Total mortgage loans held for portfolio, UPB Total mortgage loans held for portfolio, UPB Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Range [Domain] Statistical Measurement [Domain] Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Discount Notes Schedule of Short-Term Debt [Table Text Block] Unamortized premium, net Debt Securities, Held-to-Maturity, Unamortized Premium, Net Debt Securities, Held-to-Maturity, Unamortized Premium, Net Net gains on sales of available-for-sale securities Realized Investment Gains (Losses) Amortized Cost - AFS Amortized Cost - AFS Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Thereafter Federal Home Loan Bank, Advances, Maturities Summary, after Rolling Year Five Discount notes Short-Term Debt, Fair Value Cash collateral received from counterparties Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Total CO bonds, par value, WAIR % Long-Term Debt, Weighted Average Interest Rate, at Point in Time Real Estate [Domain] Real Estate [Domain] Entity File Number Entity File Number Interest-rate swaps Interest Rate Swap [Member] Net income Net income Net Income (Loss) Attributable to Parent, Net of Federal Home Loan Bank Assessments Applicable fair value hedging-basis adjustment Debt Securities, Available-for-sale, Fair Value Hedging Basis Adjustment Debt Securities, Available-for-sale, Fair Value Hedging Basis Adjustment Recently Issued Accounting Guidance New Accounting Pronouncements, Policy [Policy Text Block] Mandatorily redeemable capital stock (Note 8) Liability at beginning of period Liability at end of period Total MRCS, par value MRCS Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Retained earnings: Retained Earnings (Accumulated Deficit) [Abstract] Advances, % of total Federal Home Loan Bank Advances, Percent of Principal Federal Home Loan Bank Advances, Percent of Principal Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Measurement Basis [Axis] Related Party and Other Transactions Related Party Transactions Disclosure [Text Block] Gain (Loss) on Investments, Including Marketable Securities and Investments Held at Cost, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Advances Advances [Member] Advances [Member] Leverage capital, required Federal Home Loan Bank, Leverage Capital, Required Year 1 Financial Instrument Subject to Mandatory Redemption, Maturity, Year One Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Cash collateral pledged to counterparties Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Pension benefits, net Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Deposits Deposits, Fair Value Disclosure Gross Unrecognized Holding Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Available-for-Sale (AFS) Securities by Major Security Type Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Other assets Increase (Decrease) in Other Operating Assets Fixed-rate medium-term1 mortgages Loans Receivable With Fixed Rates Of Interest Medium Term [Member] Loans Receivable With Fixed Rates Of Interest Medium Term [Member] Cash activities: Cash Activities [Abstract] Cash Activities - Supplemental Cash Flow Activities Step-up Step-up Interest Rate [Member] Step-up Interest Rate Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Total trading securities at estimated fair value Trading securities Debt Securities, Trading, and Equity Securities, FV-NI Disbursements to members Payments for FHLBank Advance, Investing Activities Cash dividends on capital stock Dividends, Common Stock, Cash Total capital Beginning Balance Ending Balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Hedging Designation [Domain] Hedging Designation [Domain] Accrued interest Financing Receivable, Accrued Interest, after Allowance for Credit Loss Proceeds from issuance of capital stock (in shares) Stock Issued During Period, Shares, New Issues Total liabilities and capital Liabilities and Equity Class B-1 Subclass B1 [Member] -- None. No documentation exists for this element. -- Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Amount Long-Term Debt, Rolling Maturity [Abstract] AFS Securities Available-for-Sale Securities [Member] Cover [Abstract] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Derivative Assets Offsetting Derivative Assets [Abstract] Maximum Maximum [Member] Federal funds sold Interest Income, Federal Funds Sold Risk-based capital, actual Federal Home Loan Bank, Risk-Based Capital, Actual Capital stock (putable at par value of $100 per share): Stockholders' Equity, Number of Shares, Par Value and Other Disclosure [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Principal repayments Principal repayments from Loans to Other Federal Home Loan Banks Principal repayments from loans to other Federal Home Loan Banks Total Estimated Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Interest-rate forwards Commitments to purchase mortgage loans, net Forward Contracts [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Past contractual redemption date Financial Instruments Subject to Mandatory Redemption, Past Contractual Redemption Date, Due to Outstanding Activity MDCs Mortgage Receivable Mortgage Receivable [Member] Liabilities: Liabilities [Abstract] Derivative, Collateral, Right to Reclaim Securities That Cannot Be Sold or Rehedged Derivative, Collateral, Right to Reclaim Securities That Cannot Be Sold or Rehedged Amount of right to reclaim securities collateral that cannot be sold or repledged under master netting arrangements that have not been offset against derivative liabilities. Interest-bearing deposits Interest Income, Deposits with Financial Institutions Shares Reclassified to (from) mandatorily redeemable capital stock, net (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] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] For discontinued fair-value hedging relationships Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Net gains (losses) on hedged items³ Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Loans to other Federal Home Loan Banks: Loans to Other Federal Home Loan Banks [Abstract] Annualized cash dividend rate on capital stock Annualized Cash Dividend Rate on Capital Stock Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Total interest expense Interest Expense, Operating Deposits Interest Expense, Domestic Deposits Year 4 Financial Instrument Subject to Mandatory Redemption, Maturity, Year Four Due in 1 year or less Federal Home Loan Bank, Advances, Maturities Summary, in Next Rolling 12 Months Net change in deposits Increase (Decrease) in Deposits Proceeds from paydowns and maturities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Total other comprehensive income Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Regulatory capital, required Federal Home Loan Bank, Regulatory Capital, Required Due after 4 through 5 years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Five Net advances (repayments) Net Advances to Directors Financial Institutions Net Advances to Directors Financial Institutions Class of Stock [Line Items] Class of Stock [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] CO Bonds Unsecured Debt [Member] Netting adjustments and cash collateral, derivative liability Gross amounts of netting adjustments and cash collateral Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Due after 4 through 5 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Five Schedule of Distributions on Mandatorily Redeemable Capital Stock Schedule of Distributions on Mandatorily Redeemable Capital Stock [Table Text Block] Schedule of Distributions on Mandatorily Redeemable Capital Stock [Table Text Block] Total assets Assets Advances Federal Home Loan Bank, Advances [Text Block] Government-guaranteed or -insured US Government Agency Insured Loans [Member] Due after 2 through 3 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Three Securities purchased under agreements to resell Securities Purchased Under Agreements to Resell, Fair Value Disclosure Securities Purchased Under Agreements to Resell, Fair Value Disclosure Callable Callable [Member] Callable [Member] Entity Address, City or Town Entity Address, City or Town Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Net gains (losses) on trading securities held at period end Debt Securities, Trading, Unrealized Gain (Loss) Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Origination term Mortgage Loans on Real Estate, Original Contractual Terms Mortgage Loans on Real Estate, Original Contractual Terms Regulatory permanent capital-to-asset ratio, actual Federal Home Loan Bank, Regulatory Capital Ratio, Actual Due after 1 through 2 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Two Due after 1 year through 5 years, Amortized cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Entity Emerging Growth Company Entity Emerging Growth Company Estimated fair value - HTM Securities Estimated Fair Value - HTM Debt Securities, Held-to-Maturity, Fair Value Advances Interest Income, Federal Home Loan Bank Advances Entity Common Stock, Outstanding (in shares) Entity Common Stock, Shares Outstanding HTM Securities by Major Security Type Debt Securities, Held-to-Maturity [Table Text Block] Debt Securities, Available-for-sale [Line Items] Available-for-sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Total other income Noninterest Income Common stock outstanding (in shares) Common Stock, Shares, Outstanding Swaptions Interest Rate Swaption [Member] Gross Unrecognized Holding Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Mandatorily redeemable capital stock Interest Expense, Capital Securities Document Information [Table] Document Information [Table] Other Expenses: Noninterest Expense [Abstract] Cash and due from banks Cash and Due from Banks AFS Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Trading securities (Note 3) Debt Securities, Trading For discontinued fair-value hedging relationships Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Class of Financing Receivable, Type [Domain] Class of Financing Receivable [Domain] Due after 2 years through 3 years, WAIR % Long-term Debt Maturities, Repayments of Principal in Year Thre, Weighted Average Interest Rate Long-term Debt Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate Due after 2 years through 3 years, amount Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three Due in 1 year or less, Fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Net changes in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Fixed-rate long-term mortgages Loans Receivable With Fixed Rates Of Interest Long Term [Member] Loans Receivable With Fixed Rates Of Interest Long Term [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Retained Earnings Total Retained Earnings [Member] Discount notes maturity period Discount Notes, Maturity Period Discount Notes, Maturity Period Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cash and due from banks at beginning of period Cash and due from banks at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative assets, net (Note 6) Derivative Asset, Total Derivative assets, net Derivative Asset 12 Months or More, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Class B Common Class B [Member] Other assets Other Assets 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 Document Information [Line Items] Document Information [Line Items] Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] OCI before reclassifications: Other Comprehensive Income (Loss) before Reclassifications, Tax [Abstract] Total liabilities at recurring estimated fair value Liabilities, Fair Value Disclosure Due after 3 years through 4 years, WAIR % Long-term Debt Maturities, Repayments of Principal i Year Four, Weighted Average Interest Rate Long-term Debt Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate Notional amount of derivatives Derivative, Notional Amount Single Family Single Family [Member] Financing Receivable, Practical Expedient, Accrued Interest Exclusion [true false] Financing Receivable, Practical Expedient, Accrued Interest Exclusion [true false] Thereafter Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, after Rolling Year Five City Area Code City Area Code Other, net Noninterest Income, Other Operating Income Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Due after 4 through 5 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Five Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] FHLB system outstanding consolidated obligations Obligation with Joint and Several Liability Arrangement, Amount Outstanding Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract] Federal Home Loan Bank, Advances, Par Value, Earlier of Contractual Maturity or Next Call Date, Rolling Year [Abstract] Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Net capital stock issuances (redemptions and repurchases) Net Capital Stock Issuances To Directors' Financial Institutions Net capital stock issuances to Directors' Financial Institutions Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accrued interest receivable Interest Receivable Related Party Transactions [Abstract] Related Party Transactions [Abstract] Total Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale Available-for-sale securities (amortized cost of $15,546,015 and $15,251,368) (Note 3) Estimated Fair Value Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Net interest income Interest Income (Expense), Operating Other liabilities Other Liabilities Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Gross recognized amount Derivative Liability, Subject to Master Netting Arrangement, before Offset Statement, Equity Components [Axis] Equity Components [Axis] Standby letters of credit outstanding1 Standby Letters of Credit [Member] Deposits Deposits, Domestic Federal Home Loan Bank, Advances, Maturity, Rolling Year [Abstract] Federal Home Loan Bank, Advance, Maturity, Rolling Year [Abstract] Interest-bearing deposits Proceeds from (Payments for) in Interest-Bearing Deposits in Banks Supplemental Disclosures: Supplemental Cash Flow Information [Abstract] Net interest settlements on derivatives Net Interest Settlements Represents interest income/expense on derivatives in qualifying fair-value hedging relationships. Does not include interest income/expense of the respective hedged item. Entity Address, State or Province Entity Address, State or Province Total interest income Interest and Dividend Income, Operating Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Related Party [Domain] Related and Nonrelated Parties [Domain] Mortgage loans held for portfolio, net Loans Receivable, Fair Value Disclosure Percent of advances par value held by top five borrowers Percent of Advances Par Value Held by Top Five Borrowers Percent of Advances Par Value Held by Top Five Borrowers Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Other Comprehensive Income: Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Transactions with Directors' Financial Institutions Directors' Financial institutions Activity [Table Text Block] Directors' Financial institutions Activity [Table Text Block] Hedging basis adjustments, net Loans and Leases Receivable, Hedging Basis Adjustment Loans and Leases Receivable, Hedging Basis Adjustment Debt Securities, Held-to-Maturity, Excluded Accrued Interest [true false] Debt Securities, Held-to-Maturity, Excluded Accrued Interest [true false] Accounting Changes and Error Corrections [Abstract] Dividend payments on capital stock Payments of Ordinary Dividends, Common Stock Net Cash Provided by (Used in) Investing Activities, Total Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Cash activity: Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Amortized Cost - MBS Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Due after 3 through 4 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Four Entity Interactive Data Current Entity Interactive Data Current Due after 4 years through 5 years, amount Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Five Due after 2 through 3 years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Three Carrying value Reported Value Measurement [Member] Due in 1 year or less Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Next 12 Rolling Months Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Leverage capital, actual Federal Home Loan Bank, Leverage Capital, Actual Available-for-sale securities Interest Income, Debt Securities, Available-for-Sale, Operating Securities purchased under agreements to resell Interest Income, Securities Purchased under Agreements to Resell Interest Income: Interest and Dividend Income, Operating [Abstract] Federal Housing Finance Agency Regulator Expenses, Cost Assessed on Federal Home Loan Bank Accrued Interest Receivable Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss Total other expenses Noninterest Expense 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] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] U.S. Treasury obligations US Treasury Securities [Member] Year of Contractual Maturity, Amount Federal Home Loan Bank, Advances, Par Value, Maturity, Rolling Year [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Other Income: Noninterest Income [Abstract] Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract] Federal Home Loan Bank, Advances, Par Value, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year [Abstract] Summary of Advances Redemption Terms Federal Home Loan Bank, Advances [Table Text Block] Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Other U.S. obligations - guaranteed single-family Single Family, Mortgage-backed Securities, Other US Obligations [Member] Debt securities collateralized by single family real estate mortgage loans (mortgages), issued by US government agencies, such as the Government National Mortgage Association (GNMA or Ginnie Mae). Excludes mortgage backed securities issued by Government-sponsored Enterprises (GSEs), which are not backed by the full faith and credit of the US Government. Loans to other FHLBanks Loans to Other Federal Home Loan Banks Year of Contractual Maturity, WAIR % Federal Home Loan Bank, Advances, Weighted Average Interest Rate [Abstract] Redemption/repurchase of capital stock Stock Repurchased During Period, Value Schedule of Changes in the Components of AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Retained Earnings, Unrestricted Retained Earnings, Unappropriated [Member] Entity Central Index Key Entity Central Index Key Offsetting of Derivative Assets and Derivative Liabilities Offsetting Derivative Assets and Liabilities [Table Text Block] Offsetting Derivative Assets and Liabilities [Table Text Block] CO Bonds by Year of Contractual Maturity (or Next Call Date) Schedule of Maturities of Long-Term Debt [Table Text Block] Net interest rate settlements Net Interest Settlements [Member] Net Interest Settlements [Member] Net gains (losses) on derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Principal repayments Proceeds from FHLBank Advance, Investing Activities Total advances, par value Total advances, par value Federal Home Loan Bank, Advances, Par Value Debt Securities, Trading, and Equity Securities, FV-NI Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Netting adjustments and cash collateral, derivative asset Gross amounts of netting adjustments and cash collateral Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Notional Amount and Estimated Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Unamortized premiums Loans and Leases Receivable, Unamortized Premiums Loans and Leases Receivable, Unamortized Premiums Due after 4 years through 5 years, WAIR % Long-term Debt Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate Long-term Debt Maturities, Repayments of Principal in Year Five, Weighted Average Interest Rate Total cumulative fair-value hedging basis adjustments on hedged items Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Interest-bearing deposits Interest-bearing Deposits, Fair Value Disclosure Interest-bearing Deposits, Fair Value Disclosure Due after 1 through 2 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Two Assets: Assets: Assets [Abstract] Year 3 Financial Instrument Subject to Mandatory Redemption, Maturity, Year Three AOCI Attributable to Parent [Abstract] AOCI Attributable to Parent [Abstract] Estimated Fair Values Fair Value Disclosures [Text Block] Capital (Note 8): Equity, Attributable to Parent [Abstract] Held-to-maturity securities: Proceeds from Sale and Maturity of Held-to-Maturity Securities [Abstract] Mandatorily Redeemable Capital Stock Activity [Roll Forward] Mandatorily Redeemable Capital Stock [Roll Forward] Mandatorily Redeemable Capital Stock [Roll Forward] Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Expire within one year Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring Within One Year The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition, which expire within one year of the balance sheet date. Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative instruments not meeting netting requirements Derivative Liability, Not Subject to Master Netting Arrangement Schedule of Capital Stock Outstanding by Sub-series Schedule of Stock by Class [Table Text Block] Gross recognized amount Derivative Asset, Subject to Master Netting Arrangement, before Offset Retained Earnings, Restricted Retained Earnings, Appropriated [Member] Federal funds sold Increase (Decrease) in Federal Funds Sold Amortization and depreciation Depreciation, Amortization and Accretion, Net Held-to-maturity securities Interest Income, Debt Securities, Held-to-Maturity Entity Registrant Name Entity Registrant Name Long-term Debt by Maturity Type [Axis] Long-term Debt by Maturity Type [Axis] Long-term Debt by Maturity Type Unrestricted Retained Earnings, Unappropriated CO Bonds by Interest-Rate Payment Type and Redemption Feature Schedule of Long-Term Debt Instruments [Table Text Block] Compensation and benefits Labor and Related Expense Capital stock, % of total Capital Stock Value, Including Mandatorily Redeemable Stock, Percent Capital Stock Value, Including Mandatorily Redeemable Stock, Percent Due after 1 year through 2 years, amount Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two Total adjustments, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Debt Securities, Available-for-Sale, Excluded Accrued Interest from Amortized Cost [true false] Debt Securities, Available-for-Sale, Excluded Accrued Interest from Amortized Cost [true false] Derivative Hedged Item [Axis] Derivative Hedged Item [Axis] Information by type of derivative item hedged Related Party Transaction [Line Items] Related Party Transaction [Line Items] Fixed-rate Fixed Interest Rate [Member] Fixed Interest Rate Document Quarterly Report Document Quarterly Report Year 5 Financial Instrument Subject to Mandatory Redemption, Maturity, Year Five Less than 12 Months, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total assets at estimated fair value Assets, Fair Value Disclosure Federal funds sold Federal Funds Sold Financial Asset, Past Due Financial Asset, Past Due [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] GSE and TVA debentures GSE and TVA debentures US Government-sponsored Enterprises Debt Securities [Member] Unamortized premium (discount) Debt Securities, Available-for-sale, Net Unamortized Premium (Discount) Debt Securities, Available-for-sale, Net Unamortized Premium (Discount) Mandatorily Redeemable Capital Stock [Abstract] Mandatorily Redeemable Capital Stock [Abstract] Mandatorily Redeemable Capital Stock [Abstract] Unamortized discounts Loans and Leases Receivable, Unamortized Discounts Loans and Leases Receivable, Unamortized Discounts New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Net change in unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, before Tax, Portion Attributable to Parent Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Related Party [Axis] Related and Nonrelated Parties [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) before Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss) before Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss) before Tax Due after 5 years through 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Long-term Debt by Maturity Type [Domain] Long-term Debt by Maturity Type [Domain] Long-term Debt by Maturity Type Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Total consolidated obligations, net Federal Home Loan Bank, Consolidated Obligations Short-Term Debt [Table] Short-Term Debt [Table] Loans from other Federal Home Loan Banks: Loans from other Federal Home Loan Banks [Abstract] Loans from other Federal Home Loan Banks Par value Debt Instrument, Face Amount Mortgage Loans Held for Portfolio by Term and Type Mortgage Loans Held For Portfolio [Table Text Block] Tabular disclosure of mortgage loans held for portfolio (can include unpaid principal balance, premiums, discounts, deferred loan costs and hedging adjustments). Redemptions/repurchases Repayments of Mandatory Redeemable Capital Securities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Fair Value Total Estimate of Fair Value Measurement [Member] Offsetting Assets [Table] Offsetting Assets [Table] Affordable Housing Program payable Affordable Housing Program Obligation Regulatory capital, actual Federal Home Loan Bank, Regulatory Capital, Actual Net realized (gains) from sales of AFS securities Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Capital stock, par value Capital Stock Value, Including Mandatorily Redeemable Stock Capital Stock Value, Including Mandatorily Redeemable Stock Discount notes Proceeds from Other Short-Term Debt Financing Receivable, Past Due 30 days or more [Line Items] Financing Receivable, Past Due [Line Items] Thereafter, amount Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five Shares reclassified to mandatorily redeemable capital stock, net Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value Commitments to fund additional advances Loan Origination Commitments [Member] Financial Instruments [Domain] Financial Instruments [Domain] Total accumulated other comprehensive income (Note 9) Accumulated Other Comprehensive Income (Loss), before Federal Home Loan Bank Assessments Discount Notes Short-Term Debt [Member] Federal funds sold Federal Funds Sold, Fair Value Disclosure Federal Funds Sold, Fair Value Disclosure Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Discount notes Book value Federal Home Loan Bank, Consolidated Obligations, Discount Notes Due after 1 year through 2 years, WAIR % Long-term Debt Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate Long-term Debt Maturities, Repayments of Principal in Year Two, Weighted Average Interest Rate Securities purchased under agreements to resell Proceeds from (Payments for) Securities Purchased under Agreements to Resell Restricted Retained Earnings, Appropriated Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Principal collections Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Federal Home Loan Bank Advances Receivable Federal Home Loan Bank Advances Receivable [Member] Federal Home Loan Bank Advances Receivable Net interest income after provision for (reversal of) credit losses Interest Income (Expense), after Provision for Loan Loss Due after 2 through 3 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Three Interest Expense: Interest Expense, Operating and Nonoperating [Abstract] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Purchases Payments to Acquire Debt Securities, Available-for-Sale Total comprehensive income Comprehensive income Comprehensive Income (Loss), Net of Federal Home Loan Bank Assessments, Attributable to Parent Consolidated Obligations Debt Disclosure [Text Block] Leverage ratio, required Leverage Ratio, Required Leverage Ratio, Required State housing agency obligations US States and Political Subdivisions Debt Securities [Member] Estimated Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Accrued interest payable Interest Payable Due after 2 through 3 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Three Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Due in 1 year or less, WAIR % Long-Term Debt Maturities Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate Long-Term Debt Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate Net gains (losses) on derivatives² Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Mortgage loans held for portfolio Interest and Fee Income, Loans, Consumer, Real Estate Thereafter Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, after Rolling Year Five Weighted average effective interest rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time Trading securities Interest Income, Debt Securities, Trading, Operating Commitments and contingencies (Note 11) Commitments and Contingencies Due in 1 year or less Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Next Rolling 12 Months Federal Home Loan Bank, Advances, Discount Federal Home Loan Bank, Advances, Discount Fair-value hedging basis adjustments, net fhlb_FederalHomeLoanBankConsolidatedObligationsBondsAdjustmentforHedgingActivities fhlb_FederalHomeLoanBankConsolidatedObligationsBondsAdjustmentforHedgingActivities Derivative [Table] Derivative [Table] Entity Small Business Entity Small Business Thereafter, WAIR % Long-term Debt Maturities, Repayments of Principal after Year Five, Weighted Average Interest Rate Long-term Debt Maturities, Repayments of Principal after Year Five, Weighted Average Interest Rate Cleared Exchange Cleared [Member] Derivative Hedged Item [Domain] Derivative Hedged Item [Domain] Derivative Hedged Item [Domain] Other operating expenses Other Cost and Expense, Operating Document Transition Report Document Transition Report Number of days a conventional mortage loan is considered past due Number of days a conventional mortage loan is considered past due Number of days a conventional mortage loan is considered past due Recently Adopted and Issued Accounting Guidance Accounting Standards Update and Change in Accounting Principle [Text Block] Short-Term Debt [Line Items] Short-Term Debt [Line Items] Bonds Repayments of Other Long-Term Debt Gross gains on sales Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Total cumulative fair-value hedging basis adjustments on hedged items Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Document Period End Date Document Period End Date Non-callable / non-putable Non-Callable [Member] Non-Callable [Member] Amortized cost of hedged items Hedged Liability, Fair Value Hedge Unamortized premiums Debt Instrument, Unamortized Premium Class A Common Class A [Member] Hedging Designation [Axis] Hedging Designation [Axis] Percent of Advances Par Value Held by Top Borrower Percent of Advances Par Value Held by Top Borrower Percent of Advances Par Value Held by Top Borrower Bonds Debt Instrument, Fair Value Disclosure Consolidated obligation discount notes Consolidated obligation discount notes Interest Expense, Other Short-Term Borrowings Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Derivative Contract Type [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Proceeds from issuance of capital stock Proceeds from Issuance of Common Stock Gross (losses) on sales Debt Securities, Available-for-Sale, Realized Loss Debt Securities, Trading, Gain (Loss) [Abstract] Debt Securities, Trading, Gain (Loss) [Abstract] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Affordable Housing Program assessments Affordable Housing Program Assessments Federal Home Loan Bank, Advances [Line Items] Federal Home Loan Bank, Advances [Line Items] Changes in net derivative and hedging activities Unrealized Gain (Loss) on Derivatives Range [Axis] Statistical Measurement [Axis] Net proceeds on derivative contracts with financing elements Payments for (Proceeds from) Hedge, Financing Activities Consolidated obligations: Unsettled CO bonds, at par Consolidated Obligation Bonds Member Consolidated Obligation Bonds Member Advances Federal Home Loan Bank Advances, Fair Value Disclosure Federal Home Loan Bank Advances, Fair Value Disclosure Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Available for Sale Securities Other Than MBS and ABS Other Than Mortgage Backed Securities [Member] Represents the total of non-mortgage backed securities, which may be issued by federal, state or local government and/or by other non-mortgage related entities. Due in 1 year through 5 years, Fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Proceeds from borrowings Proceeds from FHLBank Borrowings, Financing Activities Due after 4 through 5 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Rolling Year Five Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Due after 3 through 4 years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Four Commitments for standby bond purchases Financial Standby Letter of Credit [Member] Effect of Fair Value Hedge-Related Derivative Instruments Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Transaction Type [Axis] Transaction Type [Axis] Components of Net Gains (Losses) on Derivatives and Hedging Activities in Net Interest Income Derivative Instruments, Gain (Loss) [Table Text Block] Cash activity: Affordable Housing Program payments Payments for Affordable Housing Programs Level 1 Fair Value, Inputs, Level 1 [Member] Principal repayments Payments of FHLBank Borrowings, Financing Activities Office of Finance Office of Finance, Cost Assessed on Federal Home Loan Bank Related Party Transaction [Table] Related Party Transaction [Table] Advances (Note 4) Total Advances Federal Home Loan Bank, Advance Multifamily Multifamily [Member] Due in 1 year or less, Amortized cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Schedule of Realized Gain (Loss) Schedule of Realized Gain (Loss) [Table Text Block] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Consolidated obligation bonds Consolidated obligation bonds Interest Expense, Other Long-Term Debt Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Purchases from members Payment for Acquisition, Loan, Held-for-Investment For active fair-value hedging relationships Hedged Liability,Active Fair Value Hedge, Cumulative Increase (Decrease) Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk, active as of the balance sheet date. Gain (Loss) on Investments by Category [Axis] Debt Security Category [Axis] Due after 3 years through 4 years, amount Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four Available-for-sale Securities. Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Year of Contractual Maturity or Next Call Date Earlier of Contractual Maturity or Next Call Date [Member] Earlier of Contractual Maturity or Next Call Date Net impact on net interest income Gain (Loss) on Fair Value Hedges Recognized in Earnings Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Non-cash activities [Abstract] Non-cash activieis [Abstract] Non-cash activieis Fair-value hedging basis adjustments, net Federal Home Loan Bank, Advances, Valuation Adjustments for Hedging Activities Expire after one year Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring After One Year The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition, which expire after one year of the balance sheet date. Unused lines of credit - advances Commitments to Extend Credit [Member] Uncleared Over-the-Counter [Member] Mortgage loans held for portfolio: Payments for (Proceeds from) Loans and Leases [Abstract] Total CO bonds, par value Total CO bonds, par value Long-Term Debt, Gross Long-Term Debt, Gross Gain (Loss) on Securities Gain (Loss) on Securities [Table Text Block] Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Discount notes Unsettled discount notes, at par Consolidated Obligation Discount Notes [Member] Consolidated Obligation Discount Notes [Member] Bonds Proceeds from Issuance of Other Long-Term Debt Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Capital Equity [Text Block] Due in 5 years through 10 years, Fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Total mortgage loans held for portfolio Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Schedule of Fair Value, Off-balance Sheet Risks [Table] Fair Value, off-Balance-Sheet Risk [Table] Net change in: Increase Decrease In Investing Activities [Abstract] Increase (Decrease) in Investing Activities [Abstract] Mortgage loans held for portfolio, net (Note 5) Total mortgage loans held for portfolio, net2 Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Grantor trust assets Grantor Trust Assets Included in Other Assets, Fair Value Disclosure Grantor Trust Assets Included in Other Assets Due in 1 year or less, amount Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months Available-for-sale (AFS) Securities in an Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Due after 3 through 4 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Four For active fair-value hedging relationships Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease) Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, active as of the balance sheet date. Other liabilities Increase (Decrease) in Other Operating Liabilities Risk-based capital, required Federal Home Loan Bank, Risk-Based Capital, Required Payments for redemption/repurchase of capital stock Payments for Repurchase of Common Stock Due after 1 through 2 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Two Advances [Abstract] Advances [Abstract] Advances [Abstract] Interest-rate caps/floors Interest Rate Cap and Floor [Member] Interest Rate Cap and Floor [Member] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Consolidated obligations (Note 7): Consolidated obligations: Federal Home Loan Bank, Consolidated Obligations [Abstract] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Derivative [Line Items] Derivative [Line Items] Purchases of premises, software, and equipment Payments for (Proceeds from) Productive Assets Payments for matured and retired consolidated obligations: Repayments of Long-Term Debt [Abstract] Total retained earnings Retained Earnings (Accumulated Deficit) Estimated fair value of derivative liabilities Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Residential Portfolio Segment Residential Portfolio Segment [Member] Mandatorily Redeemable Capital Stock Mandatorily Redeemable Capital Stock [Table Text Block] Transaction [Domain] Transaction [Domain] Net amounts after netting adjustments and cash collateral Derivative Liability, Subject to Master Netting Arrangement, after Offset Financial Instrument [Axis] Major Types of Debt and Equity Securities [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 12 Months or More, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Purchases Payments to Acquire Held-to-Maturity Securities Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Mortgage loan purchases Mortgage Loans Purchased from Directors Financial Institutions Mortgage Loans Purchased from Directors Financial Institutions Number of regulatory capital requirements Number of Finance Agency Regulatory Capital Requirements Number of Finance Agency Regulatory Capital Requirements Less than 12 Months, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Simple variable-rate Adjustable Interest Rate [Member] Adjustable Interest Rate Balances with Directors' Financial Institutions Related Party Transactions, by Balance Sheet Grouping [Table Text Block] Related Party Transactions, by Balance Sheet Grouping [Table Text Block] Voluntary contributions to housing and community investment Voluntary contributions to housing and community investment Voluntary contributions to housing and community investment Statement [Table] Statement [Table] Derivative liabilities, net (Note 6) Derivative Liability, Total Derivative liabilities, net Derivative Liability Adjustments to reconcile net income to net cash (used in) provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Other, net Other Noninterest Expense Interest-rate related Interest Rate Contract [Member] Derivative instruments not meeting netting requirements Derivative Asset, Not Subject to Master Netting Arrangement Conventional Conventional Mortgage Loan [Member] Conventional Mortgage Loan [Member] Beginning Balance (in shares) Ending Balance (in shares) Shares, Issued Total Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Net proceeds from issuance of consolidated obligations: Proceeds from Issuance of Long-Term Debt [Abstract] Price alignment interest Price alignment interest Price alignment interest recognized in earnings during the period. Derivative, Collateral, Obligation to Return Securities That Cannot Be Sold or Repledged Derivative, Collateral, Obligation to Return Securities That Cannot Be Sold or Repledged Amount of obligation to return securities collateral that cannot be sold or repledged under master netting arrangements that have not been offset against derivative assets. Discount notes Repayments of Other Short-Term Debt Year 2 Financial Instrument Subject to Mandatory Redemption, Maturity, Year Two Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Amendment Flag Amendment Flag Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Accrued interest receivable Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Interest-bearing deposits Interest-Bearing Deposits in Banks and Other Financial Institutions Allowance for credit losses Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Fair-value hedging basis adjustments, net fhlb_FederalHomeLoanBankDiscountNoteAdjustmentsforHedgingActivities Amount of unrealized gain (loss) recognized in earnings for the cumulative period of the debt obligation in a fair value hedge, as offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective. Provision for (reversal of) credit losses Provision for (reversal of) credit losses Financing Receivable, Credit Loss, Expense (Reversal) Receivable [Domain] Receivable [Domain] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Reclassifications from OCI to net income: Reclassification from AOCI, Current Period, Tax [Abstract] Due in 1 year or less Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, in Next Rolling 12 Months Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Directors' Financial Institutions Director [Member] Estimated fair value of derivative assets Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Advances: Proceeds From Sale of Federal Home Loan Bank Advances [Abstract] WAIR% Long-term Debt, Rolling Maturity, WAIR Percent [Abstract] Long-term Debt, Rolling Maturity, WAIR Percent Banking Regulation, Total Capital [Abstract] Banking Regulation, Total Capital [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Regulatory permanent capital-to-asset ratio, required Regulatory Capital Ratio, Required Regulatory Capital Ratio, Required Net amounts after netting adjustments and cash collateral Derivative Asset, Subject to Master Netting Arrangement, after Offset Entity Tax Identification Number Entity Tax Identification Number Class B-2 Subclass B2 [Member] -- None. No documentation exists for this element. -- Fair Value - MBS Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Net gains on sales of AFS securities Net gains on sales of AFS securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Net change in fair value of AFS securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Unamortized discounts Unamortized discounts Debt Instrument, Unamortized Discount Net gains (losses) on trading securities that matured/sold during the period Debt Securities, Trading, Realized Gain (Loss) Disbursements Disbursements from Loans to Other Federal Home Loan Banks Common stock putable, par value per share (usd per share) Common Stock, Par or Stated Value Per Share Common stock issued (in shares) Common Stock, Shares, Issued Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Loans from other FHLBanks Loans from Other Federal Home Loan Banks Use of Estimates Use of Estimates, Policy [Policy Text Block] GSE multifamily MBS GSE MBS Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Non-cash activity: Purchases of investment securities, traded but not yet settled Purchases of investment securities, traded but not yet settled Purchases of investment securities, traded but not yet settled Loss Contingencies [Line Items] Loss Contingencies [Line Items] Unamortized swap termination fees associated with modified advances, net of deferred prepayment fees Unamortized Swap Termination Fees Associated With Modified Advances, Net of Deferred Prepayment Fees on Advances Unamortized Swap Termination Fees Associated With Modified Advances, Net of Deferred Prepayment Fees Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Schedule of Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Due after 3 through 4 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Four Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Total liabilities Liabilities Mortgage Backed Securities Collateralized Mortgage-Backed Securities [Member] Bonds Total CO bonds, carrying value Federal Home Loan Bank, Consolidated Obligations, Bonds Standby Letters of Credit Issuance Commitments Standby Letters of Credit Issuance Commitments [Member] A future dated irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation. Financing Receivables Financing Receivables [Text Block] Federal Home Loan Bank, Advances [Table] Federal Home Loan Bank, Advances [Table] Redemption/repurchase of capital stock (in shares) Stock Repurchased During Period, Shares Net gains (losses) on trading securities Net (gains) losses on trading securities Debt Securities, Trading, Gain (Loss), Total Debt Securities, Trading, Gain (Loss) Thereafter Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing after Rolling Year Five Due after 1 through 2 years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Two Offsetting Assets [Line Items] Offsetting Assets [Line Items] Proceeds from issuance of capital stock Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Leverage ratio, actual Federal Home Loan Bank, Leverage Ratio, Actual Unamortized concessions Unamortized concessions Unamortized Debt Issuance Expense Amortized cost of hedged items Hedged Asset, Fair Value Hedge Total advances, par value Federal Home Loan Bank, Advances, Weighted Average Interest Rate Class B issued and outstanding shares: 27,627,927 and 26,961,546 Class B issued and outstanding Common Stock, Other Value, Outstanding Proceeds from paydowns and maturities Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Capital Stock Common Stock [Member] Held-to-maturity securities (fair values of $6,003,341 and $5,979,915) (Note 3) Amortized cost Amortized Cost - HTM Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 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 Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Off-Balance Sheet Commitments Off-Balance Sheet Commitments [Table Text Block] Tabular disclosure of short-term or long-term contractual arrangements and obligations that, in accordance with GAAP, are not recognized on the balance sheet or may be recorded on the balance sheet in amounts that are different from the full contract or notional amount of the transactions. Pension benefits, net Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent