Trading Securities, Debt Maturities, Next Rolling Maturity Mortgage Partnership Finance Mortgage Partnership Finance [Member] Mortgage Partnership Finance Netting adjustments Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Purchased Payments to Acquire Debt Securities, Available-for-Sale Total comprehensive income (loss) Comprehensive income (loss) Comprehensive Income (Loss), Net of Federal Home Loan Bank Assessments, Attributable to Parent Accrued interest payable Interest Payable Estimated Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Capital stock issued Common Stock, Value, Issued Finance lease right-of-use asset (Note 19) Finance lease right-of-use asset Finance Lease, Right-of-Use Asset, after Accumulated Amortization Total short-term investments Short-Term Investments Equity Investments Payments For (Proceeds From) Equity Securities, FV-NI Payments For (Proceeds From) Equity Securities, FV-NI Gains (losses) on derivatives in designated and qualifying fair value hedges: Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments FVO - valuation adjustments and remaining accretion Hedge basis adjustments on de-designated hedges Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Fair Value Option, Valuation Adjustments And Accretion Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Fair Value Option, Valuation Adjustments And Accretion Housing and U.S. Obligations, Fixed Housing and U.S. Obligations, Fixed [Member] Housing and U.S. Obligations, Fixed Mortgage loans held-for-portfolio (Note 10) Interest and Fee Income, Loans, Consumer, Real Estate Trading securities (Note 5) Interest Income, Debt Securities, Trading, Operating Commitments and Contingencies (Notes 14, 17 and 19) Commitments and Contingencies Fair value hedges Other Comprehensive Income (Loss), Fair Value Hedge, Gain (Loss), After Reclassification And Tax, Parent Other Comprehensive Income (Loss), Fair Value Hedge, Gain (Loss), After Reclassification And Tax, Parent Cleared derivatives Exchange Cleared [Member] Financial Accounting Standards Board (FASB) Standards Issued Accounting Standards Update and Change in Accounting Principle [Text Block] Payments on discount notes transferred to other FHLBanks (a) Payments On Discount Notes Transferred To Other Federal Home Loan Banks Payments On Discount Notes Transferred To Other Federal Home Loan Banks Concentration Risk [Line Items] Concentration Risk [Line Items] Net change in non-credit portion on held-to-maturity securities Other Comprehensive Income (Loss), Held-To-Maturity Securities Adjustment, Net Of Tax, Portion Attributable To Parent Other Comprehensive Income (Loss), Held-To-Maturity Securities Adjustment, Net Of Tax, Portion Attributable To Parent Cumulative Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Items Gains (Losses) - Liabilities - Active Hedging Relationship Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Carrying amount of hedged liabilities Hedged Liability, Fair Value Hedge Hedging Designation [Axis] Hedging Designation [Axis] Consolidated obligation discount notes (Note 12) Interest Expense, Other Short-Term Borrowings Total net exposure cash and non-cash Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Amounts Reclassified From AOCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Derivative Contract [Domain] Derivative Contract [Domain] Mortgage Loans On Real Estate Held For Portfolio [Table] Financing Receivable, Allowance for Credit Loss [Table] Proceeds from issuance of capital stock Proceeds from Issuance of Common Stock All Individuals All Individuals [Member] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Change in net fair value adjustments on derivatives and hedging activities Unrealized Gain (Loss) on Derivatives Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Net disbursements for grants and programs Voluntary Housing And Community Development Program, Payments For Voluntary Contributions Voluntary Housing And Community Development Program, Payments For Voluntary Contributions Debt Assumptions Debt Assumptions [Member] Debt Assumptions MetLife, Inc.: MetLife, Inc. [Member] MetLife, Inc. Debt Securities, Held-to-Maturity [Table] Debt Securities, Held-to-Maturity [Table] Schedule of Carrying Amount of FHLBNY’s Assets and Liabilities Schedule of Derivative Instruments [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Annualized accrual rates Financial Instruments Subject to Mandatory Redemption, Annualized Accrual Rate Financial Instruments Subject to Mandatory Redemption, Annualized Accrual Rate Schedule of Gains and Losses on Fair Value Hedges Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Transaction Type [Axis] Transaction Type [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Net disbursements for grants and programs Payments for Affordable Housing Programs Net change in pension and postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Metropolitan Life Insurance Company Metropolitan Life Insurance Company [Member] Metropolitan Life Insurance Company Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Over three years through four years Long-Term Debt, Maturity, Year Four, Percentage Of Total Long-Term Debt, Maturity, Year Four, Percentage Of Total Unamortized discounts Financing Receivable, Unamortized Purchase Discount Financing Receivable, Unamortized Purchase Discount Affordable Housing Program [Roll Forward] Affordable Housing Program [Roll Forward] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Total interest income Interest Income, Operating Over three years through four years Long-Term Debt, Maturity, Year Four, Weighted Average Rate Long-Term Debt, Maturity, Year Four, Weighted Average Rate Consolidated obligation bonds/discount notes traded not settled Consolidated Obligation Bonds And Discount Notes Traded, Not Settled [Member] Consolidated Obligation Bonds And Discount Notes Traded, Not Settled Other Comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Beginning balance Ending balance Voluntary Housing And Community Development Program, Voluntary Contribution Liability Voluntary Housing And Community Development Program, Voluntary Contribution Liability Amount Long-Term Debt, Fiscal Year Maturity [Abstract] Total retirement plan expenses Pension and Other Postretirement Benefits Cost (Reversal of Cost) Total capital-to-asset ratio Federal Home Loan Bank, Regulatory Capital Ratio, Required Federal Home Loan Bank, Regulatory Capital Ratio, Required Earnings Per Share [Abstract] Year five Lessee, Operating Lease, Liability, to be Paid, Year Five Securities sold under agreement to repurchase Interest Expense, Securities Sold under Agreements to Repurchase Gross Unrealized Losses Equity Securities, FV-NI, Unrealized Loss Affordable Housing Program Disclosure [Abstract] Affordable Housing Program Disclosure Total Floating Asset-Backed Securities, Floating [Member] Asset-Backed Securities, Floating Hedge valuation basis adjustments Federal Home Loan Bank, Advances, Valuation Adjustments for Hedging Activities Fixed medium-term single-family mortgages Fixed Medium Term Mortgage [Member] Fixed Medium Term Mortgage Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Borrowing period from other FHLBanks Loans From Other Federal Home Loan Banks, Term Loans From Other Federal Home Loan Banks, Term Award Timing Disclosures [Line Items] Mortgage loans held-for-portfolio: Payments for (Proceeds from) Loans and Leases [Abstract] Service cost Defined Benefit Plan, Service Cost Measurement Frequency [Domain] Measurement Frequency [Domain] Advances Federal Home Loan Bank Advances [Member] Federal Home Loan Banks [Abstract] Discount notes-amortized cost Amortized cost Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Amortized Cost Federal Home Loan Bank, Consolidated Obligations, Discount Notes, Amortized Cost Proceeds from issuance Proceeds from Issuance of Other Long-Term Debt Capital and Mandatorily Redeemable Capital Stock Equity [Text Block] Mortgage loans held-for-portfolio, net of allowance for credit losses of $4,273 at June 30, 2026 and $3,691 at December 31, 2025 (Note 10) Total mortgage loans, carrying values net Total mortgage loans held-for-portfolio at carrying value Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Payments for repurchase/redemption of capital stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Operating lease term Lessee, Operating Lease, Term of Contract Customer [Axis] Customer [Axis] Financing Receivable, Credit Ratio [Table] Financing Receivable, Credit Ratio [Table] Schedule of Offsetting of Derivative Liabilities Offsetting Liabilities [Table Text Block] Total retained earnings Retained Earnings (Accumulated Deficit) Unamortized premiums Financing Receivable, Unamortized Purchase Premium Financing Receivable, Unamortized Purchase Premium Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Purchased Payments to Acquire Held-to-Maturity Securities Fixed long-term single-family mortgages Fixed Long Term Mortgage [Member] Fixed Long Term Mortgage Pass-through Pass Thru Mortgage-Backed Securities [Member] Pass Thru Mortgage-Backed Securities Valley National Bank Valley National Bank [Member] Valley National Bank Deposits and other borrowings Increase (Decrease) in Deposits and Other Borrowings Increase (Decrease) in Deposits and Other Borrowings Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Statement [Table] Statement [Table] Lender Concentration Risk Lender Concentration Risk [Member] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Total net amount of non-cash collateral received or repledged Derivative Asset, Subject to Master Netting Arrangement, Security Collateral Pledged, Net Derivative Asset, Subject to Master Netting Arrangement, Security Collateral Pledged, Net Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Revenue Benchmark Revenue Benchmark [Member] Conventional mortgage loans Conventional Mortgage Loan [Member] Annual lease receipt Lessor, Operating Lease, Annual Lease Receipt Lessor, Operating Lease, Annual Lease Receipt Financial Instruments Subject to Mandatory Redemption [Roll Forward] Financial Instruments Subject to Mandatory Redemption [Roll Forward] Financial Instruments Subject to Mandatory Redemption Schedule of Roll Forward of Level 3 Available-For-Sale Securities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag One year or less Long-Term Debt, Maturity, Year One, Percentage Of Total Long-Term Debt, Maturity, Year One, Percentage Of Total Transfers and Servicing [Abstract] Termination Date Trading Arrangement Termination Date Interest-bearing deposits (Note 4) Interest-bearing deposits Interest-bearing deposits Interest-Bearing Deposits in Banks and Other Financial Institutions Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Mortgage loans held-for-portfolio, allowance for credit losses Allowance for credit losses Allowance for credit losses on mortgage loans held for portfolio Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Receivable [Domain] Receivable [Domain] Weighted Average Discount Rate Operating Lease, Weighted Average Discount Rate, Percent Average number of shares of capital used to calculate earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Finance Agency and Office of Finance Finance Agency And Office Of Finance Expense Finance Agency And Office Of Finance Expense Metropolitan Tower Life Insurance Company Metropolitan Tower Life Insurance Company [Member] Metropolitan Tower Life Insurance Company Related Party Transaction [Domain] Related Party Transaction [Domain] Total derivatives not designated as hedging instruments Derivative assets Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Schedule of Summary of Deposits and Interest Rate Payment Terms Deposit Liabilities, Type [Table Text Block] Operating Lease Expense Operating Lease, Expense Yield on trading securities due in one year or less Debt Securities, Trading Securities, Maturity, Percentage Due Year One Debt Securities, Trading Securities, Maturity, Percentage Due Year One Debt Disclosure [Abstract] Voluntary contributions for ZPA Zero Percent Advance Program, Interest Rebates Zero Percent Advance Program, Interest Rebates Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Proceeds from sales of REO Proceeds from Sale of Foreclosed Assets Bond discounts Debt Instrument, Unamortized Discount Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Net unrealized fair value losses Debt Securities, Trading, Unrealized Loss Schedule of Changes in Voluntary Contribution Liability Schedule of Activity in Voluntary Contribution Liability [Table Text Block] Schedule of Activity in Voluntary Contribution Liability Capital stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Thereafter Federal Home Loan Bank, Advances, Maturing After Rolling Year Five, Percent Of Total Par Value Federal Home Loan Bank, Advances, Maturing After Rolling Year Five, Percent Of Total Par Value Cash and Due from Banks Cash and Cash Equivalents Disclosure [Text Block] Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Postretirement Health Benefit Plan Postretirement Health Benefit Plan [Member] Postretirement Health Benefit Plan Netting adjustments Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Capital stock subject to mandatory redemption reclassified from equity Capital Stock Subject To Mandatory Redemption Reclassified From Equity Capital Stock Subject To Mandatory Redemption Reclassified From Equity Allowance for credit losses on AFS securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest De-designated hedged assets, par value Hedged Asset, Fair Value Hedge, Par Value Hedged Asset, Fair Value Hedge, Par Value Total liabilities Liabilities Bonds (Includes $222,840 at June 30, 2026 and $556,866 at December 31, 2025 at fair value under the fair value option) Total Consolidated obligation bonds Bonds Federal Home Loan Bank, Consolidated Obligations, Bonds Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) [Member] Voluntary Contribution Liability [Roll Forward] Voluntary Contribution Liability [Roll Forward] Voluntary Contribution Liability Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Schedule of Employee Retirement Plan Expenses Schedule of Costs of Retirement Plans [Table Text Block] Teachers Ins. and Annuity Assoc of America Teachers Ins. And Annuity Assoc Of America [Member] Teachers Ins. And Annuity Assoc Of America Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Thereafter Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing after Rolling Year Five Proceeds from issuance of capital stock Stock Issued During Period, Value, New Issues Leverage ratio Federal Home Loan Bank, Leverage Ratio, Actual Mortgage-backed securities Total MBS Asset-Backed Securities [Member] Carrying Value of AFS securities pledged collateral which can be repledged or resold Carrying Value Of Available For Sale Securities Pledged Collateral Carrying Value Of Available For Sale Securities Pledged Collateral Total par value (as a percent) Federal Home Loan Bank, Advances, Weighted Average Interest Rate Counterparty Name [Axis] Counterparty Name [Axis] Repayments Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Interest-bearing deposits (Note 4) Interest-bearing deposits Interest Income, Domestic Deposits Held-to-maturity securities, net of allowance for credit losses of $86 at June 30, 2026 and $76 at December 31, 2025 (Note 8) (Includes $0 pledged as collateral at June 30, 2026 and December 31, 2025) Carrying Value Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Non-NEOs Non-NEOs [Member]