Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement [Line Items] Statement [Line Items] Held-to-maturity Securities Pledged as Collateral Held-to-maturity Securities Pledged as Collateral Bonds at fair value under fair value option Long-term Debt, Fair Value Common stock, par value Common Stock, Par or Stated Value Per Share Capital stock Class B, shares issued Common Stock, Shares, Issued Capital stock Class B, shares outstanding Common Stock, Shares, Outstanding Held-to-Maturity Securities at fair value Held-to-maturity Securities, Fair Value Document and Entity Information [Abstract] Document and Entity Information Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Document and Entity Information [Line Items] Document and Entity Information [Line Items] Document and Entity Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Recently Issued Accounting Standards and Interpretations [Abstract] Recently Issued Accounting Standards and Interpretations [Abstract] Description of New Accounting Pronouncements Not yet Adopted [Text Block] Income Statement [Abstract] INTEREST INCOME: Interest and Dividend Income, Operating [Abstract] Advances Interest Income, Federal Home Loan Bank Advances Prepayment fees on Advances, net Prepayment Fees on Advances, Net Interest-bearing deposits Interest Income, Deposits with Financial Institutions Securities purchased under agreements to resell Interest Income, Securities Purchased under Agreements to Resell Federal funds sold Interest Income, Federal Funds Sold Trading securities Interest and Dividend Income, Securities, Trading or Measured at Fair Value Available-for-sale securities Interest and Dividend Income, Securities, Available-for-sale Held-to-maturity securities Interest and Dividend Income, Securities, Held-to-maturity Mortgage loans held for portfolio Interest and Fee Income, Loans, Consumer, Real Estate Loans to other FHLBanks Interest Income, Loans to Other Federal Home Loan Banks Total interest income Interest and Dividend Income, Operating INTEREST EXPENSE: Interest Expense [Abstract] Consolidated Obligations - Discount Notes Interest Expense, Other Short-term Borrowings Consolidated Obligations - Bonds Interest Expense, Other Long-term Debt Deposits Interest Expense, Deposits Loans from other FHLBanks Interest Expense, Loans from Other Federal Home Loan Banks Mandatorily redeemable capital stock Interest Expense, Capital Securities Total interest expense Interest Expense NET INTEREST INCOME Interest Income (Expense), Net Provision for credit losses Provision for Loan Losses Expensed NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Interest Income (Expense), after Provision for Loan Loss OTHER (LOSS) INCOME: Noninterest Income [Abstract] Service fees Fees and Commissions, Correspondent Clearing Net (losses) gains on trading securities Net Realized and Unrealized Gain (Loss) on Trading Securities Net realized losses from sale of available-for-sale securities Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Net realized gains from sale of held-to-maturity securities Held-to-maturity Securities, Sold Security, Realized Gain (Loss), Excluding Other than Temporary Impairments Net losses on Consolidated Obligation Bonds held under fair value option Fair Value, Option, Changes in Fair Value, Gain (Loss) Net gains (losses) on derivatives and hedging activities Gain (Loss) on Derivative Instruments, Net, Pretax Other, net Noninterest Income, Other Operating Income Total other (loss) income Noninterest Income OTHER EXPENSE: Noninterest Expense [Abstract] Compensation and benefits Labor and Related Expense Other operating Other Cost and Expense, Operating Finance Agency Regulator Expenses, Cost Assessed on Federal Home Loan Bank Office of Finance Office of Finance, Cost Assessed on Federal Home Loan Bank Other Other Noninterest Expense Total other expense Noninterest Expense INCOME BEFORE ASSESSMENTS Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Affordable Housing Program Affordable Housing Program Assessments REFCORP Congressionally Mandated Federal Home Loan Bank Assessments Total assessments Federal Home Loan Bank Assessments NET INCOME Net Income (Loss) Attributable to Parent Basis of Presentation [Abstract] Basis of Presentation Heading Basis of Accounting [Text Block] Basis of Accounting [Text Block] Transactions with Stockholders [Abstract] Transactions with Stockholders [Abstract] Transactions with Stockholders [Text Block] Transactions with Stockholders [Text Block] Transactions with Stockholders Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Note Disclosure [Text Block] Segment Reporting, Measurement Disclosures [Abstract] Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Other Than Temporary Impairment Analysis [Abstract] Other-than-Temporary Impairment Analysis [Abstract] Other than Temporary Impairment, Credit Losses Recognized in Earnings Disclosure [Text Block] This item represents the entire disclosure related to the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income. Available-for-sale Securities, Balance Sheet, Reported Amounts [Abstract] Available for sale Securities Disclosure [Text Block] This item represents the entire disclosure related to available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. Statement of Cash Flows [Abstract] OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Amortization and Accretion, Net Change in net fair value adjustment on derivative and hedging activities Unrealized Gain (Loss) on Derivatives Net change in fair value adjustments on trading securities Trading Securities, Change in Unrealized Holding Gain (Loss) Net change in fair value adjustments on Consolidated Obligation Bonds held at fair value Increase (Decrease) in Fair Value Adjustments on Assets and Liabilities Carried at Fair Value under Fair Value Option Other adjustments Other Noncash Income (Expense) Net change in: Increase (Decrease) in Operating Capital [Abstract] Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Other assets Increase (Decrease) in Other Operating Assets Accrued interest payable Increase (Decrease) in Interest Payable, Net Other liabilities Increase (Decrease) in Other Operating Liabilities Total adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Net change in: Increase (Decrease) in Investing Activities [Abstract] Increase (Decrease) in Investing Activities [Abstract] Interest-bearing deposits Proceeds from (Payments for) in Interest-bearing Deposits in Banks Securities purchased under agreements to resell Proceeds from (Payments for) Securities Purchased under Agreements to Resell Federal funds sold Increase (Decrease) in Federal Funds Sold Premises, software, and equipment Payments for (Proceeds from) Productive Assets Trading securities: Payments to Acquire Investments [Abstract] Net (increase) decrease in short-term Payments For Proceeds From Short Term Trading Securities The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term trading securities with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. Proceeds from maturities of long-term Proceeds from Sale and Maturity of Trading Securities Held-for-investment Available-for-sale securities: Payments to Acquire Available-for-sale Securities [Abstract] Net decrease in short-term Payments For Proceeds From Short Term Available For Sale Securities The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term available-for-sale securities with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Held-to-maturity securities: Proceeds from Sale and Maturity of Held-to-maturity Securities [Abstract] Net increase in short-term Payments For Proceeds From Short Term Held To Maturity Securities The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term held-to-maturity securities with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Proceeds from maturities of long-term Proceeds from Sale and Maturity of Held-to-maturity Securities Proceeds from sale of long-term Proceeds from Sale of Held-to-maturity Securities Purchases of long-term Payments to Acquire Held-to-maturity Securities Advances: Proceeds from Sale of Federal Home Loan Bank Advances [Abstract] -- None. No documentation exists for this element. -- Proceeds Proceeds from Federal Home Loan Bank Advances Made Payments for Federal Home Loan Bank Advances Mortgage loans held for portfolio: Payments for (Proceeds from) Loans and Leases [Abstract] Principal collected Proceeds from Principal Repayments on Loans and Leases Held-for-investment Purchases Payments to Acquire Loans Held-for-investment Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net decrease in deposits and pass-through reserves Increase (Decrease) in Deposits Net payments on derivative contracts with financing elements Payments for (Proceeds from) Hedge, Financing Activities Net proceeds from issuance of Consolidated Obligations: Proceeds from Issuance of Long-term Debt [Abstract] Discount Notes Proceeds from Other Short-term Debt Bonds Proceeds from Issuance of Other Long-term Debt Payments for maturing and retiring Consolidated Obligations: Payments for maturing and retiring consolidated obligations [Abstract] Payments for maturing and retiring consolidated obligations Discount Notes Repayments of Other Short-term Debt Bonds Repayments of Other Long-term Debt Proceeds from issuance of capital stock Proceeds from Issuance of Common Stock Payments for redemption of mandatorily redeemable capital stock Payments for Repurchase of Common Stock Cash dividends paid Payments of Dividends, Common Stock Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of the period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of the period Supplemental Disclosures: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Net AHP payments, net Payments for Affordable Housing Programs REFCORP assessments paid Payments for Congressionally Mandated Federal Home Loan Bank Assessments Debt Instruments [Abstract] Debt and Capital Leases Disclosures [Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Held-to-maturity Securities, Balance Sheet, Reported Amounts [Abstract] Held to maturity Securities Disclosure [Text Block] This item represents the entire disclosure related to all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. Resolution Funding Corporation [Abstract] Resolution Funding Corporation [Abstract] Resolution Funding Corporation [Text Block] Resolution Funding Corporation [Text Block] This item represents the entire disclosure related to the Congressionally mandated Federal Home Loan Bank assessments, such as Resolution Funding Corporation ("REFCORP") Assessments used to provide funding for resolution and disposition of insolvent savings institutions. Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] Deposit Liabilities Disclosures [Text Block] Deposit Liabilities Disclosures [Text Block] General Discussion of Derivative Instruments and Hedging Activities [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Background Information [Abstract] Background Information [Abstract] Nature of Operations [Text Block] Nature of Operations [Text Block] Allowance for Credit Losses [Abstract] Allowance for Credit Losses [Abstract] Allowance for Credit Losses [Text Block] Allowance for Credit Losses [Text Block] Statement of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Common Class B [Member] Parent [Member] Parent [Member] Common Stock [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Shares, Issued beginning balance Shares, Issued Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Proceeds from sale of capital stock, shares Stock Issued During Period, Shares, New Issues Proceeds from sale of capital stock, par value Stock Issued During Period, Value, New Issues Net shares reclassified to mandatorily redeemable capital stock, shares Shares reclassified to mandatorily redeemable capital stock, shares Shares reclassified to mandatorily redeemable capital stock, shares Net shares reclassified to mandatorily redeemable capital stock, par value Shares reclassified to mandatorily redeemable capital stock, value -- None. No documentation exists for this element. -- Comprehensive income: Other Comprehensive Income (Loss), before Tax, Portion Attributable to Noncontrolling Interest [Abstract] Net Income Other comprehensive income: Other Comprehensive Income (Loss), before Tax [Abstract] Net unrealized losses on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Pension and postretirement benefits Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Dividends on capital stock: Dividends, Common Stock [Abstract] Cash Dividends, Common Stock, Cash Shares, Issued ending balance Ending balance Loans and Leases Receivable Disclosure [Abstract] Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] Advances [Abstract] Advances [Abstract] Advances [Text Block] Advances [Text Block] This item represents the entire disclosure related to all Federal Home Loan Bank loans (advances). Transactions with Other FHLBanks [Abstract] Transactions with Other FHLBanks [Abstract] Transactions with Other FHLBanks [Text Block] Transactions with Other FHLBanks [Text Block] Transactions with Other FHLBanks ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing deposits Interest-bearing Deposits in Banks and Other Financial Institutions Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Federal funds sold Federal Funds Sold Investment securities: Marketable Securities [Abstract] Trading securities Trading Securities Available-for-sale securities Available-for-sale Securities Held-to-maturity securities Held-to-maturity Securities Total investment securities Marketable Securities Advances Federal Home Loan Bank Advances Mortgage loans held for portfolio: Loans and Leases Receivable, Net Reported Amount [Abstract] Mortgage loans held for portfolio Loans and Leases Receivable, Gross, Consumer, Mortgage Less allowance for credit losses on mortgage loans Loans and Leases Receivable, Allowance Mortgage loans held for portfolio, net Loans and Leases Receivable, Net Reported Amount Accrued interest receivable Interest Receivable Premises, software, and equipment, net Property, Plant and Equipment, Net Derivative assets Derivative Assets Other assets Other Assets TOTAL ASSETS Assets LIABILITIES Liabilities [Abstract] Deposits: Deposits [Abstract] Interest bearing Interest-bearing Deposit Liabilities Non-interest bearing Noninterest-bearing Deposit Liabilities Total deposits Deposits Consolidated Obligations, net: Debt and Capital Lease Obligations [Abstract] Discount Notes Other Short-term Borrowings Bonds Unsecured Debt Total Consolidated Obligations, net Debt and Capital Lease Obligations Mandatorily redeemable capital stock Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount Accrued interest payable Interest Payable Affordable Housing Program payable Affordable Housing Program Obligation Payable to REFCORP Payables for Congressionally Mandated Assessments Derivative liabilities Derivative Liabilities Other liabilities Other Liabilities Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies CAPITAL Stockholders' Equity Attributable to Parent [Abstract] Capital stock Class B putable Common Stock, Other Value, Outstanding Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss: Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Net unrealized loss on available-for-sale securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Pension and postretirement plans benefits Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Total accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total capital Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND CAPITAL Liabilities and Equity Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Affordable Housing Program (AHP) [Abstract] Affordable Housing Program (AHP) [Abstract] Affordable Housing Program [Text Block] Affordable Housing Program [Text Block] Trading Securities, Balance Sheet, Reported Amounts [Abstract] Trading Securities (and Certain Trading Assets) Disclosure [Text Block] This item represents the entire disclosure related to trading securities (and certain trading assets) which consist of all investments in certain debt and equity securities (and other assets) that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected. Comprehensive Income [Abstract] Comprehensive Income [Abstract] Comprehensive Income (Loss) Note [Text Block] Comprehensive Income (Loss) Note [Text Block] General Discussion of Pension and Other Postretirement Benefits [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block]