Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Investments, Debt and Equity Securities [Line Items] Debt and Equity Securities, FV-NI [Line Items] Schedule of Short-term Debt Schedule of Short-Term Debt [Table Text Block] AFS Securities - Amortized Cost, 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 Subclass B1 [Member] Subclass B1 [Member] Subclass B1 [Member] Discount notes Short-Term Debt, Fair Value Long-term Debt By Maturity Type [Domain] Long-term Debt By Maturity Type [Domain] Long-term Debt By Maturity Type [Domain] Cash Collateral received Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Advances Federal Home Loan Bank Advances, Fair Value Disclosure Fair value disclosure of the aggregate carrying amount of all Federal Home Loan Bank loans (advances). Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-Term Debt, Weighted Average Interest Rate, at Point in Time Real Estate [Domain] Real Estate [Domain] Fair Value by Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Interest Rate Swap [Member] Interest Rate Swap [Member] Net income Net income Net Income (Loss) Attributable to Parent, Net of Federal Home Loan Bank Assessments Net unrealized gains (losses) on AFS in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract] Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Rolling Year [Abstract] Federal Home Loan Bank, Advances, Floating Rate [Abstract] Federal Home Loan Bank, Advances, Floating Rate [Abstract] Mandatorily redeemable capital stock (Note 7) Balance, beginning of the period Balance, end of the period Total Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount Standby letters of credit fees Letters of credit fees Standby letters of credit fees Fees related to Standby letters of credit Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Retained earnings: Retained Earnings (Accumulated Deficit) [Abstract] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax 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.[Table Text Block] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Measurement Basis [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Due in 1 year or less Financial Instrument Subject to Mandatory Redemption, Maturity, Year One Leverage capital, Required Federal Home Loan Bank, Leverage Capital, Required Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] AFS - Non-MBS - Due after 10 years - Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Cash Collateral posted Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Fair Value Transfer, Policy Fair Value Transfer, Policy [Policy Text Block] Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Deposits Deposits, Fair Value Disclosure Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Gross Unrealized Holding Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Other assets Increase (Decrease) in Other Operating Assets Fixed-rate long-term single-family mortgages (1) Loans Receivable With Fixed Rates Of Interest Long Term [Member] A mortgage loan issued by a bank with a fixed rate of interest and a repayment period of more than 15 years [Member] Trading securities Debt Securities, Trading, and Equity Securities, FV-NI Originated Payments for FHLBank Advance, Investing Activities Cash dividends Dividends, Common Stock, Cash Total capital Total capital, beginning balance Total capital, ending balance AOCI 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 - Mortgage loans held for portfolio Accrued Interest - Advances Financing Receivable, Accrued Interest, after Allowance for Credit Loss Issuance of capital stock, shares Stock Issued During Period, Shares, New Issues Total liabilities and capital Liabilities and Equity Step-up Interest Rate [Member] [Member] Step-up Interest Rate [Member] [Member] Financial instruments with increasing fixed rates for specified intervals over the life of the instruments. Fair Value, Recurring [Member] Fair Value, Recurring [Member] Fixed-rate medium-term single-family mortgages (2) Loans Receivable With Fixed Rates Of Interest Medium Term [Member] A mortgage loan issued by a bank with a fixed rate of interest and a repayment period of 15 years or less [Member] Pension and Post Retirement Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Available-for-sale Securities Available-for-Sale Securities [Member] LIABILITIES AND CAPITAL Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Federal funds sold Interest Income, Federal Funds Sold Risk-Based Capital, Actual Federal Home Loan Bank, Risk-Based Capital, Actual Accounting Policies [Abstract] Accounting Policies [Abstract] Expiration Date 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. AFS - Fair Value - Total in Continuous Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position Capital [Table] Capital [Table] Capital [Table] Forward Contracts [Member] Commitments to purchase mortgage loans Forward Contracts [Member] Interest-bearing deposits (including $280 and $(269) (to) from other FHLBanks) Increase (Decrease) in Deposits with Other Federal Home Loan Banks Off-Balance-Sheet Credit Exposure, Policy Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Financial Instruments Subject to Mandatory Redemption, Past Contractual Redemption Date, Due to Outstanding Activity Financial Instruments Subject to Mandatory Redemption, Past Contractual Redemption Date, Due to Outstanding Activity Interest Rate Caps or Floors [Member] Interest Rate Caps or Floors [Member] Contract in which the cap writer, in return for a premium, agrees to limit, or cap, the cap holder's risk associated with an increase in interest rates or in which the floor writer, in return for a premium, agrees to limit the risk associated with a decline in interest rates based on a notional amount. Mortgage Receivable [Member] Mortgage Receivable [Member] Schedule of Short-term and Long-term Debt [Line Items] Schedule of Short-term and Long-term Debt [Line Items] Schedule of Short-term and Long-term Debt [Line Items] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities Liabilities [Abstract] Interest-bearing deposits Interest Income, Deposits with Financial Institutions Net shares reclassified to mandatorily redeemable capital stock, 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 Total amount of gains for the periods presented included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at June 30 Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings 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] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Gains/(Losses) on Hedged Item Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Change in unrealized gains (losses) for the period included in other comprehensive income (loss) for assets held at June 30 Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Federal Home Loan Bank, Advances, Borrowers With Outstanding Loan Balances Greater Than Ten Percent Federal Home Loan Bank, Advances, Borrowers With Outstanding Loan Balances Greater Than Ten Percent Federal Home Loan Bank, Advances, Borrowers With Outstanding Loan Balances Greater Than Ten Percent Interest Expense, Operating Interest Expense, Operating Deposits Interest Expense, Domestic Deposits Due after 3 years through 4 years Financial Instrument Subject to Mandatory Redemption, Maturity, Year Four Offsetting Liabilities [Table] Offsetting Liabilities [Table] 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 Total other comprehensive income (loss) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Total regulatory capital, Required Federal Home Loan Bank, Regulatory Capital, Required Due after 4 years through 5 years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Five 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 Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due after five years of the Balance Sheet date. Document Fiscal Period Focus Document Fiscal Period Focus Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Consolidated Obligation Bonds Unsecured Debt [Member] Financing Receivable, Excluding Accrued Interest, Nonaccrual Financing Receivable, Excluding Accrued Interest, Nonaccrual Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Due after 4 years through 5 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Five Hedging Relationship [Domain] Hedging Relationship [Domain] Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Advances Federal Home Loan Bank, Advances [Text Block] Government-guaranteed/insured loans US Government Agency Insured Loans [Member] Due after 2 years through 3 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Three Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] 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 unrealized gains (losses) on trading securities held at period-end Debt Securities, Trading, Unrealized Gain (Loss) Class of Financing Receivable [Axis] Portfolio Segment (Axis) Class of Financing Receivable [Axis] Total capital-to-asset ratio, Actual Federal Home Loan Bank, Regulatory Capital Ratio, Actual Loans Repaid by Other Federal Home Loan Banks Loans Repaid by Other Federal Home Loan Banks Total loans repaid by other Federal Home Loan Banks during the period Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Due after 1 year through 2 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Two Interest-bearing deposits maintained with FHLBank of Chicago Deposits with Other Federal Home Loan Banks AFS - Non-MBS - Due after one year through five 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 HTM securities - fair value HTM securities Debt Securities, Held-to-Maturity, Fair Value Schedule of Related Party Transactions, Mortgage Loans Schedule of Related Party Transactions, Mortgage Loans [Table Text Block] Tablular disclosure of the mortgage portfolio activity of related party members.[Table Text Block] Advances Interest income on advances (1) Interest Income, Federal Home Loan Bank Advances Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Debt Securities, Held-to-maturity [Table Text Block] Debt Securities, Held-to-Maturity [Table Text Block] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years Amount of financing receivable originated in current fiscal year and preceding four fiscal years. Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Principal Owner [Member] Principal Owner [Member] Federal Home Loan Bank, Advances, Option [Domain] Federal Home Loan Bank, Advances, Option [Domain] Total noninterest income (loss) Noninterest Income Capital Stock, Shares, Issued and Outstanding Common Stock, Shares, Outstanding REO - FV Real estate owned fair value disclosure Fair value as of the balance sheet date of real estate owned (real estate assets taken in settlement of troubled loans through surrender or foreclosure). Number Of Subclasses Of Capital Stock NumberOfSubclassesOfCapitalStock NumberOfSubclassesOfCapitalStock Interest Expense, Capital Securities Interest Expense, Capital Securities Gross Unrealized Holding Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Other Expense Noninterest Expense [Abstract] Cash and due from banks Cash and Due from Banks Investments Classified by Contractual Maturity Date [Table Text Block] Investments Classified by Contractual Maturity Date [Table Text Block] Trading securities Debt Securities, Trading Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Class of Financing Receivable [Domain] Financing Receivable Allowance [Domain] Class of Financing Receivable [Domain] Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income Gain (Loss) on Fair Value Hedges Recognized in Net Interest Income Total amount of gain (loss) derived from fair value hedges recognized in net interest income in the period. AFS - Non-MBS - Due in one year or less - Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Net change in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] TradedNotSettldInvestments TradedNotSettledInvestments TradedNotSettledInvestments -Represents traded but not yet settled investments purchased by the bank during the period. Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Total Variable Rate Federal Home Loan Bank, Advances, Floating Rate Retained Earnings Total Retained Earnings [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code 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] Income Statement [Abstract] Derivative assets (Note 5) Derivative assets Derivative assets Derivative assets Derivative Asset AFS - Fair Value - 12 months or longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Net change in: Increase (Decrease) in Investing Activities [Abstract] Increase (Decrease) in Investing Activities [Abstract] Other assets Other Assets Balance, beginning of period Balance, end of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Nonrecurring [Member] Fair Value, Nonrecurring [Member] AFS securities: Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale [Abstract] Accrued interest payable Increase (Decrease) in Interest Payable, Net Fixed Interest Rate [Member] Fixed Interest Rate [Member] Financial instruments with a fixed rate of interest. Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Off-balance Sheet Risks, with annual renewal option Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Letters of Credit, Annual Renewal Option Letters of Credit with annual renewal language that may permit the letter of credit to be renewed for an additional year with a maximum renewal period of five years. Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Derivative, Notional Amount Derivative, Notional Amount Single Family [Member] Single Family [Member] Single Family [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Advances [Abstract] Advances [Abstract] Note 6 - Advances [Abstract] Federal Home Loan Bank, Advances, Five Largest Borrowers Amount Outstanding Federal Home Loan Bank, Advances, Five Largest Borrowers Amount Outstanding Federal Home Loan Bank, Advances, Five Largest Borrowers Amount Outstanding City Area Code City Area Code Due in 1 year or less Federal Home Loan Bank, Advance, Floating Rate, Year One Federal Home Loan Bank, Advances, Five Largest Borrowers, Percent of Total Federal Home Loan Bank, Advances, Five Largest Borrowers, Percent of Total Federal Home Loan Bank, Advances, Five Largest Borrowers, Percent of Total Other, net Noninterest Income, Other Operating Income Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Due after 4 years through 5 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Five Schedule of Trading Securities and Other Trading Assets [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Par amounts for the FHLBanks' outstanding Consolidated Obligation Obligation with Joint and Several Liability Arrangement, Amount Outstanding Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Advances [Member] Advances [Member] This item represents Federal Home Loan Bank loans (advances).[Member] Proceeds Proceeds from Sale and Maturity of Held-to-Maturity Securities 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 Sale of Debt Securities, Available-for-Sale Proceeds from Sale of Debt Securities, Available-for-Sale AFS securities, net; amortized cost of $20,573,450 and $18,171,361 Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Price Alignment Amount Price Alignment Amount [Member] Price Alignment Amount Due in 1 year or less Federal Home Loan Bank, Advance, Fixed Rate, Year One Subsequent Event [Member] Subsequent Event [Member] Other liabilities Other Liabilities Net interest income Interest Income (Expense), Operating Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Net gains (losses) on investment securities (Note 2) Gain (Loss) on Investments Standby Letters of Credit Issuance Commitments [Member] Standby Letters of Credit Issuance Commitments [Member] An future dated irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation. Derivative Liability, Fair Value, Gross Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Equity Components [Axis] Equity Components [Axis] Standby Letters of Credit Standby letters of credit outstanding (1) (2) Standby Letters of Credit [Member] Mortgage loans held for Portfolio [Table] Loans and Leases Receivable Disclosure [Table] Background Information Nature of Operations [Text Block] Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate Long-term Debt, Maturities, Repayments of Principal in Year Three, Weighted Average Interest Rate Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due two to three years of the Balance Sheet date. 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 Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due one to two years of the Balance Sheet date. Deposits Deposits, Domestic Interest-bearing deposits (including $280 and $(269) (to) from other FHLBanks) Proceeds from (Payments for) in Interest-Bearing Deposits in Banks Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Entity Address, State or Province Entity Address, State or Province Total interest income Interest and Dividend Income, Operating Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Fair Value Measurement, Policy Fair Value Measurement, Policy [Policy Text Block] MPF & BOB Loans , Net of Allowance Mortgage loans held for portfolio Loans Receivable, Fair Value Disclosure Related Party [Domain] Related and Nonrelated Parties [Domain] Derivative Instrument [Axis] Derivative, by Nature [Axis] Derivative Instrument [Axis] U.S. obligations single-family Single Family, Mortgage-backed Securities, Other US Obligations [Member] 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. Non-MBS [Member] 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. Other comprehensive income (loss): Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Total capital-to-asset ratio, Required Regulatory Capital Ratio, Required Regulatory capital ratio requirement as defined in the regulations. Cash dividends paid Payments of Ordinary Dividends, Common Stock Entities [Table] Entities [Table] Number of Federal Home Loan Banks Number of Federal Home Loan Banks The number of Federal Home Loan Banks which comprise the Federal Home Loan Bank System. Entity [Domain] Entity [Domain] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Consolidated Obligations Bonds [Member] Unsettled consolidated obligation bonds, at par Consolidated Obligations Bonds [Member] Amount of joint and several obligations consisting of bonds issued by Federal Home Loan Banks (FHLBanks) [Member] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Hedged Asset, Active Fair Value Hedge, Cumulative Increase (Decrease) 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. Entity Interactive Data Current Entity Interactive Data Current Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Five Due after 2 years through 3 years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Three Reported Value Measurement [Member] 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 (AFS) 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] Net Interest Settlements [Member] Net Interest Settlements [Member] Net interest settlements of Economic Hedges [Member] Finance Agency Regulator Expenses, Cost Assessed on Federal Home Loan Bank HTM - Accrued Interest Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss Total other expense Noninterest Expense Total investment securities Marketable Securities 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] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] U.S. Treasury obligations U.S. Treasury obligations US Treasury Securities [Member] Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability,ActiveFair 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. Federal Home Loan Bank, Advances, Maturity, Rolling Year, Par Value [Abstract] 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 noninterest income (loss): Noninterest Income [Abstract] Derivatives Not Designated As Hedging Before Price Alignment Derivatives Not Designated As Hedging Before Price Alignment [Member] Derivatives Not Designated As Hedging Before Price Alignment Purchases, issuances, sales, and settlements: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract] Schedule of Advances Classified by Contractual Maturity Date Federal Home Loan Bank, Advances [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Loans Repaid to Other Federal Home Loan Banks Loans Repaid to Other Federal Home Loan Banks Loans Repaid to Other Federal Home Loan Banks Repurchase/redemption of capital stock Stock Repurchased During Period, Value Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Nonperforming Financial Instruments [Member] Nonperforming Financial Instruments [Member] Retained Earnings, Unrestricted Retained Earnings, Unappropriated [Member] Entity Central Index Key Entity Central Index Key Schedule of Maturities of Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Net gains (losses) on derivatives (Note 5) Net gains (losses) related to derivatives not designated as hedging instruments 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] Callable [Member] Callable [Member] A debt obligation not collateralized by pledge, mortgage or other lien in the entity's assets and is callable Repaid Proceeds from FHLBank Advance, Investing Activities Advances: ProceedsFromSaleOfFederalHomeLoanBankAdvances [Abstract] ProceedsFromSaleOfFederalHomeLoanBankAdvances [Abstract] Financing Receivable Credit Quality Indicators [Table Text Block] Financing Receivable Credit Quality Indicators [Table Text Block] Total Par Value Total Par Value Federal Home Loan Bank, Advances, Par Value Interest-bearing deposits Interest-bearing Deposits, Fair Value Disclosure Interest-bearing Deposits, Fair Value Disclosure Schedule of Trading Securities Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Hedging adjustments Loans and Leases Receivable, Hedging Basis Adjustment Reflects the cumulative amount of hedging adjustments that are being amortized into income as an adjustment of yield. Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Other investing activities, net Payment for (Proceeds from) Other Investing Activity Subsequent Event Type [Axis] Subsequent Event Type [Axis] Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) ASSETS Assets [Abstract] Due after 2 years through 3 years Financial Instrument Subject to Mandatory Redemption, Maturity, Year Three Other Contract [Member] Other Contract [Member] Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Estimated Fair Values Fair Value Disclosures [Text Block] Capital (Note 7) Stockholders' Equity Attributable to Parent [Abstract] Equity, Attributable to Parent [Abstract] MPF loans Loans And Leases Receivable, Unpaid Principal Balance Reflects the aggregate unpaid principal balance of all categories of loans and leases held in portfolio. HTM securities: Proceeds from Sale and Maturity of Held-to-Maturity Securities [Abstract] Percent of Average Balance of Outstanding Consolidated Obligations Required per the Joint Capital Enhancement Agreement For Each Previous Quarter Percent of Average Balance of Outstanding Consolidated Obligations Required per the Joint Capital Enhancement Agreement For Each Previous Quarter Represents the percentage of Federal Home Loan Bank's (FHLBank's) average balance of outstanding consolidated obligations necessary to equal the restricted retained earnings minimum. Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Financial Asset, 30 to 59 Days Past Due [Member] Financial Asset, 30 to 59 Days Past Due [Member] Schedule of Short-term and Long-term Debt [Table] Schedule of Short-term and Long-term Debt [Table] Schedule of Short-term and Long-term Debt [Table] Mortgage Loans held for portfolio [Line Items] Loans and Leases Receivable Disclosure [Line Items] Derivative Liability, Not Subject to Master Netting Arrangement Derivative Liability, Not Subject to Master Netting Arrangement Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Retained Earnings, Restricted Retained Earnings, Appropriated [Member] Maximum Commitment Period Commitments to purchase mortgage loans, maximum term Commitments to purchase mortgage loans are generally for periods not exceeding 60 days. Federal funds sold Increase (Decrease) in Federal Funds Sold Depreciation and amortization Depreciation, Amortization and Accretion, Net Held-to-maturity (HTM) securities Interest Income, Debt Securities, Held-to-Maturity Entity Registrant Name Entity Registrant Name Rollover (weekly/monthly) advance Product Rollover (weekly-monthly) Advance Product [Member] Open RepoPlus Advance Product [Member] Unrestricted Unrestricted Retained Earnings, Unappropriated Mandatorily redeemable capital stock and other borrowings Interest Expense, Other Schedule of Long-term Debt by Call Feature Schedule of Long-Term Debt Instruments [Table Text Block] Compensation and benefits Labor and Related Expense Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two Private label MBS [Member] Mortgage-Backed Securities, Issued by Private Enterprises [Member] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Related Party Transactions, Income Statement Related Party Transactions, Income Statement [Table Text Block] Tabular summary disclosure of Statement of Income effects corresponding to the related party member balances [Table Text Block] Letter of Credit Renewal Period Letter of credit renewal period Letter of Credit which are permitted to be renewed annually. Related Party Transaction [Line Items] Related Party Transaction [Line Items] Securities Purchased under Agreements to Resell, Fair Value Disclosure Securities Purchased under Agreements to Resell, Fair Value Disclosure Fair value as of the balance sheet date of funds outstanding loaned in the form of security resale agreements. Document Quarterly Report Document Quarterly Report Due after 4 years through 5 years Financial Instrument Subject to Mandatory Redemption, Maturity, Year Five AFS - Fair Value - Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total assets at fair value Assets, Fair Value Disclosure Provision (reversal) for credit losses Provision for Loan, Lease, and Other Losses Federal Funds Sold ( Note 2) Federal Funds Sold Derivative Item Hedged [Domain] Derivative Item Hedged [Domain] Derivative Item Hedged [Domain] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] 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 obligations US Government-sponsored Enterprises Debt Securities [Member] Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment Derivative Asset, Net Fair Value Amount, After Offsetting Adjustment Fair value after effects of master netting arrangements and collateral, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Accounting Standards Update and Change in Accounting Principle [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Net change in fair value of AFS 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 Transactions, by Related Party [Axis] Related and Nonrelated Parties [Axis] Letters of credit Letters of Credit Outstanding, Amount Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] AFS - Non-MBS - Due after five through ten years - Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost 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 Offsetting Assets Offsetting Assets [Table Text Block] Total consolidated obligations Federal Home Loan Bank, Consolidated Obligations Schedule of Short-term Debt [Table] Short-Term Debt [Table] Other adjustments Other Noncash Income (Expense) Debt Instrument, Face Amount Debt Instrument, Face Amount Thereafter Federal Home Loan Bank, Advance, Fixed Rate, after Year One Payments for repurchase/redemption of mandatorily redeemable capital stock Redemption/repurchase of mandatorily redeemable capital stock Repayments of Mandatory Redeemable Capital Securities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Estimate of Fair Value, Fair Value Disclosure Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Offsetting Assets [Table] Offsetting Assets [Table] Cumulative Basis Adjustments for Fair Value Hedges [Abstract] Cumulative Basis Adjustments for Fair Value Hedges [Abstract] Cumulative Basis Adjustments for Fair Value Hedges [Abstract] AHP payable Affordable Housing Program Obligation Total regulatory capital, Actual Federal Home Loan Bank, Regulatory Capital, Actual Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Discount notes Proceeds from Other Short-Term Debt Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five Capital stock reclassified to mandatorily redeemable capital stock Capital stock reclassified to mandatorily redeemable capital stock Capital stock subject to mandatory redemption reclassified from capital Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value Commitments to fund additional advances Loan Origination Commitments [Member] Thereafter Federal Home Loan Bank, Advance, Floating Rate, after Year One Financial Instruments [Domain] Financial Instruments [Domain] Accumulated Other Comprehensive Income (Loss) (AOCI) Accumulated Other Comprehensive Income (Loss), before Federal Home Loan Bank Assessments Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate Long-term Debt, Maturities, Repayments of Principal in Year Four, Weighted Average Interest Rate Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due three to four years of the Balance Sheet date. Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Short-term Debt [Member] Short-Term Debt [Member] Rollover -weekly/monthly advance product Outstanding Line of Credit Facility, Remaining Borrowing Capacity Discount notes Discount Notes, Book value Federal Home Loan Bank, Consolidated Obligations, Discount Notes Federal funds sold 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] Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Proceeds Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Minimum Minimum [Member] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Due after 2 years through 3 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Three Net Unrealized Gains(Losses) AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Non Callable [Member] Non Callable [Member] A debt obligation not collateralized by pledge, mortgage or other lien in the entity's assets and is neither callable or putable Consolidated Obligations, Discount Notes Unsettled consolidated obligation discount notes, at par [Member] Federal Home Loan Bank, Consolidated Obligations, Discount Notes [Member] Amount of joint and several obligations consisting of discount notes issued by Federal Home Loan Banks (FHLBanks) [Member] Variable interest rate [Member] Variable interest rate [Member] Financial Interest rate with variable interest rate Subclass B2 [Member] Subclass B2 [Member] Subclass B2 [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Purchases Payments to Acquire Debt Securities, Available-for-Sale Total comprehensive income (loss) Comprehensive Income Comprehensive Income (Loss), Net of Federal Home Loan Bank Assessments, Attributable to Parent Consolidated Obligations Debt Disclosure [Text Block] State or local agency obligations [Member] US States and Political Subdivisions Debt Securities [Member] Accrued interest payable Interest Payable Expiration Date 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. Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Financing Receivable, 90 Days or More Past Due, Still Accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Gains/(Losses) on Derivative Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Mortgage loans held for portfolio Interest Income on MPF loans 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 Discount Notes, Weighted Average Interest Rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time FHLBank of Chicago [Member] FHLBank of Chicago [Member] The Federal Home Loan Bank of Chicago [Member] Commitments and contingencies (Note 10) Commitments and Contingencies Trading securities Interest Income, Debt Securities, Trading, Operating Due in 1 year or less Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Next Rolling 12 Months Deferred prepayment fees Federal Home Loan Bank, Advances, Discount Derivative [Table] Derivative [Table] Entity Small Business Entity Small Business Exchange Cleared [Member] Exchange Cleared [Member] Proceeds Proceeds from Sale and Maturity, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Other operating Other Cost and Expense, Operating Investment securities: (Note 2) Marketable Securities [Abstract] Document Transition Report Document Transition Report Mortgage Loans in Process of Foreclosure, Amount Mortgage Loans in Process of Foreclosure, Amount Accounting Adjustments, Changes in Accounting Principle and Recently Issued Accounting Standards and Interpretations 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 Debt Securities, Available-for-Sale, Realized Gain Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Document Period End Date Document Period End Date Hedged Liability, Fair Value Hedge Hedged Liability, Fair Value Hedge Bond premiums Debt Instrument, Unamortized Premium Nature of Operations [Line Items] Nature of Operations [Line Items] Nature of Operations [Line Items] Financial Asset, 60 to 89 Days Past Due [Member] Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Bonds Debt Instrument, Fair Value Disclosure Premiums Loans and Leases Receivable, Unamortized Premiums Reflects the cumulative amount of premiums over the face amount of loans that are being amortized into income as an adjustment of yield. Consolidated obligations - discount notes Consolidated obligations - discount notes Interest Expense, Other Short-Term Borrowings Scenario [Axis] Scenario [Axis] Document Type Document Type Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Derivative, Name [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Proceeds from issuance of capital stock Proceeds from Issuance of Common Stock Schedule of Dividends Paid [Table Text Block] Schedule of Dividends Paid [Table Text Block] Schedule of Dividends Paid Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Affordable Housing Program (AHP) assessment Affordable Housing Program Assessments Federal Home Loan Bank Advances Federal Home Loan Bank, Advances [Line Items] Federal Home Loan Bank, Advances [Line Items] Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] Net change in derivative and hedging activities Unrealized Gain (Loss) on Derivatives Federal Home Loan Bank, Advances, Option [Axis] Federal Home Loan Bank, Advances, Option [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] Proceeds from FHLBank Borrowings, Financing Activities Proceeds from FHLBank Borrowings, Financing Activities AFS - Non-MBS - Due after one year through five years - Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Financing Receivable, Originated, More than Five Years before Current Fiscal Year Financing Receivable, Originated, More than Five Years before Current Fiscal Year Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Servicing fee expense Fees and Commissions, Mortgage Banking and Servicing Due after 3 years through 4 years Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Four Document Information [Line Items] Entity Information [Line Items] 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 Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due four to five years of the Balance Sheet date. Financing Receivable, Percent Past Due Financing Receivable, Percent Past Due Schedule Of Derivative Instruments By Type Gain Loss In Statement Of Financial Performance Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Transaction Type [Axis] Transaction Type [Axis] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Office of Finance Office of Finance, Cost Assessed on Federal Home Loan Bank Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Advances (Note 3) Total book value Advances Federal Home Loan Bank, Advance Multifamily [Member] Multifamily [Member] Multifamily [Member] Discounts Loans and Leases Receivable, Unamortized Discounts Reflects the cumulative amount of discounts from the face amount of loans that are being amortized into income as an adjustment of yield. AFS - Non-MBS - Due in one year or less - Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Proceeds from Sales and Gross Gains and Losses on AFS Securities 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 obligations - bonds Interest Expense, Other Long-Term Debt Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Purchases Payment for Acquisition, Loan, Held-for-Investment Debt Security Category [Axis] Debt Security Category [Axis] Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Number of Finance Agency Regulatory Capital Requirements Number of Finance Agency Regulatory Capital Requirements Number of Finance Agency Regulatory Capital Requirements (Provision) benefit for credit losses Provision for Other Credit Losses Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Joint Capital Enhancement Agreement Percentage Joint Capital Enhancement Agreement, Percentage Represents percentage of net income each FHLBank will contribute to a restricted retained earnings account until the balance of that account equals at least one percent of FHLBank's average balance of outstanding consolidated obligations. Net Interest Settlements on FV Hedges Net Interest Settlements on FV Hedges Net Interest Settlements on FV Hedges Hedging adjustments Federal Home Loan Bank, Advances, Valuation Adjustments for Hedging Activities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Over the Counter [Member] Over-the-Counter [Member] Schedule of Mortgage Loans Held for Portfolio Mortgage Loans Held for Portfolio [Table Text Block] Tabular disclosure of mortgage loans held for portfolio (can include unpaid principal balance by collateral or guarantee type, premiums, discounts, deferred loan costs and hedging adjustments). Mortgage loans held for portfolio: Payments for (Proceeds from) Loans and Leases [Abstract] Long-term Debt, Gross Long-Term Debt, Gross Net Gains (Losses) on Trading Securities Gain (Loss) on Securities [Table Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Federal Home Loan Bank Advances Federal Home Loan Bank Advances [Member] Federal Home Loan Bank, Advances, Fixed Rate [Abstract] Federal Home Loan Bank, Advances, Fixed Rate [Abstract] Bonds Proceeds from Issuance of Other Long-Term Debt Capital [Line Items] Capital [Line Items] Capital [Line Items] Related Party Transaction, Definition Of Related Party, Capital Stock, Percent Related Party Transaction, Definition Of Related Party, Capital Stock, Percent Related Party Transaction, Definition Of Related Party, Capital Stock, Percent Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Equity Equity [Text Block] AFS - Non-MBS - Due after five through ten years - Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Mortgage loans held for portfolio, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Due after 3 years through 4 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Four Other liabilities Increase (Decrease) in Other Operating Liabilities Risk-Based Capital, Required Federal Home Loan Bank, Risk-Based Capital, Required Interest Rate Payment Term By Interest Rate Type [Axis] Interest Rate Payment Term By Interest Rate Type [Axis] Interest Rate Payment Term By Interest Rate Type [Axis] Leverage ratio - Required Leverage Ratio, Required Leverage ratio requirement as defined in the regulations. Payments for repurchase/redemption of capital stock Payments for Repurchase of Common Stock Due after 1 year through 2 years Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, in Rolling Year Two Consolidated obligations: (Note 6) Federal Home Loan Bank, Consolidated Obligations [Abstract] Entity Current Reporting Status Entity Current Reporting Status Long Debt, Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate Long Debt, Maturities, Repayments of Principal in Next Twelve Months, Weighted Average Interest Rate Weighted average interest rate of long-term debt outstanding calculated at point in time applicable to long-debt maturities which are due within one year of the Balance Sheet date. Receivables [Abstract] Receivables [Abstract] Derivative [Line Items] Derivative [Line Items] Payments for maturing and retiring consolidated obligations Repayments of Long-Term Debt [Abstract] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Total retained earnings Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit) Fixed rate – overnight Federal Home Loan Bank Advances, Fixed Rate Overnight Amount of Federal Home Loan Bank advances having fixed interest rates and overnight maturities. Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Mortgage loans held for portfolio, net Residential Portfolio Segment [Member] Schedule of Mandatorily Redeemable Capital Stock by Maturity Date Mandatorily Redeemable Capital Stock [Table Text Block] Transaction [Domain] Transaction [Domain] Financial Instrument [Axis] Financial Instrument [Axis] Derivative Item Hedged [Axis] Derivative Item Hedged [Axis] Information by type of derivative item hedged. Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Federal funds sold Federal Funds Sold, Fair Value Disclosure Fair value disclosure of the amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements. AFS - Unrealized Losses - 12 months or longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Purchases Payments to Acquire Held-to-Maturity Securities Schedule of Interest Rate Payment Terms For Investments [Table Text Block] Schedule of Interest Rate Payment Terms For Investments [Table Text Block] Tabular disclosure of interest rate payment terms for investments. Class of Stock [Axis] Class of Stock [Axis] Current Fiscal Year End Date Current Fiscal Year End Date AFS - Unrealized Losses - Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Subsequent Event Type [Domain] Subsequent Event Type [Domain] Voluntary Contribution Expense Voluntary Contribution Expense Voluntary Community Contributions other expense Statement [Table] Statement [Table] Derivative liabilities (Note 5) Derivative liabilities Derivative liabilities Derivative Liability Adjustments to reconcile net income to net cash provided by(used in) 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] Related Party Transactions, by Balance Sheet Grouping Related Party Transactions, by Balance Sheet Grouping [Table Text Block] Tabular disclosure of related party member balances of specified balance sheet items.[Table Text Block] Derivative Asset, Not Subject to Master Netting Arrangement Derivative Asset, Not Subject to Master Netting Arrangement Conventional MPF Loan [Member] Conventional Mortgage Loan [Member] Balance, shares beginning balance Balance, shares ending balance Shares, Issued AFS - Unrealized Losses - Total in Continuous Loss Position 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] Discount notes Repayments of Other Short-Term Debt Due after 1 year through 2 years Financial Instrument Subject to Mandatory Redemption, Maturity, Year Two Dividends Cash, Annualized Rate Dividends Cash, Annualized Rate Dividends Cash, Annualized Rate Rollforward of Level 3 Assets and Liabilities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Number Of Top Advances Borrowers Number Of Top Advances Borrowers Number Of Top Advances Borrowers Amendment Flag Amendment Flag Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Available-for-Sale - Accrued Interest Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Nature of Operations [Table] Nature of Operations [Table] Nature of Operations [Table] Financing Receivable, Past Due [Table Text Block] Financing Receivable, Past Due [Table Text Block] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Interest-bearing deposits (Note 2) Interest-Bearing Deposits in Banks and Other Financial Institutions Allowance for credit losses on mortgage loans MPF - Allowance for Credit Loss - Beginning Balance MPF -Allowance for Credit Loss - Ending Balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment Derivative Laibility, Net Fair Value Amount, After Offsetting Adjustment Fair value after effects of master netting arrangements and collateral, of a financial liability or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Receivable [Domain] Receivable [Domain] 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] Long-term Debt By Maturity Type [Axis] Long-term Debt By Maturity Type [Axis] Long-term Debt By Maturity Type [Axis] Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Interest Rate Type [Domain] Interest Rate Type [Domain] Interest Rate Type [Domain] AFS - Non-MBS - Due after 10 years - Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Banking Regulation, Total Capital [Abstract] Banking Regulation, Total Capital [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Entity Tax Identification Number Entity Tax Identification Number Scenario [Domain] Scenario [Domain] Net realized (gains) loss from sales of AFS securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Bond discounts Debt Instrument, Unamortized Discount Net gains (losses) on trading securities sold/matured during the period Debt Securities, Trading, Realized Gain (Loss) Federal Home Loan Bank, Advances, by Interest Rate Type [Abstract] Federal Home Loan Bank, Advances, Par Value, by Interest Rate Type [Abstract] Capital Stock, Par value Per Share Capital stock, Par value Per Share Common Stock, Par or Stated Value Per Share Fair value hedging adjustments Federal Home Loan Bank, Consolidated Obligations, Bonds, Adjustment for Hedging Activities 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. Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Loans from Other Federal Home Loan Banks Loans from Other Federal Home Loan Banks Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements GSE MBS [Member] Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Fair Value Measurements Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Earlier of Contractual Maturity or Next Call Date [Member] [Member] Earlier of Contractual Maturity or Next Call Date [Member] [Member] Debt obligation categorized by earlier of contractual maturity or next call date. Total Fixed Rate Federal Home Loan Bank, Advances, Fixed Rate Financial Asset, Not Past Due Financial Asset, Not Past Due [Member] Due after 3 years through 4 years Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Four Balance, beginning of period Balance, end of period Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Securities Purchased under Agreements to Resell ( Note 2) 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 MBS [Member] Collateralized Mortgage-Backed Securities [Member] Bonds Total consolidated obligation bonds Federal Home Loan Bank, Consolidated Obligations, Bonds Mortgage Loans Held for Portfolio Financing Receivables [Text Block] Federal Home Loan Bank, Advances [Table] Federal Home Loan Bank, Advances [Table] Common Stock, Value, Outstanding Common Stock, Value, Outstanding Repurchase/redemption of capital stock, shares Stock Repurchased During Period, Shares Proceeds (includes $0, and $346,659 from sales) Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Net change in fair value adjustments on trading securities Net gains (losses) on trading securities Debt Securities, Trading, Gain (Loss) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Asset Class [Domain] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Thereafter Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing after Rolling Year Five Due after 1 year through 2 years Federal Home Loan Bank Advances, Weighted Average Interest Rate, Maturing in Rolling Year Two Accretion of credit losses in interest income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Offsetting Assets [Line Items] Offsetting Assets [Line Items] 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 Concession fees Unamortized Debt Issuance Expense Hedged Asset, Fair Value Hedge Hedged Asset, Fair Value Hedge Total par value, Weighted Average Interest Rate Federal Home Loan Bank, Advances, Weighted Average Interest Rate Capital stock - Class B putable ($100 par value) issued and outstanding shares 39,031 and 22,922, respectively Capital stock Common Stock, Other Value, Outstanding Consolidated Obligations Discount Notes Consolidated Obligations Discount Notes [Member] Amount of joint and several obligations consisting of discount notes issued by Federal Home Loan Bank. Capital Stock - Putable Common Stock [Member] AFS Securities Debt Securities, Available-for-Sale HTM securities; fair value of $961,993 and $1,099,599 HTM - Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Entity Home Country ISO 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] Pension and post-retirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent