Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Derivative Assets Net [Abstract] Offsetting Derivative Assets [Abstract] Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] GAAP Carrying Amount Reported Value Measurement [Member] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Table - Assets Measured at Fair Value on a Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Pledged Status [Axis] Pledged Status [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Financing Receivable, Nonaccrual, No Allowance Financing Receivable, Nonaccrual, No Allowance Other assets, fair value Total other assets Other Assets Other Assets, Fair Value Disclosure Segment Reporting [Abstract] Segment Reporting [Abstract] Collateral Securities Repledged, Delivered, or Used Collateral Securities Repledged, Delivered, or Used Loss Contingency Accrual Loss Contingency Accrual Maximum exposure Guarantor Obligations, Maximum Exposure, Undiscounted Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Other Other Securitization Product [Member] Other Securitization Product Consolidated Entities [Axis] Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Investments securities Securities Investment [Member] Issues Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Proceeds from repayments of mortgage loans acquired held-for-investment Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Doubtful Doubtful [Member] Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Fixed Rate Fixed Rate [Member] Fixed Rate Consolidated Entities [Domain] Consolidated Entities [Domain] More than five years before current fiscal Year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff CumulativeBasisAdjustmentonFairValueHedge [Domain] CumulativeBasisAdjustmentonFairValueHedge [Domain] CumulativeBasisAdjustmentonFairValueHedge Five years before current fiscal year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year UPB of mortgage loans - HFS Mortgage Loans Unpaid Principal Balance HFS Represents the unpaid principal balance of mortgage loans held-for-sale. Guarantees of Fannie Mae securities Fannie Mae securities backing Freddie Mac resecuritization trust [Member] Fannie Mae securities backing Freddie Mac resecuritization trust. Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount UPB of mortgage loans - HFI Mortgage Loans Unpaid Principal Balance HFI The unpaid principal balance related to held-for-investment mortgage loans. Number of reportable segments Number of Reportable Segments Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Concentration Risk [Table] Concentration Risk [Table] Amortized
Cost Basis Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase [Member] Entity Address, City or Town Entity Address, City or Town Document [Domain] Document [Domain] Sales Financing Receivable, Sale and Reclassification to Held-for-Sale Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Judicial Ruling [Member] Judicial Ruling [Member] Current fiscal year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Measurement Category [Domain] Measurement Category [Domain] [Domain] for Measurement Category [Axis] Measurement Category [Axis] Measurement Category [Axis] Measurement Category [Axis] Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Three Months or More Past Due, or in Foreclosure(2) Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Segment Reporting, Reconciliation of Asset by Segment to Consolidated Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Held by Freddie Mac Held by Freddie Mac Parent Company [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Gross amount not offset in the consolidated balance sheets 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] Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 CLTV ratio greater than 60 to 80 percent Debt-to-Value Ratio, Less than 80 Percent [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Other comprehensive income (loss), net of taxes and reclassification adjustments Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Table - Fair Value Measurements of Assets and Liabilities Using Significant Unobservable Inputs Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] financing receivable, loan restructuring [Line Items] financing receivable, loan restructuring [Line Items] financing receivable, loan restructuring Concentration risk percentage Unpaid Principal Balance, Percent Of Portfolio Unpaid Principal Balance, Percent Of Portfolio Unpaid Principal Balance, Percent Of Portfolio Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Non-cash investing and financing activities (Note 3 and Note 6) Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Document Period End Date Document Period End Date Counterparty netting Counterparty netting Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Liability Offset Gross realized losses Debt Securities, Available-for-Sale, Realized Loss Position [Axis] Position [Axis] Net Amount Presented in the Consolidated Balance Sheets Securities Sold under Agreements to Repurchase Securities Sold under Agreements to Repurchase Agency Agency Securities [Member] Mortgage loan purchase commitments Mortgage loan purchase commitments Mortgage loan purchase commitments Components of Net Interest Income [Abstract] Components of Net Interest Income Leverage capital amounts: [Abstract] Leverage capital amounts: [Abstract] Leverage capital amounts: Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Amortized cost basis of SF HFI loans in trial period modification plans Amortized cost basis of SF HFI loans in trial period modification plans Amortized cost basis of SF HFI loans in trial period modification plans as of period end. Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Southwest Southwest [Member] Southwest includes (AR, CO, KS, LA, MO, NE, NM, OK, TX, WY) Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Maximum Remaining Term Guarantor Obligations, Term1 Guarantor Obligations, Term1 Trading securities, at fair value Trading, at fair value Debt Securities, Trading, and Equity Securities, FV-NI Securitization products Financial Guarantee [Member] Total liabilities Liabilities Financing Receivable, Modified, Weighted-Average Interest Rate Decrease from Modification Financing Receivable, Modified, Weighted-Average Interest Rate Decrease from Modification Available-for-Sale, at fair value Debt Securities, Available-for-Sale, Excluding Accrued Interest Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name Included in Other Comprehensive Income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Hedged Asset, Fair Value Hedge, Portfolio Layer, Cumulative Increase (Decrease) Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease) Transaction [Domain] Transaction [Domain] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Concentration Risk [Line Items] Concentration Risk [Line Items] Interest accrual on fair value hedging derivatives for held-for-investment loan Interest accrual on fair value hedging derivatives for held-for-investment loan Interest accrual on fair value hedging derivatives for held-for-investment loans Current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Adjusted total assets Adjustedtotalassets Adjusted total assets Allowance for Credit Losses Allowance for Credit Losses [Text Block] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Debt issued by cons trusts, Fair Value Debt issued by Cons Trusts, Fair Value Debt issued by Cons Trusts, Fair Value Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Credit Loss [Abstract] U.S Treasury securities and other US Treasury Securities [Member] Multifamily Multifamily Segment [Member] Multifamily Segment component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Financing Receivable, Modified [Line Items] Financing Receivable, Modified [Line Items] Zero Coupon Zero Coupon [Member] Zero-coupon debt member Short Term Debt Interest Rate Type [Domain] Short Term Debt Interest Rate Type [Domain] Short Term Debt Interest Rate Type Mortgage loans held-for-investment Mortgage loans held-for-investment [Member] It represents Mortgage loans which are classified as held-for-investment Table - Fair Value Measurements of Assets and Liabilities Using Significant Unobservable Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Closed Portfolio and Beneficial Interest, Portfolio Layer, Amortized Cost Financial Asset, Closed Portfolio and Beneficial Interest, Portfolio Layer Method, Amortized Cost Award Timing Predetermined Award Timing Predetermined [Flag] Par Value Of Long Term Debt Par Value Of Total Other Long Term Debt Par value of total other long-term debt. Net interest income Interest and Dividend Income, Operating [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Available-for-sale securities scheduled to contractually mature after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Table - Concentration of Credit Risk Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Table - ERCF Capital Requirements Schedule of Compliance with Regulatory Capital Requirements - ERCF [Table Text Block] Schedule of Compliance with Regulatory Capital Requirements - ERCF Available-For-Sale, at Fair Value: Debt Securities, Available-for-Sale [Abstract] Derivative assets at fair value Derivative assets, net Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Gain (loss) on fair value hedging relationships - hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Table - Available for Sale Securities in a Gross Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Interest rate risk on debt Interest rate risk on debt [Member] Interest rate risk on debt Long-Term Debt, Fair Value Debt, Fair Value Long-Term Debt, Fair Value North Central North Central [Member] North Central region, consisting of the following states: IL, IN, IA, MI, MN, ND, OH, SD, WI. Concentration Risk Type [Domain] Concentration Risk Type [Domain] Amortized cost basis of loans in payment deferral plans Amortized cost basis of loans in payment deferral plans Amortized cost basis of loans in payment deferral plans completed during the reporting period. Offsetting Assets [Table] Offsetting Assets [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Gain (loss) on fair value hedging relationships - derivatives designated as hedging instruments Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Investment Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Expiration Date Trading Arrangement Expiration Date Long-term debt - 2029 Long-Term Debt, Maturity, Year Four Hedging Relationship [Axis] Hedging Relationship [Axis] Income Statement Location [Axis] Freddie Mac Statement Of Income Location Balance Axis [Axis] Freddie Mac Statement Of Income Location Balance Axis Restricted cash and cash equivalents Restricted Cash and Cash Equivalent Cash and Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Issues Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] One Month Past Due UPB of Unconsolidated loans 30 to 59 days past due Unpaid principal balance of unconsolidated loans underlying our guarantees that are 30 to 59 days past due Cost basis adjustment HFI Deferred Fees, Unamortized Premiums, Discounts And Other Cost Basis Adjustments HFI Reflects the cumulative amount of fees paid by borrowers which have not yet been taken into income and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield for held for investment loans Common stock, par value (in dollars per share) Common Stock, No Par Value Tier 1 capital Tier 1 capital (risk-based) ratio Tier 1 capital (risk-based) ratio Long-Term Debt, Fair Value Debt Instrument, Unamortized Discount (Premium), Net Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables Fair Value, Option, Aggregate Differences, Loans and Long-Term Receivables Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Litigation Status [Axis] Litigation Status [Axis] CumulativeBasisAdjustmentonFairValueHedge [Axis] CumulativeBasisAdjustmentonFairValueHedge [Axis] CumulativeBasisAdjustmentonFairValueHedge Segment [Domain] Segments [Domain] Interest-rate management derivatives Interest Rate Swap [Member] Debt Debt Disclosure [Text Block] CET1 capital CET1 capital CET1 capital Trading securities Trading securities [Member] It represents Investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Mortgage Loans Held-for-sale Total held-for-sale loans, net Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Long-Term Debt, Maturity, after Year Five Long-Term Debt, Maturity, after Year Five Total equity Beginning balance Ending balance Equity, Attributable to Parent Derivative interest payable and other Derivative Liability Interest Payable and other Represents carrying value of accrued interest payable on derivative liabilities that has been incurred and is unpaid and other, as of the balance sheet date. Gross Amount Recognized Securities Purchased under Agreements to Resell, Gross Including Not Subject to Master Netting Arrangement Total Liability Netting Adjustment TotalLiabilityNettingAdjustment Represents derivative liability and securities sold under agreement to repurchase netting adjustments, includes counterparty netting, cash collateral netting, and net derivative interest payable. Offsetting Assets [Line Items] Offsetting Assets [Line Items] Assets [Abstract] Assets [Abstract] Assets [Abstract] Interest rate risk on held-for-investment mortgage loans Interest rate risk on held-for-investment mortgage loan [Member] Interest rate risk on held-for-investment mortgage loans Table - Amortized Cost Basis of Held-For-Investment Mortgage Loans, by Credit Quality Indicator and Vintage Financing Receivable Credit Quality Indicators [Table Text Block] Fair Value, Measurements, Nonrecurring Fair Value, Nonrecurring [Member] Insider Trading Policies and Procedures [Line Items] Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Entity Central Index Key Entity Central Index Key Held for Investment Mortgage loans held-for-investment Held for Investment [Member] Represents loans that are classified as Held-for-Investment. Cumulative Basis Adjustments Due to Fair Value Hedging [Line Items] CumulativeBasisAdjustmentonFairValueHedge [Line Items] CumulativeBasisAdjustmentonFairValueHedge OTC derivatives Over-the-Counter [Member] Schedule of Guarantor Obligations [Table] Guarantor Obligation [Table] 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] Core capital (statutory) Core capital (statutory) ratio Core capital (statutory) ratio Financing Receivable, Accrued Interest, Writeoff Financing Receivable, Accrued Interest, Writeoff Pledging Purpose [Axis] Pledging Purpose [Axis] Compliance with Regulatory Capital Requirements - ERCF [Abstract] Compliance with Regulatory Capital Requirements - ERCF [Abstract] Compliance with Regulatory Capital Requirements - ERCF Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Carrying amount mortgage loans held-for-investment hedged asset Hedged Asset, Fair Value Hedge Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Table - Gross Realized Gains and Gross Realized Losses on Sales of Available-For-Sale Securities Realized Gain (Loss) on Investments [Table Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Total Assets Assets West West [Member] West includes (AK, AZ, CA, GU, HI, ID, MT, NV, OR, UT, WA) Reclassifications from held-for-investment to held-for sale, UPB Mortgage Loans Unpaid Principal Balance Reclassified from HFI to HFS Represents the unpaid principal balance of mortgage loans that were recalssified from held-for-investment to held-for-sale. Interest Expense Total Interest Expense Interest Expense, Operating Interest Expense, Operating Written options Written Option [Member] Includes both types of financial contracts between two parties (calls/puts), the buyer and the seller (writer) of the option, where the buyer has the right but not the obligation to buy/sell a commodity or financial instrument (the underlying instrument) to the seller (writer) at a certain time for a certain price (the strike price). The seller (writer) has the obligation to sell/purchase the underlying asset at that strike price, if the buyer exercises the option. Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Leverage capital ratios [Abstract] Leverage capital ratios [Abstract] Leverage capital ratios Operating segments Operating Segments [Member] Basis adjustment amount for hedged liability - discontinued hedge Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Gross Unrealized Gains in Other Comprehensive Income Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax PEO PEO [Member] Long-term debt - 2027 Long-Term Debt, Maturity, Year Two Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Gross unrealized losses, number of positions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Retained Earnings [Member] Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Table - Fair Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Net income (loss) per common share - diluted (in dollars per share) Earnings Per Share, Diluted Other Other Other Contract [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Securities Purchased under Agreements to Resell, Fair Value of Collateral Securities Purchased under Agreements to Resell, Fair Value of Collateral Derivative interest receivable and other Derivative Assets Interest and Other Receivable Represents carrying amount of interest earned on derivative assets but not received and other, as of the balance sheet date. Three years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Table - Offsetting and Collateral Information of Financial Assets and Liabilities Offsetting Assets [Table Text Block] Adjusted total capital Adjusted total capital Adjusted total capital Table - Collateral in the Form of Securities Pledged Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Mortgage Loans Net Mortgage Loans Net Mortgage Loans Net Reflects the aggregate carrying amount of all categories of loans that are classified as held for investment or held for sale. Financial Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Risk-based capital amounts [Abstract] Risk-based capital amounts [Abstract] Risk-based capital amounts Total Asset Netting Adjustment TotalAssetNettingAdjustment Represents derivative asset and securities purchased under agreement to resell netting adjustments, includes counterparty netting, cash collateral netting, and net derivative interest payable. Proceeds from maturities and repayments of investment securities Proceeds From Maturity And Collection Of Investments Proceeds From Maturity And Collection Of Investments Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Variable Rate Variable Rate [Member] Variable-rate debt member Securitization products Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Unpaid Principal Balance Unpaid Principal Balance Mortgage Represents Unpaid Principal Balance of Loans, securities and other. Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Class of Shareholder [Domain] Class of Shareholder [Domain] Class of Freddie Mac Shareholder Derivative liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Table - Contractual Maturity of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Common Stock Outstanding Common Stock Outstanding [Member] Common Stock Outstanding [Member] Other income Other income Noninterest Income, Other Debt-to-Value [Domain] Debt-to-Value [Domain] Long-term debt weighted average effective rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Multifamily Multifamily Multifamily [Member] Derivative gains (losses) Derivative, Gain (Loss) on Derivative, Net Proceeds from issuance Proceeds from Issuance of Debt Loan Restructurings Loan Restructurings [Policy Text Block] Disclosure of accounting policy for Loan Restructurings that eliminates the recognition and measurement of TDRs. CumulativeBasisAdjustmentonFairValueHedgeTable [Table] CumulativeBasisAdjustmentonFairValueHedge [Table] CumulativeBasisAdjustmentonFairValueHedge Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving Table - Details of the Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued Common Stock, Shares, Issued Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Beginning Balance Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Table - Financial Guarantees Schedule of Guarantor Obligations [Table Text Block] Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Single Family Guarantee Segment Single Family Guarantee Segment [Member] Single-Family Guarantee Segment component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Compliance with Regulatory Capital Requirements - ERCF [Table] Compliance with Regulatory Capital Requirements - ERCF [Table] Compliance with Regulatory Capital Requirements - ERCF California CALIFORNIA Gross Amount Recognized Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Two Months Past Due UPB of Unconsolidated loans 60 to 89 days past due Unpaid principal balance of unconsolidated loans underlying our guarantees that are 60 to 89 days past due STACR debt notes and SCR debt notes Unpaid Principal Balance of STACR and SCR debt Represents the unpaid principal balance at the balance sheet date of STACR and SCR debt, which may vary from the carrying amount because of unamortized premium or discount. Debt Long-Term Debt [Member] Non-interest expense Noninterest Expense [Abstract] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Unrealized Gains (Losses) Still Held - Liabilities Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Liabilities, Total Liabilities, Total [Member] Termination Date Trading Arrangement Termination Date Gross Amount Not Offset in the Consolidated Balance Sheets Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Unsettled securities purchased under agreements to resell, net Unsettled securities purchased under agreements to resell, net Unsettled securities purchased under agreements to resell, net Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net Amount Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Net interest income after (provision) benefit for credit losses Net interest income after benefit (provision) for credit losses Net interest income after benefit (provision) for credit losses Investment securities, at fair value Total fair value of investment securities Marketable Securities Southeast Southeast [Member] Southeast region, consisting of the following states: AL, FL, GA, KY, MS, NC, PR, SC, TN, VI. Fair Value as of Grant Date Award Grant Date Fair Value Table - Available-For-Sale Securities in a Gross Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Loans Held For Investment Fair Value Disclosure Loans Held For Investment Fair Value Disclosure It represents loans held for investment fair value disclosure Debt issued by consolidated trusts Debt issued by consolidated trusts Debt issued by consolidated trusts Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Tier 1 capital Tier 1 capital (risk-based) Tier 1 capital (risk-based) Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] payment delay [Member] payment delay [Member] Loan restructurings that result in delay of loan payments. Other Assets [Abstract] Other Assets [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount CRT products Structured Finance [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Net (increase) decrease in securities purchased under agreements to resell Proceeds from (Payments for) Securities Purchased under Agreements to Resell Table - Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Table - Loan Restructuring Financing Receivable, Loan Restructuring [Table Text Block] Financing Receivable, Loan Restructuring Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Fair Value Disclosures Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Transaction Type [Axis] Transaction Type [Axis] External Pricing Source(s) Fair Value Inputs External Pricing Sources Fair Value Inputs External Pricing Sources Represents external pricing sources used to measure fair value. Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Location in statement of income where disaggregated amount is reported. Document Information, Document [Axis] Document Information, Document [Axis] Geographical [Axis] Geographical [Axis] Price Price [Member] Median of external sources. Schedule of Short-term Debt [Table] Short-Term Debt [Table] Other Assets Other Assets Other Assets One Month Past Due Financial Asset, 30 to 59 Days Past Due [Member] Cash flows related to derivatives Payments for (Proceeds from) Derivative Instrument, Investing Activities 30 days or less Maturity Less than 30 Days [Member] Carrying amount debt hedged liability Hedged Liability, Fair Value Hedge Liability Class [Axis] Liability Class [Axis] Non-interest income (loss) Noninterest Income [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents (includes restricted cash and cash equivalents) at the beginning of year Cash and cash equivalents (includes restricted cash and cash equivalents) at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-NEOs Non-NEOs [Member] Financing Receivable, Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Derivative Assets Derivative Fair Value Of Derivative Asset Gross Fair value of derivative asset, presented on a gross basis (including interest receivables and trade settle receivale) regardless of whether the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. Discontinued hedge related basis adjustments amortization Discontinued hedge related basis adjustment amortization Income or expense related to the amortization of discontinued hedge related basis adjustments on fair value hedges Georgia GEORGIA Long-term debt - 2026 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Mortage-related securities Collateralized Mortgage-Backed Securities [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Mortgage Loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Text Block] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Table - Cumulative Basis Adjustments Due to Fair Value Hedging Cumulative Basis Adjustment on Fair Value Hedge [Table Text Block] Cumulative Basis Adjustment on Fair Value Hedges Portfolio UPB Concentration Risk, Unpaid Principal Balance This concept represents the concentration risk based on the unpaid principal balance. Florida FLORIDA Securities Sold under Agreements to Repurchase Interest Expense, Securities Sold under Agreements to Repurchase Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Debt Securities, Available-for-sale Debt Securities, Available-for-Sale Four years before current fiscal year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff CLTV ratio less than or equal to 60 percent Debt-to-Value Ratio, Less than 60 Perent [Member] Debt-to-Value Ratio, Less than 60 Perent Unrealized Gains (Losses) Still Held, Assets, OCI Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Not Designated as Hedging Instrument, Economic Hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Professional services, technology, and occupancy Professional services, technology, and occupancy Professional services, technology, and occupancy Transfers from advances to lenders to loans HFI Transfers From Advances To Lenders To Loans Held For Investment Represents loans that were delivered by lenders to satisfy a secured lending arrangement (advances to lenders) via guarantor swap transaction. Net realized gains (losses) Debt Securities, Available-for-Sale, Realized Gain (Loss) Total liabilities and equity Liabilities and Equity payment delay and term extension [Member] payment delay and term extension [Member] Loan restructurings that result in payment delay and term extension. Employee Stock Option Share-Based Payment Arrangement, Option [Member] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Statement, Business Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Table - Gains and Losses on Fair Value Hedge Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] OAS Fair Value Inputs Option Adjusted Spread Percentage Option-adjusted spread represents an estimate of the incremental yield spread between a particular financial instrument (e.g., a security, loan or derivative contract) and a benchmark yield curve (e.g., LIBOR or agency or U.S. Treasury securities). This includes consideration of potential variability in cash flows of the instruments resulting from any options embedded in the instrument, such as prepayment options. Trading securities Total fair value of trading securities Debt Securities, Trading Tabular List, Table Tabular List [Table Text Block] Net Trading Gains (Losses) Unrealized Gain (Loss) on Investments [Table Text Block] Common Shareholder [Member] Common Shareholder [Member] Common Shareholder Name Awards Close in Time to MNPI Disclosures, Individual Name Reclassifications from held-for-investment to held-for sale, allowance for credit losses reverse or (established) Allowance for Credit Losses Reversed or Established Allowance for credit losses that was reversed or established due to loan reclassification between held-for-investment and held-for-sale 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] Table - Trading Securities Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Debt-to-Value [Axis] Debt-to-Value [Axis] Cash paid for: Cash Paid Received For [Abstract] Cash paid or received. Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Senior preferred stock (liquidation preference of $146,570 and $140,248) Senior Preferred Stock Senior Preferred Stock represents ownership interest in the company and provides a preferential dividend to our common stock and all other outstanding series of our preferred stock and takes precedence over the common stock and preferred stock in the event of a liquidation. Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Debt interest Interest Paid, Excluding Capitalized Interest, Operating Activity Hedging Designation [Axis] Hedging Designation [Axis] Two Months Past Due Financial Asset, 60 to 89 Days Past Due [Member] Total Assets carried at fair value on a recurring basis Total Assets carried at fair value on a recurring basis Assets, Fair Value Disclosure Name Measure Name Illinois ILLINOIS Pay vs Performance Disclosure [Line Items] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Contractual maturities of long term debt Debt Instrument [Line Items] Mortgage loans Interest and Fee Income, Financing Receivable Purchases of mortgage loans acquired held-for-investment Payment for Acquisition, Loan, Held-for-Investment Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Netting adjustments to derivative assets Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Accrued Interest Receivable Interest Receivable Name Trading Arrangement, Individual Name Other Liabilities, Fair Value Other Liabilities, Fair Value Disclosure Position [Domain] Position [Domain] Table - Remaining Contractual Pledged Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Company Selected Measure Amount Company Selected Measure Amount Table - Segment Earnings and Reconciliation to GAAP Condensed Consolidated Statements of Comprehensive Income Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Mortgage loans held-for-sale Mortgage loans held-for-sale [Member] It represents mortgage loans which are classified as held-for-sale. Other FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossAdjustmentsOther Financing receivable excluding accrued interest allowance for credit loss adjustments other Preferred stock, at redemption value Preferred Stock, Redemption Amount Long-term debt - 2030 Long-Term Debt, Maturity, Year Five Non-PEO NEO Non-PEO NEO [Member] CRT-Related Derivatives Credit Risk Contract [Member] Non-interest expense Non-interest expense Noninterest Expense Gain (Loss) on Fair Value Hedges Recognized in Earnings Gain (Loss) on Fair Value Hedges Recognized in Earnings Non-mortgage-related securities sold but not settled Non-mortgage-related securities sold but not settled Non-mortgage-related securities sold but not settled Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents (includes restricted cash and cash equivalents) Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Total Total UPB of Unconsolidated loans by payment status Total unpaid principal balance of unconsolidated loans underlying our guarantees by payment status Regulatory Capital Requirements [Domain] Regulatory Capital Requirements [Domain] Regulatory Capital Requirements Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Restatement Determination Date: Restatement Determination Date [Axis] Included in Other Comprehensive Income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Debt Securities, Trading, Realized Gain (Loss) Debt Securities, Trading, Realized Gain (Loss) Total held-for-investment mortgage loans, net Mortgage loans held-for-investment (net of allowance for credit losses of $6,771 and $7,968 and includes $6,747 and $7,005 at fair value) Mortgage Loans on Real Estate, Commercial and Consumer, Net Fair Value, Option, Changes in Fair Value, Gain (Loss) Fair Value, Option, Changes in Fair Value, Gain (Loss) Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Other mortgage-related guarantees Guarantee Type, Other [Member] Senior Preferred Stock [Member] Senior Preferred Stock [Member] Senior preferred shares that were issued to Treasury by Freddie Mac in partial consideration of Treasury's commitment to provide funds to Freddie Mac. The liquidation preference of this senior preferred stock is increased upon Freddie Mac's receipt of funds from Treasury. Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Counterparty netting Derivative liabilities, netting Adjustment Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Cash collateral netting Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Compliance with Regulatory Capital Requirements - ERCF [Line Items] Compliance with Regulatory Capital Requirements - ERCF [Line Items] Schedule of Compliance with Regulatory Capital Requirements - ERCF Common stock, $0.00 par value, 4,000,000,000 shares authorized, 725,863,886 shares issued and 650,059,553 shares outstanding Common Stock, Value, Issued Table - Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Restatement Determination Date Restatement Determination Date Available-for-sale securities scheduled to contractually mature after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Other expense Other expense Other Noninterest Expense Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Amendment Flag Amendment Flag Total capital (statutory) Total capital (statutory) Total capital (statutory) Trading Securities [Line Items] Debt and Equity Securities, FV-NI [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Abstract] New York NEW YORK Gross Unrealized Losses in Other Comprehensive Income Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Schedule of Loss Contingencies by Contingency [Table Text Block] Loss Contingencies [Table] Trading, at Fair Value: Debt Securities, Trading, and Equity Securities, FV-NI, Cost [Abstract] Core capital (statutory) Core capital (statutory) Core capital (statutory) Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Entity Address, State or Province Entity Address, State or Province Securities Purchased under Agreements to Resell, Amount Offset Against Collateral Security Purchased under Agreement to Resell, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Financing Receivable, Excluding Accrued Interest, Nonaccrual Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount Amortization Method Qualified Affordable Housing Project Investments Investment, Proportional Amortization Method, Elected, Amount Junior Preferred Shareholder [Member] Junior Preferred Shareholder [Member] Junior Preferred Shareholder Assets, Fair Value Disclosure [Abstract] Assets, Fair Value Disclosure [Abstract] Multifamily Unpaid Principal Balance [Member] Multifamily Unpaid Principal Balance [Member] Multifamily Unpaid Principal Balance Notional or contractual amount Derivative, Notional Amount Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Asset Pledged as Collateral Asset Pledged as Collateral with Right [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Unsettled SSUAR Unsettled SSUAR Present unsettled securities sold under agreements to repurchase Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Noncash acquisition, mortgage loans held-for-investment acquired in exchange for issuance of debt securities of consolidated trusts Noncash or Part Noncash Acquisition, Investments Acquired Interest Income Recognized Financing Receivable, Nonaccrual, Interest Income Non-interest income (loss) Non-interest income (loss) Noninterest Income Total Par Value Of Total Long Term Debt Par value of total long-term debt including debt securities of consolidated trusts held by third parties and other long-term debt. Pending Litigation [Member] Pending Litigation [Member] Adjustable-rate and other Adjustable-rate and other Single family Adjustable Rate and Other [Member] Single-family Adjustable-rate and Other Member Advances under secured lending arrangements Advances under secured lending arrangements Advances to lenders represent payments of cash in exchange for the receipt of mortgage loans from lenders in a transfer that is accounted for as a secured lending arrangement. Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Regulatory Capital Requirements [Axis] Regulatory Capital Requirements [Axis] Regulatory Capital Requirements Net income (loss) attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Debt issued by consolidated trusts Interest expense of debt securities Interest expense of debt securities of consolidated trusts held by third parties Guarantee income Guarantee income Guarantee income This item represents the portion of monthly guaranty fees collected representing the interest imputed and recognized under the prospective interest method on the present value of the contractually stipulated guarantee payments at inception of the contract. Collateralized Agreements and Offsetting Arrangements Balance Sheet Offsetting [Text Block] The entire disclosure of an entity's offsetting of financial assets and liabilities Debt of Freddie Mac [Line Items] OtherDebt [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Treasury stock, at cost, 75,804,333 shares Treasury Stock, Value Other Significant Accounting Policies New Accounting Pronouncements, Policy [Policy Text Block] Financial Instruments, Owned, at Fair Value Financial Instruments, Owned, at Fair Value Futures Future [Member] Short-term Debt [Abstract] Short-Term Debt [Abstract] Long-term Debt Long-Term Debt After 30 days through 90 days Maturity 30 to 90 Days [Member] Two years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Single-Family serious delinquency rate Single Family Serious Delinquency Rate Indicates the single family Mortgage Portfolio Serious Delinquency Rate based on loan count Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure 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] Cash collateral netting Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset 15-year or less, amortizing fixed-rate 15-year or less, amortizing fixed-rate Single Family 15 Year Or Less Amortizing Fixed Rate [Member] Single-family 15 year or Less amortizing fixed rate Netting adjustments to derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Other assets/other liabilities Written Loan Commitment, Fair Value Option [Member] Class of Shareholder [Axis] Class of Shareholder [Axis] Class of Freddie Mac shareholder Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Financing Receivable, before Allowance for Credit Loss Total Financing Receivable, before Allowance for Credit Loss Hedged Asset, Fair Value Hedge, Portfolio Layer, Amount Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Amount Total liabilities carried at fair value on a recurring basis Liabilities, Fair Value Disclosure Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default 12 Months or Greater Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Mortgage commitment derivatives Mortgage commitment derivatives Commitment [Member] Represents purchase and sale commitment designated as derivatives. Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Northeast Northeast [Member] Northeast includes (CT, DE, DC, MA, ME, MD, NH, NJ, NY, PA, RI, VT, VA, WV) Gross amount not offset in the consolidated balance sheets Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset CLTV ratio greater than 80 to 90 Percent Debt To Value Ratio, 80 to 90 Percent [Member] Debt To Value Ratio, 80 to 90 Percent Reclassifications from held-for-sale to held-for-investment, valuation allowance (established) or reversed Valuation Allowance Established or Reversed Valuation Allowance that was reversed or established due to loan reclassification between held-for-investment and held-for-sale Geographical [Domain] Geographical [Domain] Components of Net Interest Income 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] Financing Receivable 1 Financing Receivable 1 The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Callable Medium Term Notes Callable Medium Term Notes [Member] Callable debt instruments with maturities ranging from one to thirty years. Long-term debt Interest Expense, Long-Term Debt Purchases Financing Receivable, Purchase Held-for-Sale Mortgage loans held-for-sale Held for Sale [Member] Represents loans that are classified as Held-for-Sale. Mortgage loans Residential Mortgage [Member] Asset Class [Domain] Asset Class [Domain] Cleared and exchange-traded derivatives Exchange Traded And Cleared [Member] Transaction that takes place on an organized exchange and transaction where an organization acts as an intermediary, reconciling orders between transacting parties. Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Accounts, Notes, Loans and Financing Receivables [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Mortgage Loans in Process of Foreclosure, Amount Mortgage Loans in Process of Foreclosure, Amount Components of Net Interest Income [Line Items] Components of Net Interest Income [Line Items] Components of Net Interest Income Underlying Security Market Price Change Underlying Security Market Price Change, Percent 20- and 30-year or more, amortizing fixed-rate 20- and 30-year or more, amortizing fixed-rate Single Family 20 And 30 Year Or More Amortizing Fixed Rate [Member] Single-family 20 year and 30 year or more, amortizing fixed-rate Capital Requirement Including Buffer [Member] Capital Requirement Including Buffer [Member] Capital Requirement Including Buffer Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Short-term Debt Short-Term Debt Recognized Liability Guarantor Obligations, Current Carrying Value Maximum Exposure to Loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Cost basis and fair value adjustments, net HFS DeferredfeesunamortizedpremiumsdiscountsandothercostbasisadjustmentsHFS Reflects the cumulative amount of fees paid by borrowers which have not yet been taken into income and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield as well as fair value adjustments for held for sale loans Guarantees and Other Off-Balance Sheet Credit Exposures Guarantees [Text Block] Accrued Interest Receivable Accrued Investment Income Receivable Treasury Stock, Common [Member] Treasury Stock, Common [Member] Gross Amount Not Offset in the Consolidated Balance Sheets Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Litigation Status [Domain] Litigation Status [Domain] Table - Difference between Fair Value and UPB for Certain Financial Instruments with Fair Value Option Elected Fair Value Option, Disclosures [Table Text Block] Deconsolidation Of Investments Deconsolidation Of Investments Deconsolidation Of Investments Two years before current fiscal Year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff AmortizedCost AmortizedCost [Member] Represent the measurement category for amortized cost All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Swaps Swap [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Reclassifications from held-for-sale to held-for-investment, UPB Mortgage Loans Unpaid Principal Balance Reclassified from HFS to HFI unpaid principal balance of mortgage loans reclassified from held for sale to held for investment Interest Expense Freddie Mac Interest Expense [Member] Primary financial statement caption encompassing interest expense. Settlements, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Long Term Debt Interest Rate Type [Domain] Long Term Debt Interest Rate Type [Domain] Long Term Debt Interest Rate Type [Domain] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Segment Reporting Segment Reporting [Text Block] Minimum Minimum [Member] Debt, Unpaid Principal Balance, with Fair Value Option Elected Long-Term Debt, Unpaid Principal Balance, with Fair Value Option Elected Represents unpaid principal balance of loans with fair value option elected. Guarantee obligation Guarantees, Fair Value Disclosure Total investments in securities Total investments in securities Investments, Fair Value Disclosure Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Derivative liabilities at fair value Derivative liabilities at fair value Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Securitization Activities and Consolidation Variable Interest Entity Disclosure [Text Block] Liabilities [Abstract] Liabilities [Abstract] Liabilities [Abstract] Loans, Unpaid Principal Balance, with Fair Value Elected Loans, Unpaid Principal Balance, with Fair Value Elected Represents Loans, Unpaid Principal Balance, with Fair Value Elected Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Amounts attributable to senior preferred stock Other Preferred Stock Dividends and Adjustments CET1 capital CET1 capital ratio CET1 capital ratio 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] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Total Financial Liabilities Financial Liabilities Fair Value Disclosure Financing Receivable, Accrued Interest, after Allowance for Credit Loss Financing Receivable, Accrued Interest, after Allowance for Credit Loss Other Liabilities Other Liabilities Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Common stock, shares authorized Common Stock, Shares Authorized Concentration of Credit and Other Risks Concentration Risk Disclosure [Text Block] Gross realized gains Debt Securities, Available-for-Sale, Realized Gain Guarantee Assets Guarantee Assets Fair Value Disclosure Represents guarantee assets that are measured at fair value. Exercise Price Award Exercise Price Interest accrual on fair value hedging derivatives for debt Interest accruals on fair value hedging derivatives for debt Interest accrual on fair value hedging derivatives for debt Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] 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] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Texas TEXAS Special mention Special Mention [Member] Proceeds from Sale of Available-for-sale Securities Proceeds from Sale of Debt Securities, Available-for-Sale Three years before current fiscal year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Other Assets Other Assets, FV [Member] Other Assets, FV Accrued interest payable Interest Payable Interest Income Freddie Mac Interest Income [Member] Primary financial statement caption in which reported facts about interest income have been included. Table - Investment Securities Marketable Securities [Table Text Block] Derivative Liability [Abstract] Derivative Liability [Abstract] CLTV ratio greater than 100 percent Greater Than 100 Loan To Value Ratio [Member] Current loan-to-value ratio greater than 100 percent. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Mortgage Loans held-for-investment, fair value Mortgage loans FVO held-for-investment Loans Receivable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Securitization Activities and Consolidation [Abstract] Securitization Activities and Consolidation [Abstract] Securitization Activities and Consolidation [Abstract] Net Interest Income Interest Income and Interest Expense Disclosure [Text Block] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Other, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Loss Contingency, Damages Awarded, Value Loss Contingency, Damages Awarded, Value Short-term debt Interest Expense, Short-Term Borrowings Non-mortgage-related securities purchased but not settled Non-mortgage-related securities purchased but not settled Non-mortgage-related securities purchased but not settled Mortgage loans held-for-sale Loans Receivable [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Repayments and redemptions Repayments of Debt Legal Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Weighted Average Weighted Average [Member] Interest Income, Securities Purchased under Agreements to Resell Interest Income, Securities Purchased under Agreements to Resell Underlying Asset Class [Axis] Underlying Asset Class [Axis] All Adjustments to Compensation All Adjustments to Compensation [Member] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Senior preferred stock, liquidation preference Preferred Stock, Liquidation Preference, Value Three Months or More Past Due, or in Foreclosure UPB of Unconsolidated loans equal to or greater than 90 days past due Unpaid principal balance of unconsolidated loans underlying our guarantees that are equal to or greater than 90 days past due Pledging Purpose [Domain] Pledging Purpose [Domain] Substandard Substandard [Member] Equity Equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Investment gains (losses), net Investment gains (losses), net Gain (Loss) on Investments Deferred tax assets, net Deferred Income Tax Assets, Net Non-mortgage-related securities NonMortgageRelatedSecurities [Member] Represents securities backed by non-mortgage assets. Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Outstanding balance of the guarantor advance Outstanding balance of the guarantor advance Represent the exposure related to advances made by us as guarantor that is excluded from the nonconsolidated securitization products Long Term Debt Interest Rate Type [Axis] Long Term Debt Interest Rate Type [Axis] Long Term Debt Interest Rate Type City Area Code City Area Code Weighted average payment deferral or principal forbearance Weighted average payment delay or principal forbearance Weighted average payment deferral or principal forbearance for loans restructured during the reporting period. Operating segments Operating Segments And Corporate NonSegment [Member] Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity and corporate headquarters or functional department that may not earn revenues or may earn revenues that are only incidental to the activities of the entity and is not considered an operating segment. Geographic Concentration Risk Geographic Concentration Risk [Member] Document Information [Table] Document Information [Table] Debt instrument recorded at fair value Debt Debt Instrument, Fair Value Disclosure Name Forgone Recovery, Individual Name Interest-Only Interest-Only-Strip [Member] Multifamily Delinquency Rate Multifamily Delinquency Rate Indicates the percentage of Multifamily loans that are two monthly payments or more delinquent, or in foreclosure, based on the UPB of the loans. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Median of external sources Median of External Sources [Member] Median of external sources. All Other Assets All Other Assets Fair Value Disclosure Represents all other assets excluding guarantee assets that are measured at Fair Value. Interest income Interest income Interest and Dividend Income, Operating Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, 90 Days or More Past Due, Still Accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Risk-weighted assets (standardized approach) Risk-weighted assets (standardized approach) Risk-weighted assets (standardized approach) Measurement Basis [Axis] Measurement Basis [Axis] Netting adjustments Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Mortgage Loans [Abstract] Mortgage Loans [Abstract] Mortgage Loans Proceeds from sales of mortgage loans acquired held-for-investment Proceeds from Sale, Loan, Held-for-Investment payment delay, interest rate reduction, and term extension [Member] payment delay, interest rate reduction, and term extension [Member] Loan restructurings that result in delay of loan payments, interest rate reduction, and term extension. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Table - Quantitative Information about Recurring Level 3 Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Short Term Debt Interest Rate Type [Axis] Short Term Debt Interest Rate Type [Axis] Short Term Debt Interest Rate Type Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Liabilities, Fair Value Disclosure [Abstract] Liabilities, Fair Value Disclosure [Abstract] Net increase (decrease) in borrowings with original maturity of three months or less Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less CLTV ratio greater than 90 to 100 percent Debt-to-Value Ratio, 90 to 100 Percent [Member] Debt-to-Value Ratio, 90 to 100 Percent Securities Sold under Agreements to Repurchase [Abstract] Securities Sold under Agreements to Repurchase [Abstract] Long-term debt - 2028 Long-Term Debt, Maturity, Year Three Financing Receivable, Modified, Weighted-Average Term Increase from Modification Financing Receivable, Modified, Weighted-Average Term Increase from Modification Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Other Other Interest and Dividend Income Adjusted total capital Adjusted total capital (ratio) Adjusted total capital (ratio) Financial Instrument [Domain] Financial Instruments [Domain] Proceeds from sales of investment securities Proceeds From Sale Of Investments Proceeds From Sale Of Investments Four years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Derivative Asset Derivative Asset Offsetting [Abstract] Offsetting [Abstract] Underlying Securities Award Underlying Securities Amount Tier 1 capital Tier 1 capital (leverage) ratio Tier 1 capital (leverage) ratio Fair Value Estimate of Fair Value Measurement [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Regulatory Capital Regulatory Capital Requirements for Mortgage Companies Disclosure [Text Block] Credit risk transfer [Member] Credit risk transfer [Member] Derivative instrument whose primary underlying risk is tie to credit risk transfer (CRT). We define CRT transactions as those arrangements where we actively transfer the credit risk exposure on mortgages that we own or guarantee. Preferred Stock [Member] Preferred Stock [Member] Other, net Payment for (Proceeds from) Other Investing Activity Debt Securities, Trading, Unrealized Gain (Loss) Debt Securities, Trading, Unrealized Gain (Loss) Segment Reporting [Table] Segment Reporting [Table] Segment Reporting [Table] Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount (Provision) benefit for credit losses (Provision) benefit for credit losses Provision for Loan, Lease, and Other Losses Short-term debt par value Par Value Of Total Other Short Term Debt Par value of total other short-term debt. Guarantees [Abstract] Guarantees [Abstract] Table - Available-For-Sale Securities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Beginning Balance Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Less than 12 Months Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Components of Net Interest Income [Table] Components of Net Interest Income [Table] Components of Net Interest Income Current Fiscal Year End Date Current Fiscal Year End Date Table - Loan Restructuring Financing Receivable, Loan Restructuring [Table] Financing Receivable, Loan Restructuring Debt issued by consolidated trusts Fair Value Debt issued by consolidated trusts Fair Value Debt issued by consolidated trusts Fair Value Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Provision (benefit) for credit losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] 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 Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Allowance for credit loss SEC Schedule, 12-09, Allowance, Credit Loss [Member] Table - Schedule of Various Interest Entities Schedule of Variable Interest Entities [Table Text Block] Treasury Stock, Common, Shares Treasury Stock, Common, Shares Credit enhancement expense Credit enhancement expense Expense incurred from freestanding credit enhancements Statement, Equity Components [Axis] Equity Components [Axis] Other Guarantees Payment Guarantee [Member] Entity Interactive Data Current Entity Interactive Data Current Entity Small Business Entity Small Business Basis adjustment amount for hedged asset - discontinued hedge Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Comprehensive income Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net increase (decrease) in securities sold under agreements to repurchase Net increase (decrease) in securities sold under agreements to repurchase The net cash flow from sale followed by purchase of securities under terms of repurchase agreements. Settlements, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Other Asset Fair Value Other Asset Fair Value [Member] Represents Other asset. Net interest income Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] 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] Legislative and regulatory assessments Legislative and Regulatory Assessment Expense Expenses related to (1) the legislated guarantee fees on single-family loans remitted to Treasury, (2) the fee imposed on total new business purchases allocated to the affordable housing funds and remitted to Treasury and HUD, and (3) the FHFA regulatory assessment. Written Short [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Collateral in Form of Securities Pledged [Table] Financial Instruments Owned and Pledged as Collateral [Table] Net Trading Gains (Losses) Debt Securities, Trading, Gain (Loss) Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Local Phone Number Local Phone Number Table - Offsetting of Derivatives OffsettingDerivatives [Table Text Block] OffsettingDerivatives Interest income Interest Income, Interest-Earning Asset [Abstract] Pledged Status [Domain] Pledged Status [Domain] Income before income tax expense Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] All Other All Other States [Member] Represents concentration risk of all other states, excluding the top 5 states with the highest credit losses Other Allowance for Credit Losses Other Allowance for Credit Losses [Member] Allowance for credit losses related to advances of pre-foreclosure costs and off-balance sheet credit exposures. Executive Category: Executive Category [Axis] Other Comprehensive Income (Loss), Tax Other Comprehensive Income (Loss), Tax Net revenues Revenues, Net of Interest Expense Liabilities and equity Liabilities and Equity [Abstract] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Other mortgage-related securities [Member] Non-agency and other [Member] Represents securities not issued or guaranteed by GSC or GSA PEO Name PEO Name Financial Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Income taxes (net of refunds received) Income Tax Paid, before Refund Received Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Investment securities Interest and Dividend Income, Securities, Operating Table - Payment Status of Mortgage Loans Financing Receivable, Past Due [Table Text Block] Available Capital (Deficit) [Member] Available Capital (actual) [Member] Available Capital (actual) Current Financial Asset, Not Past Due [Member] Debt Securities Debt Securities 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] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] 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] Measurement Frequency [Domain] Measurement Frequency [Domain] Interest expense Interest Expense, Operating and Nonoperating [Abstract] Salaries and employee benefits Labor and Related Expense Purchased Long [Member] Other Valuation Techniques Other Valuation Techniques [Member] Other valuation techniques. Net Amount Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Table - Derivative Assets and Liabilities at Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Net income (loss) per common share - basic (in dollars per share) Earnings Per Share, Basic Insider Trading Arrangements [Line Items] Short-Term Debt, Fair Value Short-Term Debt, Fair Value Total basis adjustment cumulative amount for hedged liability Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff Table - Short-term Debt Schedule of Short-Term Debt [Table Text Block] 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] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recoveries collected Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Unpaid Principal Balance Of off-Balance Sheet Credit Exposure Unpaid Principal Balance Of off-Balance Sheet Credit Exposure Unpaid Principal Balance Of off-Balance Sheet Credit Exposure Other Commitments Other Loan Commitments Other Loan Commitments Tier 1 capital Tier 1 capital (leverage) Tier 1 capital (leverage) Callable Short Term Notes [Member] Callable Short Term Notes [Member] Callable debt instruments with maturities within one year Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Short-term debt weighted average effective rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time Fiscal year before current fiscal year, year-to-date write-offs Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Equity Awards Adjustments Equity Awards Adjustments [Member] Current UPB of Unconsolidated loans current Unpaid principal balance of unconsolidated loans underlying our guarantees that are current Hedging Relationship [Domain] Hedging Relationship [Domain] Other Other [Member] Other member Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Overnight and continuous Maturity Overnight and on Demand [Member] Pass Pass [Member] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Table - Mortgage Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] Total basis adjustment cumulative amount for hedged asset Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Purchases of investment securities Payments to Acquire Investments Derivative Liabilities Derivative Fair Value Of Derivative Liability Gross Fair value of derivative liability, presented on a gross basis (including interest payable and trade settle payable) regardless of whether the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. General and Administrative Expense General and Administrative Expense Hedging Designation [Domain] Hedging Designation [Domain] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Table - Gains and Losses on Derivatives Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Securities Purchased under Agreements to Resell Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Securities purchased under agreements to resell: Securities Purchased under Agreements to Resell [Abstract] Entity Filer Category Entity Filer Category Table - Offsetting and Collateral Information of Financial Assets and Liabilities Offsetting Liabilities [Table Text Block] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Nonaccrual [Line Items] Greater than 90 days Maturity Greater than 90 Days [Member] Purchased options Purchased Options [Member] Includes both types of financial contracts between two parties (calls/puts), the buyer and the seller (writer) of the option, where the buyer has the right but not the obligation to buy/sell a commodity or financial instrument (the underlying instrument) to the seller (writer) at a certain time for a certain price (the strike price). The seller (writer) has the obligation to sell/purchase the underlying asset at that strike price, if the buyer exercises the option. Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Interest-rate risk management derivatives Not Designated as Hedging Instrument [Member] Total capital (statutory) Total capital (statutory) ratio Total capital (statutory) ratio Investments in Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Unrealized Gains (Losses) Still Held - Assets Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Amount offset in the consolidated balance sheets Counterparty netting Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset Allowance for credit losses Allowance for credit losses Allowance for Loan and Lease Losses, Real Estate SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] Single-family Single family Single Family [Member] Derivative liabilities, net Derivative Liability Derivative Liability Derivative Liability Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Fair Value Hedging Fair Value Hedging [Member] Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Collateral in the Form of Securities Pledged [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Risk-based capital ratios [Abstract] Risk-based capital ratios [Abstract] Risk-based capital ratios Other liabilities Offsetting Derivative Liabilities [Abstract] Total current-period year-to-date gross write-offs Total current-year gross charge-offs Charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Held by consolidated trusts Variable Interest Entity, Primary Beneficiary [Member] Minimum Capital Requirement [Member] Minimum Capital Requirement [Member] Minimum Capital Requirement Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Discounted Cash Flows Valuation Technique, Discounted Cash Flow [Member] Statement [Table] Statement [Table] Reconciling items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] One year before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Table - Held-for-Investment Loans on Non-accrual Financing Receivable, Nonaccrual [Table Text Block] FV - NI FairValueThroughNetIncome [Member] Represents financial instruments measured at fair value through net income. Single-family UPB Single-family Unpaid Principal Balance [Member] Unpaid Principal Balance of the Single-family Mortgage Portfolio. Mortgage loans held-for-sale Loan, Held-for-Sale, Fair Value Disclosure Loss Contingency, Damages Sought, Value Loss Contingency, Damages Sought, Value Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]