Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Loans held for sale Financing Receivable, Held-for-Sale Distribution Distribution system mortgage notes pledged Distribution Systems [Member] Represents information pertaining to distribution loans. Falls below Baa2/BBB Falls below Baa2/BBB [Member] Falls below Baa2/BBB Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Derivative liability, fair value, gross asset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Adjustment to Compensation, Amount Adjustment to Compensation Amount Committed Loan Facility Committed Loan Facility [Member] Committed Loan Facility Members’ subordinated certificates: Members' Subordinated Certificates [Abstract] Members' Subordinated Certificates [Abstract] Medium-term notes sold to members Medium-term notes sold to members Medium Term Notes Sold to Members [Member] Represents information pertaining to medium-term notes sold to members. Financial Instrument [Axis] Financial Instrument [Axis] Derivative gains (losses): Gain (Loss) on Derivative Instruments, Net, Pretax [Abstract] CFC Electric Distribution Borrower And Subsidiary CFC Electric Distribution Borrower And Subsidiary [Member] CFC Electric Distribution Borrower And Subsidiary Segment Reporting [Abstract] Segment Reporting [Abstract] Unallocated Net Income Retained Earnings, Unappropriated [Member] Schedule of Long-term Debt Outstanding Schedule of Long-Term Debt Instruments [Table Text Block] Master Letter Of Credit Master Letter of Credit [Member] Represents the master letter of credit facility which acts as a guarantee of payment to a beneficiary, or as the source of payment for a specific transaction. Guarantor obligations, maximum exposure, undiscounted Guarantor obligations, maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Restatement Determination Date Restatement Determination Date Amortization of deferred loan fees Amortization of Deferred Loan Origination Fees, Net Derivative Instrument [Axis] Derivative Instrument [Axis] Other non-interest expense Other Noninterest Expense Measurement Frequency [Axis] Measurement Frequency [Axis] Average fixed interest rate Debt Instrument, Average Fixed Interest Rate Debt Instrument, Average Fixed Interest Rate Allowance for credit losses for accrued interest receivable Financing Receivable, Accrued Interest, before Allowance for Credit Loss Industry of Counterparty, Type [Axis] Industry of Counterparty, Type [Axis] LOANS Financing Receivables [Text Block] Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Patronage Capital Allocated Retained Earnings, Appropriated Patronage Capital Allocated [Member] Represents the portion of appropriated retained earnings after allocations for capital, Cooperative educational fund and other board-approved reserves. Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Repayments of finance leases Finance Lease, Principal Payments Debt instrument, termination written notice, term Debt Instrument, Termination Written Notice, Term Debt Instrument, Termination Written Notice, Term Other non-interest expense Other Noninterest Expense, Including Management Fee Expense Other Noninterest Expense, Including Management Fee Expense Doubtful Doubtful Doubtful [Member] Loan and guarantee subordinated certificates Loan and Guarantee Subordinated Certificates Loan and Guarantee Subordinated Certificates Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Retained Earnings, Appropriated Patronage Capital Allocated And Retired Retained Earnings, Appropriated Patronage Capital Allocated And Retired [Member] Retained Earnings, Appropriated Patronage Capital Allocated And Retired Maturity Debt Instrument, Maturity Date Amount Total Total loans outstanding Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Asset-Specific Allowance Asset-Specific Allowance [Member] Asset-Specific Allowance Consolidated Entities [Domain] Consolidated Entities [Domain] 7.35% Collateral Trust Bonds, due 2026 7.35% Collateral Trust Bonds, due 2026 [Member] 7.35% Collateral Trust Bonds, due 2026 Total collateral trust bonds Collateral Trust Bonds [Member] Represents the collateral trust bonds, which are secured obligations sold to investors in the capital markets. Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] 2031 Other Commitment, to be Paid, Year Four Financing receivable, before allowance for credit loss, average remaining maturity Long-Term Financing Receivable, before Allowance for Credit Loss, Average Remaining Maturity Long-Term Financing Receivable, before Allowance for Credit Loss, Average Remaining Maturity Interest Rate Swap with Rating Trigger Interest Rate Swap Rating Trigger [Member] Interest Rate Swap Rating Trigger [Member] Entity Address, State or Province Entity Address, State or Province Decrease in finance receivables Increase (Decrease) in Finance Receivables Expected reclassification from AOCI over 12 months Expected Reclassification from Accumulated Other Comprehensive Income over Next Twelve Months Net of Tax After tax amount of reclassification from accumulated other comprehensive income (loss) expected over the next fiscal year following the latest fiscal year. Nonaccrual Loans Financing receivable, excluding accrued interest, nonaccrual Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount Loans originated, five years before reporting period Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Assets: Assets, Fair Value Disclosure [Abstract] Proceeds from sales and maturities of trading securities Proceeds from Sale and Maturity, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Number of active borrowers Number of borrowers Number Of Active Borrowers Number Of Active Borrowers Notional Amount Derivative, Notional Amount Notes payable outstanding Secured Debt Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Credit Quality Financing Receivable, Credit Quality Indicator [Line Items] Deferred Loan Origination Costs—CFC Unamortized Loan Commitment and Origination Fees [Member] Unamortized Loan Commitment and Origination Fees Receivable Due to CFC Assets Received for Immediate Settlement Aggregate Fair Value The aggregate fair value of assets received to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. Investment securities: Investments [Abstract] Investments [Abstract] Schedule of Notional Amounts and Weighted Average Rates Paid and Received Schedule of Derivative Instruments [Table Text Block] Deferred income Increase (Decrease) in Deferred Revenue Asset-specific allowance Financing Receivable, Allowance for Credit Loss, Individually Evaluated Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Total non-interest income (loss) Noninterest Income Entity Address, City or Town Entity Address, City or Town Total CFC credit commitments Variable Interest Entity, Commitment To Extend Loan Maximum Represents the reporting entity's maximum amount of commitments to extend loan, as a result of its involvement with the variable interest entity. Income before income taxes Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Document Information [Line Items] Document Information [Line Items] Percentage of loans originated, five years before reporting period Financing Receivable, Percent Originated, More Than Five Years Before Current Fiscal Year Financing Receivable, Percent Originated, More Than Five Years Before Current Fiscal Year Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Loans Guaranteed By Rural Utilities Service RUS-guaranteed loans qualifying as permitted investments pledged Loans Guaranteed by Rural Utilities Service [Member] Represents information pertaining to loans receivable guaranteed by Rural Utilities Service. Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] Receivable Type [Domain] Receivable [Domain] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Total commitment Total Commitment Variable interest entity, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Schedule of Unadvanced Commitments Schedule of Unadvanced Commitments [Table Text Block] Schedule of Unadvanced Commitments Other comprehensive income Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] CFC: CFC Parent Company [Member] Number of classes of members Rural Utilities Cooperatives, Number Of Classes Of Members Rural Utilities Cooperatives, Number Of Classes Of Members Stockholder's Equity [Line Items] Stockholder's Equity [Line Items] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Derivative, collateral, obligation to return securities Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Loans and Finance Receivables Loans and Finance Receivables [Member] Loans to members, net Loans to members, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Investment Income [Table] Investment Income [Table] New Accounting Standards Issued But Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Segment Presentation for the Consolidated Statements of Operations and Consolidated Balance Sheets Segment Reporting [Table Text Block] Non-controlling Interests Noncontrolling Interest [Member] Concentration risk, number of borrowers Concentration Risk Number of Borrowers Represents the number of borrowers that account for the concentration risk. Use of Estimates Use of Estimates, Policy [Policy Text Block] Unsecured Debt Unsecured Debt [Member] Long-term debt Total Long-Term Debt External Credit Rating by Grouping [Domain] External Credit Rating by Grouping [Domain] Guarantees Guarantor Obligations [Line Items] Noncash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Less: Allowance for credit losses Balance at the beginning of the period Balance at the end of the period Total allowance for credit losses Allowance for loan loss, rounded amount Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Commercial paper sold directly to members, at par Commercial Paper Sold Directly to Members at Par [Member] Represents information pertaining to commercial paper sold directly to members, at par. Term loans by fiscal year of origination, year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Derivative cash settlements interest income Derivative cash settlements interest income (expense) Interest Income (Expense) On Derivatives Interest Income (Expense) On Derivatives Credit reserve for unadvanced loan commitments Credit Reserve for Unadvanced Loan Commitments Credit Reserve for Unadvanced Loan Commitments Derivative, collateral, obligation to return cash Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Debt instrument, face amount Debt Instrument, Face Amount EQUITY Equity [Text Block] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Repayments of short-term borrowings ≤ 90 days, net Proceeds From (Repayments Of) Short-term Debt, Net Proceeds From (Repayments Of) Short-term Debt, Net Variable rate Variable rate Long-Term Variable Rate Loans [Member] Represents information pertaining to long-term variable-rate loans. Loans outstanding and pledged as collateral Financing Receivable, Collateral For Secured Borrowings Financing Receivable, Collateral For Secured Borrowings Default amount Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Total equity increase Stockholders' Equity, Period Increase (Decrease) Business Segments Segment Reporting, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name AOCI, cash flow hedge, cumulative gain (loss), after tax AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Derivative, collateral, right to reclaim securities Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Schedule of Interest Income and Expense Interest Income and Interest Expense Disclosure [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Pledging of Loans and Loans on Deposit Schedule of Financing Receivables Pledged as Collateral [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name FAIR VALUE MEASUREMENT Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Unrealized gains on equity and debt securities Debt And Equity Securities, FV-NI, Unrealized Gain (Loss) Debt And Equity Securities, FV-NI, Unrealized Gain (Loss) Amortization of debt issuance costs and discounts Amortization of Debt Issuance Costs and Discounts Criticized Criticized [Member] Unrealized Losses on Defined Benefit Plans Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] Derivative forward value (gains) losses Derivative forward value gains (losses) Unrealized Gain (Loss) on Derivatives Letter of credit, maximum amount available Letter of Credit Maximum Amount Available Represents the maximum amount of letters of credit that are available under the credit facility. Medium-Term Notes Medium-Term Note [Member] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Payments for retirement of members’ subordinated certificates Payments for Retirement of Members Subordinated Certificates The cash outflow from the repayment of members' subordinated certificates where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral. Long-term debt, gross Long-Term Debt, Gross NCSC National Cooperative Services Corporation [Member] Represents information pertaining to National Cooperative Services Corporation. Term loans by fiscal year of origination, year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Annual facility fee Line of Credit Facility, Commitment Fee Percentage Total members’ subordinated certificates Members’ subordinated certificates Members Subordinated Certificates Members Subordinated Certificates Credit Facility [Domain] Credit Facility [Domain] Number of reportable segments not disclosed NumberOfReportableSegmentsNotDisclosedFlag NumberOfReportableSegmentsNotDisclosedFlag Additions (repayments) for membership fees, net Proceeds From (Repayments Of) Membership Fees Proceeds From (Repayments Of) Membership Fees Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other assets Assets Other than Receivables The aggregate carrying amounts, as of the balance sheet date, of assets, other than receivables, separately disclosed in the balance sheet. Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Accounts, Notes, Loans and Financing Receivable [Line Items] Unadvanced Loan Commitments Accounts, Notes, Loans and Financing Receivable [Line Items] ALLOWANCE FOR CREDIT LOSSES Allowance for Credit Losses [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Loss [Abstract] Credit Loss [Abstract] Loans to members Loans to members Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Total commercial paper Commercial Paper [Member] DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Mortgage notes Mortgage Receivable [Member] Unadvanced Commitments Commitments to Extend Credit [Member] Short-term borrowings Short-term borrowings Short-Term Debt Guarantor obligations CFC third-party guarantees Guarantor Obligations, Current Carrying Value Derivative liability, fair value, gross liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Other receivables Other Receivables GUARANTEES Guarantees [Text Block] Total debt outstanding Long Term Debt, Including Members' Subordinated Certificates Long Term Debt, Including Members' Subordinated Certificates Derecognition of lease ROU assets Derecognition of Lease ROU Assets Derecognition of Lease ROU Assets Accrued interest receivable Accrued Investment Income Receivable Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Medium-term Notes, Floating Rate Medium-term Notes, Floating Rate [Member] Medium-term Notes, Floating Rate Financing receivable, allowance for credit loss, period increase Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Award Timing Predetermined Award Timing Predetermined [Flag] Guarantee obligations unsecured commitment as percentage of total commitment Guarantee Obligations Unsecured Commitment as Percentage of Total Commitment Represents the unsecured guarantee obligations as a percentage of total guarantee obligations. Letters of credit outstanding, amount Letters of Credit Outstanding Letters of Credit Outstanding, Amount Repayments of unsecured debt Repayments of Unsecured Debt Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Three-year Agreement Three Year Agreement [Member] Three Year Agreement [Member] Proceeds from issuance of unsecured debt Proceeds from Issuance of Unsecured Debt Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Notional amount Notional Amount Derivative Asset, Notional Amount Proceeds from sales of loans held for sale Proceeds from Sale, Loan, Held-for-Sale Subordinated deferrable debt Subordinated Long-Term Debt, Noncurrent Proceeds for sale of debt investment securities Proceeds from Sale, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Number of counterparties subject to ratings trigger and early termination provision Number Of Counterparties Subject to Ratings Trigger And Early Termination Provision Number Of Counterparties Subject to Ratings Trigger And Early Termination Provision Schedule of Variable Interest Entities, Credit Commitments Schedule Of Variable Interest Entities, Credit Commitments [Table Text Block] Schedule of Variable Interest Entities, Credit Commitments [Table Text Block] All Executive Categories All Executive Categories [Member] Loans receivable commercial and industrial not covered by Farmer Mac standby repurchase agreement Loans Receivable Commercial and Industrial Not Covered By Farmer Mac Standby Repurchase Agreement [Member] Loans Receivable Commercial and Industrial Not Covered By Farmer Mac Standby Repurchase Agreement Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Long-term debt Long-Term Debt, Fair Value Depreciation and amortization Depreciation Collective Allowance Collective Allowance [Member] Collective Allowance Concentration Risk Type [Domain] Concentration Risk Type [Domain] AOCI, Net of Tax AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Subordinated Debt [Abstract] Subordinated Debt [Abstract] Derivative cash settlements interest income Realized Gain (Loss) On Derivatives Realized Gain (Loss) On Derivatives Total credit enhancements Variable Interest Entity, Consolidated Carrying Amount Obligations Guaranteed By Primary Beneficiary The carrying amount of the consolidated Variable Interest Entity's obligations which are guaranteed by the primary beneficiary. Farmer Mac: Federal Agricultural Mortgage Corporation [Member] Represents information pertaining to the lender, Federal Agricultural Mortgage Corporation. Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Percentage of patronage capital allocation Patronage Refunds Percentage of Allocation of Net Earnings Represents the percentage of net earnings distributed to patrons of the cooperative as authorized by the entity's Board of Directors. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Patronage capital retirement payable Patronage Capital Retirement Payable Carrying value as of the balance sheet date of earnings retired of net earning allocated to patrons at the end of the year, as required by the District of Columbia cooperative law. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] BUSINESS SEGMENTS Segment Reporting [Text Block] Guarantee liability Guarantees, Fair Value Disclosure Unadvanced line of credit commitments, term Unadvanced Line of Credit Commitments, Term Unadvanced Line of Credit Commitments, Term Expiration Date Trading Arrangement Expiration Date Daily liquidity fund notes to members Daily Liquidity Fund Notes Sold Directly to Members [Member] Represents information pertaining to daily liquidity fund notes sold directly to members. Payments for retirement of subordinated deferrable debt Repayments of Subordinated Debt Hedging Relationship [Axis] Hedging Relationship [Axis] Select notes to members Select Notes [Member] Represents information pertaining to select notes. VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Restricted cash Restricted cash Restricted Cash and Cash Equivalent Total outstanding commitments Variable Interest Entity, Total outstanding commitments Variable Interest Entity, Total outstanding commitments Farmer Mac Notes Payable Farmer Mac Notes Payable [Member] Farmer Mac Notes Payable [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Total equity Beginning balance Ending balance Equity Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Subordinated debt Subordinated Debt [Member] Total financial liabilities Financial liabilities Financial Liabilities Fair Value Disclosure Derivative Derivative [Member] Other liabilities Other Liabilities Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Nonaccrual loans, Percentage of total loans Financing Receivable, Nonaccrual, Percent Past Due Fee and other income Fee and other income Noninterest Income, Other Operating Income Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Industry of Counterparty [Domain] Industry of Counterparty [Domain] Deferred compensation investments Deferred Compensation Plan Assets Unamortized premium (discount), net Debt Instrument, Unamortized Discount (Premium), Net Individually evaluated loans Financing Receivable, Individually Evaluated for Credit Loss Exercise Price Award Exercise Price Unadvanced line of credit commitments as percentage of unadvanced loan commitments Unadvanced Line of Credit Commitments as Percentage of Unadvanced Loan Commitments Unadvanced Line of Credit Commitments as Percentage of Unadvanced Loan Commitments Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Recurring Basis Fair Value, Recurring [Member] Segment Information Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Derivative assets: Derivative Asset [Abstract] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Interest rate swaps Interest Rate Swap [Member] TEXAS TEXAS Lender Name [Axis] Lender Name [Axis] Special mention Special Mention [Member] Proceeds from collection of finance receivables Proceeds from Collection of Finance Receivables Accrued interest payable Interest Payable Number of states with active borrowers Number Of States With Active Borrowers Number Of States With Active Borrowers Federal Financing Bank Federal Financing Bank [Member] Represents information pertaining to the lender, Federal Financing Bank. Revolving Term Loan Revolving Term Loan [Member] Revolving Term Loan Derivative liabilities: Derivative Liability [Abstract] 2030 Other Commitment, to be Paid, Year Three INVESTMENT SECURITIES Investments and Other Noncurrent Assets [Text Block] CFC National Rural Utilities Cooperative Finance Corporation [Member] Represents the National Rural Utilities Cooperative Finance Corporation, an operating segment of the entity. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Patronage capital retirement Patronage capital retirement Patronage Capital Retirement Patronage Capital Retirement Equity Component [Domain] Equity Component [Domain] Interest income: Interest and Fee Income, Financing Receivable [Abstract] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Total secured long-term debt Secured Debt [Member] Loans to members, net Loans Receivable, Fair Value Disclosure Performance guarantee Performance Guarantee [Member] Proceeds from sale of loans and leases held-for-investment Proceeds from Sale, Loan and Lease, Held-for-Investment Line of credit loans Line of credit loans Line of Credit Loans [Member] Represents information pertaining to line of credit loans receivable. Adoption Date Trading Arrangement Adoption Date Subordinated deferrable debt Subordinated Debt Obligations, Fair Value Disclosure Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Counterparty Name [Domain] Counterparty Name [Domain] Total CFC equity Equity, Attributable to Parent INTEREST INCOME AND INTEREST EXPENSE Interest Income and Interest Expense Disclosure [Text Block] 2029 Other Commitment, to be Paid, Year Two > 90 days past due, Percentage of total loans Financing Receivable Recorded Investment Equal to Greater than 90 Days Past Due Percentage Financing receivables that are equal to or greater than 90 days past due as a percentage of total loans. Equity securities, at fair value Equity securities, at fair value Equity Securities, FV-NI, Current Assets: Assets: Assets [Abstract] Weighted- Average Rate Paid Derivative Weighted Average Interest Rate Paid Percentage Represents the weighted average interest rate paid on derivative contracts. Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Schedule of Loans Outstanding by Borrower Risk Ratings and Origination Year Financing Receivable Credit Quality Indicators [Table Text Block] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Insider Trading Policies and Procedures [Line Items] Finance lease liability Finance Lease, Liability Nonperforming Financial Instruments Nonperforming Financial Instruments [Member] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Short-term borrowings Interest Expense, Short-Term Borrowings Loans Loans Receivable [Member] Schedule of Total Available and Outstanding Letters of Credit Under the Revolving Credit Agreements Schedule of Line of Credit Facilities [Table Text Block] Other general and administrative expenses Selling, General and Administrative Expense Telecom Telecommunications [Member] Telecommunications Interest Rate Swap Subject To Rating Trigger and Early Termination Provision Interest Rate Swap Subject To Rating Trigger And Early Termination Provision [Member] Interest Rate Swap Subject To Rating Trigger And Early Termination Provision Transfers Between Levels Fair Value Transfer, Policy [Policy Text Block] CFC credit commitments available Variable Interest Entity, Commitment to Extend Loan Available Amount Variable Interest Entity, Commitment to Extend Loan Available Amount Letters of credit Letter of Credit [Member] Patronage refunds Patronage Refunds Retail Investors Retail Investors [Member] Retail Investors Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Maximum percentage of patronage capital distribution allowed Maximum Percentage of Patronage Capital Distribution Allowed Maximum Percentage of Patronage Capital Distribution Allowed Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Medium-term notes sold through dealers Medium Term Notes Sold Through Dealers [Member] Represents information pertaining to medium-term notes sold through dealers in the capital markets. Entity Central Index Key Entity Central Index Key Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Underlying Asset Class [Axis] Underlying Asset Class [Axis] Banking and Thrift, Interest [Abstract] Banking and Thrift, Interest [Abstract] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss All Adjustments to Compensation All Adjustments to Compensation [Member] Schedule of Guarantor Obligations [Table] Guarantor Obligation [Table] Proceeds from short-term borrowings with original maturity > 90 days Proceeds from Short-Term Debt, Maturing in More than Three Months Equity: Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Falls below Baa1/BBB+ Moodys Baa 1 Rating Standard Poor's BBB Plus Rating [Member] Baa1 or BBB+ credit rating as defined by the external credit rating agency, Moody's or Standard & Poor's. Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Number of active facilities Line of Credit Facility, Number of Active Facilities Line of Credit Facility, Number of Active Facilities Loans Accounts Receivable [Member] Other Stockholders' Equity, Other Changes in unrealized gains Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Substandard Substandard [Member] CFC equity: Equity, Attributable to Parent [Abstract] Results of operations: Income Statement [Abstract] Total financial liabilities Financial Liabilities Financial Liabilities Fixed rate Fixed rate Long Term Fixed Rate Loans [Member] Represents information pertaining to long-term fixed-rate loans. Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Intersegment Eliminations Intersegment Eliminations [Member] Unrealized gain position Derivative Amount, Unrealized Gain (Loss) Position Derivative Amount, Unrealized Gain (Loss) Position Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Advances on loans held for sale Payment for Origination and Purchase, Loan, Held-for-Sale Accumulated Other Comprehensive Income (Loss) Total AOCI Attributable to Parent [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Loans outstanding Financing Receivable, Before Allowance For Credit Loss, Loans To Members Financing Receivable, Before Allowance For Credit Loss, Loans To Members Payments for issuance costs for subordinated deferrable debt Payment for Issuance Costs of Subordinated Deferrable Debt Payment for Issuance Costs of Subordinated Deferrable Debt Name Forgone Recovery, Individual Name Guaranteed Underwriter Program notes payable Guaranteed Underwriter Program Notes Payable [Member] Guaranteed Underwriter Program Notes Payable [Member] Adjustable And Floating Rate Tax Exempt Bonds Adjustable and Floating Rate Tax Exempt Bonds [Member] Represents activity related to adjustable and floating-rate tax-exempt bonds. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement Statement [Line Items] Collectively evaluated loans Financing Receivable, Collectively Evaluated for Credit Loss Total assets Assets Four-year Agreement Four Year Agreement [Member] Four Year Agreement Entity [Domain] Entity [Domain] Retained Earnings Allocation Held For Twenty Five Years Retained Earnings Allocation Held for Twenty Five Years [Member] Retained Earnings Allocation Held for Twenty Five Years [Member] Interest expense Total interest expense Interest expense Interest Expense, Operating Non-performing and restructured loans: Internal Credit Assessment [Domain] Investment securities gains Debt And Equity Securities, FV-NI, Gain (Loss) Debt And Equity Securities, FV-NI, Gain (Loss) Operating Segments Operating Segments [Member] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Statewide and associate Statewide and Associate [Member] Represents information pertaining to statewide and associate loans. PEO PEO [Member] Period for which prior years allocated patronage capital is required to be held Period For Which Prior Years Allocated Patronage Capital Is Required To Be Held Represents the period for which prior year's allocated patronage capital is required to be held. % of Total Financing Receivable, before Allowance for Credit Loss, to Total, Percent Derivative asset, fair value, gross liability Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Repayments of short-term borrowings with original maturity > 90 days Repayments of Short-Term Debt, Maturing in More than Three Months Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Total investment securities, at fair value Investments Membership subordinated certificates Membership Subordinated Certificates Membership Subordinated Certificates Term of loans Term of Loans Represents the term of loans offered. Subsequent Event Type [Domain] Subsequent Event Type [Domain] Largest Single Borrower Or Controlled Group Largest Single Borrower or Controlled Group [Member] Largest Single Borrower or Controlled Group CFC Retained Equity Retained Earnings [Member] Revolving Credit Agreements Revolving Credit Facility [Member] Long-term debt Other Long-Term Debt, Noncurrent Deferred loan origination costs Deferred loan origination costs Financing Receivable, Unamortized Loan Cost (Fee) Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Maximum additional amount potentially required to be issued Letter Of Credit Facility Maximum Additional Amount Potentially Required To Be Issued Represents the maximum potential additional amount that may be required to be issued to third parties for the benefit of the entity's members. Schedule of Fair Value by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Payments for issuance costs for revolving bank lines of credit Payments of Debt Issuance Costs Payment Status of Loans Financing Receivable, Past Due [Line Items] Corporate debt securities Corporate Debt Securities [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Cash and investment securities Interest Income, Cash, And Investment Securities Interest Income, Cash, And Investment Securities Distribution and power supply system mortgage notes pledged Distribution and Power Supply System [Member] Represents information pertaining to distribution and power supply systems. Liabilities: Liabilities, Fair Value Disclosure [Abstract] Cash Flow Hedging Cash Flow Hedging [Member] Revolving Credit Agreements Line of Credit Facility [Line Items] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Term loans by fiscal year of origination, year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Debt securities, unrealized gains Debt Securities, Trading, Unrealized Gain Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Schedule of Offsetting Assets Offsetting Assets [Table Text Block] Loans Guaranteed By Farmer Mac Loans Guaranteed by Farmer Mac [Member] Loans Guaranteed by Farmer Mac Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Fixed assets, net of accumulated depreciation of $96,737 and $98,647 as of August 31, 2026 and May 31, 2026, respectively Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Amount Available for Access Line of Credit Facility, Remaining Borrowing Capacity Net Investment Income [Line Items] Net Investment Income [Line Items] Financial Instruments [Domain] Types of Financial Instruments [Domain] Financial Instruments [Domain] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Term loans by fiscal year of origination, year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Derivative assets Fair Value Derivative asset, fair value, amount not offset against collateral Derivative Asset Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Number of loans that defaulted Financing Receivable, before Allowance for Credit Loss, Number of Defaults Financing Receivable, before Allowance for Credit Loss, Number of Defaults Less: Total comprehensive (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Commercial agency mortgage-backed securities (“MBS”) Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Payable Due from CFC Assets Needed for Immediate Settlement, Aggregate Fair Value Power supply Power Supply Systems [Member] Represents information pertaining to power supply loans. Leases Lessor, Leases [Policy Text Block] Accrued interest payable Increase (Decrease) in Interest Payable, Net Three Year Agreement Mature On Nov 28, 2028 Three Year Agreement Mature On Nov 28, 2028 [Member] Three Year Agreement Mature On Nov 28, 2028 Derivative liability, fair value, amount offset against collateral Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Collateral Trust Bonds 2007 Indenture Collateral Trust Bonds 2007 Indenture [Member] Represents collateral trust bonds issued under a 2007 indenture. Commercial paper sold through dealers, net of discounts Commercial Paper Sold Through Dealers Net of Discounts [Member] Represents information pertaining to commercial paper sold through dealers, net of discounts. Debt outstanding: Debt and Lease Obligation [Abstract] 5.0 Percent Collateral Trust Bonds 5.0 Percent Collateral Trust Bonds [Member] 5.0 Percent Collateral Trust Bonds Segment Reporting [Table] Segment Reporting [Table] Debt instrument, renewal periods Debt Instrument, Renewal Periods Debt Instrument, Renewal Periods Twenty Largest Borrowers Twenty Largest Borrowers [Member] Twenty Largest Borrowers Member capital securities Member Capital Securities Member Capital Securities Loan modifications to borrowers experiencing financial difficulty Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Number of agreements executed Derivative, Number of Instruments Held Guarantees [Abstract] Guarantees [Abstract] Recognition of net investments in lease through exchange of lease ROU assets Recognition of Net Investment In Lease Through Exchange of Lease ROU Assets Recognition of Net Investment In Lease Through Exchange of Lease ROU Assets All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Long-term tax-exempt bonds Long Term Tax Exempt Bonds [Member] Represents information pertaining to long-term tax-exempt bonds. Current Fiscal Year End Date Current Fiscal Year End Date 2027 Other Commitment, to be Paid, Remainder of Fiscal Year Total financial assets Financial Assets Financial Assets Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Provision for credit losses Provision for credit losses Provision (benefit) for credit losses Provision for credit losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] Number of defaulted loans put to Farmer Mac for purchase Financing Receivable, before Allowance for Credit Loss, Number of Defaulted Loans Purchased Financing Receivable, before Allowance for Credit Loss, Number of Defaulted Loans Sold Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Weighted- Average Rate Received Derivative Weighted Average Interest Rate Received Percentage Represents the weighted average interest rate received on derivative contracts. Total past due, Percentage of total loans Financing Receivable Recorded Investment Past Due Percentage Recorded Investment in financing receivables that are past due at the balance sheet date as a percentage of total loans. Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Schedule of Allowance for Credit Losses on Financing Receivables Financing Receivable, Allowance for Credit Loss [Table Text Block] Measure: Measure [Axis] Schedule of Assets and Liabilities of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Unadvanced Commitments Not Subject to Material Adverse Change Clauses Commitments To Extend Credit Not Subject To Material Adverse Change Clause [Member] Loan commitments are legally binding commitments to extend credit to a counterparty under certain terms and conditions, other than material adverse change clauses. Schedule of Total Guarantees by Type of Guarantee and Member Class Schedule of Guarantor Obligations [Table Text Block] Forward pay-fixed swaps Forward Contracts [Member] Equity Components [Axis] Equity Components [Axis] principal amount Debt Instrument, Repurchase Amount Cash paid for income taxes Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Long-term debt Long-Term Debt [Member] Less: Net (income) loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent Non-interest expense: Noninterest Expense [Abstract] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Total loans outstanding, Percentage of total loans Financing Receivable Commercial, Net of Deferred Income, Percentage Represents the percentage of total loan that is represented by a particular financial receivable category. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Total comprehensive income attributable to CFC Comprehensive Income (Loss), Net of Tax, Attributable to Parent Interest expense Interest Expense, Excluding Interest Expense on Derivatives Interest Expense, Excluding Interest Expense on Derivatives Unamortized premium (discount), net Debt Instrument, Unamortized Discount Termination Date Trading Arrangement Termination Date Four Year Agreement Mature On Nov 28, 2029 Four Year Agreement Mature On Nov 28, 2029 [Member] Four Year Agreement Mature On Nov 28, 2029 Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] 30-89 Days Past Due Financing Receivables, 30 to 89 Days Past Due [Member] Financing Receivables, 30 to 89 Days Past Due [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Defined benefit plan adjustments Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Number of active derivative counterparties Derivative asset, fair value, amount offset against collateral Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Financing receivable, loan commitment, term Financing Receivable, Loan Commitment, Term Financing Receivable, Loan Commitment, Term Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] SUBORDINATED DEFERRABLE DEBT Subordinated Borrowings Disclosure [Text Block] Document Type Document Type 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] Fair Value as of Grant Date Award Grant Date Fair Value Guarantee liability recorded Guarantee Liability Recorded Guarantee Liability Recorded SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Local Phone Number Local Phone Number Guaranty liabilities Guaranty Liabilities Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Financial standby letter of credit Financial Standby Letter of Credit [Member] Commitments to Extend Credit Subject to Material Adverse Change Clause Commitments to Extend Credit Subject to Material Adverse Change Clause [Member] Loan commitments are legally binding commitments to extend credit to a counterparty under certain terms and conditions, including material adverse change clauses. Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Medium-term Notes, Fixed Rate Medium-term Notes, Fixed Rate [Member] Medium-term Notes, Fixed Rate Schedule of Allowance for Credit Losses and Recorded Investment in Financing Receivables Allowance for Credit Losses and Recorded Investment in Financing Receivables [Table Text Block] Tabular disclosure of allowance for credit losses including specific valuation allowance related to individually-evaluated impaired loans, as well as a general reserve for other probable incurred losses for loans that are collectively evaluated. Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Retained Earnings Allocation Of 50% Of Prior Year Patronage Capital Allocation Retained Earnings Allocation of Fifty Percent of Prior Year Patronage Capital Allocation [Member] Retained Earnings Allocation of Fifty Percent of Prior Year Patronage Capital Allocation [Member] Executive Category: Executive Category [Axis] Long-term loans Long Term Loans [Member] Long Term Loans [Member] Receivable Type [Axis] Receivable Type [Axis] Guarantee obligations secured Guarantee Obligations Secured Represents the amount of guarantee obligations secured. Farmer Mac notes payable Federal Agricultural Mortgage Corporation Notes Payable [Member] Federal Agricultural Mortgage Corporation Notes Payable [Member] Counterparty Name [Axis] Counterparty Name [Axis] Liabilities: Liabilities and Equity [Abstract] Loans Interest and Fee Income, Loans, Commercial, Industrial, and Agricultural Loans Schedule of the Entity's Assets and Liabilities that are Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Available Balance and Maturities of Lines of Credit Schedule of Unadvanced Commitments Maturities [Table Text Block] [Table Text Block] for Schedule of Unadvanced Commitments Maturities [Table] All Award Types Award Type [Domain] Current, Percentage of total loans Financing Receivable Recorded Investment Current Percentage Financing receivables that are current as a percentage of total loans. Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Derivative, net liability position Derivative, Net Liability Position, Aggregate Fair Value Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Level 3 Fair Value, Inputs, Level 3 [Member] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Reclassification to earnings of realized gains on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Interest income Total interest income Interest and Fee Income, Loans, Commercial Schedule of Pledged Collateral Loans Schedule of Financing Receivables Pledged as Collateral Against Debt Instruments [Table Text Block] Tabular disclosure of loans outstanding as collateral pledged to secure outstanding debt instruments. Falls below A3/A- Moodys A3 Rating Standard Poors A Minus Rating [Member] Moodys A3 Rating Standard Poors A Minus Rating [Member] PEO Name PEO Name Thereafter Other Commitment, to be Paid, after Year Four Other Commitment, to be Paid, after Year Four Geographical [Axis] Geographical [Axis] Unrealized Gains on Derivative Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Number of votes per member for election of directors Number Of Votes Per Member For Election Of Directors Represents the number of votes by each member for election of directors to the board. Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Schedule of Short-term Debt [Table] Short-Term Debt [Table] The Company Nature of Operations [Policy Text Block] Disclosure of accounting policy for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). Repayments of secured debt Repayments of Secured Debt Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] NCSC National Cooperative Services Corporation And Rural Telephone Finance Cooperative [Member] National Cooperative Services Corporation And Rural Telephone Finance Cooperative [Member] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Schedule of Payment Status of Loans Outstanding Financing Receivable, Past Due [Table Text Block] Current Financial Asset, Not Past Due [Member] Long-term debt and subordinated debt Interest Expense, Debt Other assets Prepaid Expense and Other Assets Changes in unrealized gains on derivative cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Institutional Investor Institutional Investor [Member] Institutional Investor Non-interest income (loss): Non-interest income: Noninterest Income [Abstract] Total cash, cash equivalents and restricted cash Beginning cash, cash equivalents and restricted cash Ending cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Derivative, collateral, right to reclaim cash Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Pay-fixed swaps Pay Fixed Receive Variable Swaps [Member] An arrangement between two parties (counterparties), in which one party pays at a fixed rate, while the other pays at a floating rate. Notes Payable Total secured notes payable Secured Notes Payable [Member] Represents information pertaining to secured notes payable. Number of active derivative counterparties Number Of Active Derivative Counterparties Number Of Active Derivative Counterparties Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Salaries and employee benefits Salaries and employee benefits Labor and Related Expense Guarantee liability Guaranty Liabilities Contingent And Noncontingent This item represents the liability for the fair value of an obligation to stand ready to perform over the term of a guaranty issued in the event that specified triggering events or conditions occur. CFC Electric Distribution Borrower CFC Electric Distribution Borrower [Member] CFC Electric Distribution Borrower Collateral Trust Bonds 1994 Indenture Collateral Trust Bonds 1994 Indenture [Member] Represents collateral trust bonds issued under a 1994 indenture. (Advances) repayments on loans held for investment, net Payments for (Proceeds from) Loans and Leases Schedule of Notional Amounts of Derivative Instruments Having Rating Triggers Disclosure of Credit Derivatives [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Short-Term Debt Short-Term Debt [Member] Schedule of Fair Values and Notional Amounts of Outstanding Derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Insider Trading Arrangements [Line Items] Short-term borrowings Short-Term Debt, Fair Value Schedule of Gains and Losses Recorded on the Consolidated Statements of Operations for the Entity's Interest Rate Swaps Derivative Instruments, Gain (Loss) [Table Text Block] Award Type Award Type [Axis] Other secured guarantees Guarantee Type, Other Secured [Member] Guarantee Type, Other Secured [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Derivative Counterparty Concentration Risk Derivative Counterparty Concentration Risk [Member] Derivative Counterparty Concentration Risk Retained equity Retained Earnings (Accumulated Deficit) Schedule of Short-term Debt Schedule of Short-Term Debt [Table Text Block] Total interest rate swaps Interest Rate Swaps, Excluding Forward Pay-Fixed Swaps [Member] Interest Rate Swaps, Excluding Forward Pay-Fixed Swaps Equity securities, fair value Equity Securities, FV-NI Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Net Receivable (Payable) Net Asset Needed for Immediate Settlement Aggregate Fair Value The net aggregate fair value of assets needed to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Proceeds from issuance of secured debt Proceeds from Issuance of Secured Debt Available under committed loan facilities Debt Instrument, Unused Borrowing Capacity, Amount Short-term Debt [Line Items] Short-Term Debt [Line Items] Credit Availability Concentration Risk Credit Availability Concentration Risk [Member] Common Stock Common Stock [Member] Borrowings payable to CFC Other Borrowings External Credit Rating by Grouping [Axis] External Credit Rating by Grouping [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Schedule of Loans Outstanding to Members and Unadvanced Commitments by Loan Type and by Member Class Schedule of Financing Receivables [Table Text Block] Tabular disclosure of the various types of loan outstanding with the carrying value as of the balance sheet date. Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Membership Fees and Educational Fund Retained Earnings, Appropriated Membership Fees And Education Fund [Member] Represents the portion of retained earnings appropriated for the cooperative educational fund and membership fees reserves. Three Year Agreement Mature On Nov 28, 2027 Three Year Agreement Mature On Nov 28, 2027 [Member] Three Year Agreement Mature On Nov 28, 2027 Derivative Contract [Domain] Derivative Contract [Domain] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Total Past Due Financial Asset, Past Due [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Pass Pass [Member] Proceeds from issuance of long-term debt, net of discounts and issuance costs Proceeds from Issuance of Senior Long-Term Debt Underlying Asset Class [Domain] Underlying Asset Class [Domain] Debt securities trading, at fair value Debt securities trading, at fair value Debt Securities, Trading Tabular List, Table Tabular List [Table Text Block] LONG-TERM DEBT Long-Term Debt [Text Block] Payments for retirement of long-term debt Repayments of Senior Debt Total CFC Equity Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Loans Receivable Commercial And Industrial Loans Receivable Commercial and Industrial [Member] Represents information pertaining to the loans issued to commercial and industrial institutions. Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] 30-89 days past due, Percentage of total loans Financing Receivable Recorded Investment 30 to 89 Days Past Due Percentage Financing receivables that are less than 90 days past due but more than 29 days past due as a percentage of total loans. Schedule of Investment Debt Securities Portfolio and Fair Value Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Members’ Capital Reserve Retained Earnings, Appropriated Capital Reserve [Member] Represents the portion of retained earnings appropriated for the members' capital reserve. The members' capital reserve represents net earnings held to increase equity retention. The net earnings held in the members' capital reserve have not been specifically allocated to members, but may be allocated to individual members in the future as patronage capital if authorized by the Board of Directors. Adjustment to Compensation: Adjustment to Compensation [Axis] Realized (gains) losses reclassified to earnings Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Class of Stock [Domain] Class of Stock [Domain] Maximum borrowing capacity Debt Instrument Maximum Borrowing Capacity Maximum amount of borrowing capacity under the long term financing arrangement that is available to the entity as of the balance sheet date. Credit Concentration Risk Credit Concentration Risk [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Investments in fixed assets, net Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Total unadvanced commitments Available Balance Other Commitment Schedule of Available Balance Under Committed Lines of Credit and the Related Maturities by Fiscal Year Schedule of Available Balance and Maturities of Committed Lines of Credit [Table Text Block] Tabular disclosure of available balance under committed lines of credit and the related maturities by fiscal year. Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total financial assets Financial assets Assets, Fair Value Disclosure Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Debt [Member] Number of borrower defaults Financing Receivable, Number of Borrower Defaults Financing Receivable, Number of Borrower Defaults Long-term debt Debt Instrument [Line Items] Net investment in leases Sales-Type Lease, Net Investment in Lease, Excluding Accrued Interest, after Allowance for Credit Loss Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] 5.50% Subordinated Notes, due 2064 5.50% Subordinated Notes, due 2064 [Member] 5.50% Subordinated Notes, due 2064 Entity Filer Category Entity Filer Category Deferred loan conversion fees Deferred Loan Conversion Fees Amount of unrecognized conversion fee revenue that is deferred and recognized using the effective interest method over the remaining original loan interest rate pricing term. Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Stockholder's Equity [Table] Stockholder's Equity [Table] Schedule detailing information related to stockholders' equity. Falls to or below Baa2/BBB Moody's Baa 2 Rating Standard Poor's BBB Rating [Member] Moody's Baa 2 Rating Standard Poor's BBB Rating [Member] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Accrued interest receivable Interest Receivable Name Trading Arrangement, Individual Name Allowance components: Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Cash and cash equivalents Cash and Cash Equivalent Other credit enhancements Variable Interest Entity, Other credit enhancements Variable Interest Entity, Other credit enhancements Deferred income Deferred Revenue and Credits Number of borrowers, nonperforming loans Number of Borrowers, Nonperforming Loans Number of Borrowers, Nonperforming Loans Derivative gains (losses) Derivative gains (losses) Gain (Loss) on Derivative Instruments, Net, Pretax Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Investment securities gains Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Members’ subordinated certificates Members Subordinated Certificates, At Fair Value Members Subordinated Certificates, At Fair Value Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Electric Electric Utility [Member] Electric Utility Principal payments received under sales-type leases Proceeds from Lease Payment, Sales-Type and Direct Financing Leases, Investing Activity Equity securities, unrealized gain Equity Securities, FV-NI, Unrealized Gain (Loss) SHORT-TERM BORROWINGS Short-Term Debt [Text Block] Depreciation and amortization Depreciation, Depletion and Amortization 2028 Other Commitment, to be Paid, Year One Financing receivable, allowance for coverage ratios Financing Receivable, Allowance for Credit Loss to Outstanding, Percent Allowance for Loan and Lease Losses [Roll Forward] Allowance for Loan and Lease Losses [Roll Forward] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Finance lease ROU assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Collective allowance Financing Receivable, Allowance for Credit Loss, Collectively Evaluated Derivative liabilities Fair Value Derivative liability, fair value, amount not offset against collateral Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Medium-term notes sold through dealers and to members Unsecured Medium Term Notes [Member] Represents information pertaining to unsecured medium-term notes. Entity Address, Address Line One Entity Address, Address Line One Income tax benefit (provision) Income tax (provision) benefit Income Tax Expense (Benefit) Total non-interest expense Noninterest Expense Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Guarantee obligations unsecured Guarantee Obligations Unsecured Represents the amount of guarantee obligations with unsecured rights of recovery from the entity's members. medium-term Notes Due 2026 medium-term Notes Due 2026 [Member] medium-term Notes Due 2026 Consolidation Consolidation, Policy [Policy Text Block] Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Charges-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] NCSC: Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Notional Amount Derivative Liability, Notional Amount Receive-fixed swaps Pay Variable Receive Fixed Swaps [Member] An arrangement between two parties (counterparties), in which one party pays at a floating rate, while the other pays at a fixed rate. 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