Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum [Member] Maximum [Member] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event [Member] Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Financial Services [Member] Financial Services [Member] Financial Services Member. Common stock, $.01 par value, 1,000,000,000 shares authorized, 404,879,728 shares issued and 284,940,888 shares outstanding at March 31, 2026 and 404,031,443 shares issued and 294,475,153 shares outstanding at September 30, 2025 Common Stock, Value, Issued Cash paid for shares withheld for taxes Payment, Tax Withholding, Share-Based Payment Arrangement Reserves for legal claims, beginning of period Reserves for legal claims, end of period Reserves for legal claims Loss Contingency Accrual Common Stock Available for Issuance, Value Remaining Common Stock Available for Issuance, Value Remaining Common Stock Available for Issuance, Value Remaining Restatement Determination Date Restatement Determination Date Employee compensation and related liabilities Employee-related Liabilities Impairment charges Inventory Write-down Derivative, by Nature [Axis] Derivative Instrument [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Amendment Flag Amendment Flag Inventory [Axis] Inventory [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Loss Contingencies [Table] Loss Contingencies [Table] Payments for Origination of Mortgage Loans Held-for-sale Payment for Origination, Loan, Mortgage, Held-for-Sale Broker deposits related to hedging instruments Other Payable to Broker-Dealer and Clearing Organization Deferred income taxes Increase (Decrease) in Deferred Income Taxes Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Exchange [Domain] Exchange [Domain] Derivative, Notional Amount Derivative, Notional Amount Weighted average number of common shares Denominator for basic earnings per share — weighted average shares Weighted Average Number of Shares Outstanding, Basic Capitalized Interest [Line Items] Capitalized Interest [Line Items] [Line Items] for Capitalized Interest [Table] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of homebuilding reporting segments Number of Reportable Segments Movement In Standard Product Warranty Accrual [Line Items] Movement In Standard Product Warranty Accrual [Line Items] Movement in standard product warranty accrual. Home sales Revenue from Contract with Customer, Including Assessed Tax Entity Address, City or Town Entity Address, City or Town RSUs granted in the period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual [Domain] Title and Position [Domain] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Increase in reserves Loss Contingency Accrual, Period Increase (Decrease) Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Interest Rate at Period End Credit Facility Maturing December 18, 2029 Credit Facility Maturing December 18, 2029 [Member] Credit Facility Maturing December 18, 2029 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Types of Deposits [Axis] Types of Deposits [Axis] Types Of Deposits Proceeds from Sale of Mortgage Loans Held-for-sale Proceeds from Sale, Loan, Mortgage, Held-for-Sale Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Margin deposits related to hedging instruments Margin Deposit Assets Treasury stock, 119,938,840 shares and 109,556,290 shares at March 31, 2026 and September 30, 2025, respectively, at cost Treasury Stock, Value Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Letters of credit, sublimit borrowing capacity, as a percentage Letter of Credit, Maximum Borrowing Capacity Maximum borrowing capacity of letter of credit. Land [Member] Land [Member] Schedule of segment reporting information, by segment Segment Reporting [Table Text Block] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Pledged reimbursements asset Bond Reimbursement Receivable Bond Reimbursement Receivable Deposits [Line Items] Deposits [Line Items] Deposits. Use of Estimates Use of Estimates, Policy [Policy Text Block] Unsecured Debt Unsecured Debt [Member] Accrued expenses and other liabilities Schedule of Accrued Liabilities [Table Text Block] Document Period End Date Document Period End Date At-the-market Equity Offering Program, Common Stock Issued At-the-market Equity Offering Program, Common Stock Issued At-the-market Equity Offering Program, Common Stock Issued 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 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] STOCKHOLDERS' EQUITY Equity [Text Block] Security Exchange Name Security Exchange Name Change of ownership interest in Forestar Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests Equity Securities Registered, Value Equity Securities Registered, Value The dollar amount of equity securities registered under the entity's registration statement. Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Southwest [Member] Southwest [Member] Southwest. Carrying Value of Communities Impaired Carrying Value of Communities Impaired Carrying Value of Communities Impaired Changes in warranty liability Schedule of Product Warranty Liability [Table Text Block] Number of housing construction markets Number Of Housing Construction Markets The number of markets the entity operates in as of the balance sheet date. EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Standard Product Warranty Accrual, Decrease for Payments Standard Product Warranty Accrual, Decrease for Payments Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Expenditures for property and equipment Payments to Acquire Property, Plant, and Equipment 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] Interest rate lock commitments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Rental properties Inventory, Operative Builders, Other Award Date [Axis] Award Date [Axis] Noncontrolling Interest, Ownership Percentage by Parent Subsidiary, Ownership Percentage, Parent Credit Facility [Domain] Credit Facility [Domain] OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Adjusted weighted average number of common shares Denominator for diluted earnings per share — adjusted weighted average shares Weighted Average Number of Shares Outstanding, Diluted Cash dividends paid per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Surety bonds Special Assessment Bond, Noncurrent Capitalized Interest [Table] Capitalized Interest [Table] Capitalized Interest [Table] Entities [Table] Entities [Table] Percentage of total units granted that vest in the period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Award Date [Domain] Award Date [Domain] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Commitments to Extend Credit [Member] Commitments to Extend Credit Commitments to Extend Credit [Member] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Prepaid assets Prepaid Expense Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Award Timing Predetermined Award Timing Predetermined [Flag] At-the-market Equity Offering Program, Common Stock Available for Issuance At-the-market Equity Offering Program, Common Stock Available for Issuance At-the-market Equity Offering Program, Common Stock Available for Issuance Treasury Stock, Common Treasury Stock, Common [Member] Compensation Related Costs, General Compensation Related Costs, General [Text Block] Letters of Credit Outstanding, Amount Outstanding letters of credit Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Other Other Assets, Miscellaneous Effective tax rate (percent) Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Employee stock awards (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Credit Facility Maturing March 27, 2029 Credit Facility Maturing March 27, 2029 [Member] Credit Facility Maturing March 27, 2029 Inventory, Current [Table] Inventory, Current [Table] All Executive Categories All Executive Categories [Member] Number of housing construction states Number of States in which Entity Operates Repurchases of common stock Stock Repurchased and Retired During Period, Value Interest rate lock commitments [Member] Interest Rate Lock Commitments [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other Assets and Accrued Expenses and Other Liabilities [Abstract] Other Assets and Accrued Expenses and Other Liabilities [Abstract] Other Assets And Accrued Expenses And Other Liabilities. Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Commitments and contingencies. Business Acquisition, Number of Controlled Lots Acquired through Land Purchase Contracts Business Acquisition, Number of Controlled Lots Acquired through Land Purchase Contracts Business Acquisition, Number of Controlled Lots Acquired through Land Purchase Contracts Lease right of use assets Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Numerator and denominator used to compute basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] SEGMENT INFORMATION Segment Reporting [Text Block] Minimum [Member] Minimum [Member] Revolving credit facility Borrowings outstanding on revolving credit facility Long-Term Line of Credit Cash dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Mortgage loans held for sale, outstanding principal amount Loan, Held-for-Sale or Securitization or Asset-Backed Financing Arrangement, Principal Outstanding Deposits [Table] Deposits [Table] Deposits. Standard Product Warranty Accrual Warranty liability Standard Product Warranty Accrual Rental Rental [Member] Rental LIABILITIES Liabilities [Abstract] Liabilities [Abstract] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Restricted cash Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Total 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] Repayment of notes payable Repayments of Notes Payable Retirement Eligible Retirement Eligible [Member] Retirement Eligible Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Pledged reimbursements liability Bond Reimbursement, Nonrecourse Liability Bond Reimbursement, Nonrecourse Liability Common Stock, Shares Authorized Common Stock, Shares Authorized Loss on Contract Termination Loss on Contract Termination Exercise Price Award Exercise Price INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Stock Repurchase Program, Authorized Amount Share Repurchase Program, Authorized, Amount Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report 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] Loans Sold to FNMA, FHLMC or securities backed by GNMA [Member] Loans Sold to FNMA, FHLMC or securities backed by GNMA [Member] Loans Sold to FNMA, FHLMC or securities backed by GNMA 1.3% Senior Notes due 2026 [Member] 1.3% Senior Notes due 2026 [Member] 1.3% Senior Notes due 2026 NOTES PAYABLE Debt Disclosure [Text Block] Accrued interest Interest Payable Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Types Of Deposits [Domain] Types Of Deposits [Domain] Types Of Deposits Interest incurred Interest Costs Incurred Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Option Contracts Subject to Specific Performance Clauses [Member] Performance Guarantee [Member] Mortgage loans held for sale Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Adoption Date Trading Arrangement Adoption Date Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Cash dividends declared Dividends, Common Stock, Cash Stockholders’ equity Equity, Attributable to Parent Mortgage servicing rights Servicing Asset Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Real Estate [Domain] Real Estate [Domain] ASSETS Assets [Abstract] Assets [Abstract] 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] Lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] SK Builders SK Builders [Member] SK Builders Net other financing activities Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance Shares [Member] Performance Shares [Member] South Central [Member] South Central [Member] South central. East [Member] East [Member] East. Selling, general and administrative expense Selling, General and Administrative Expense Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] October Two Thousand Twenty Five Grant October Two Thousand Twenty Five Grant [Member] October Two Thousand Twenty Five Grant COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] 5.5% Senior Notes due 2035 [Member] 5.5% Senior Notes due 2035 [Member] 5.5% Senior Notes due 2035 Entity Central Index Key Entity Central Index Key Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate, Non-Segment [Member] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Warehouse Agreement Borrowings [Member] Warehouse Agreement Borrowings Warehouse Agreement Borrowings [Member] Business Combination [Axis] Business Combination [Axis] 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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Credit Facility Maturing December 18, 2029 Credit Facility Maturing March 27, 2031 [Member] Credit Facility Maturing March 27, 2031 Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Construction Defect Portion of Loss Contingency Accrual Construction Defect Portion of Loss Contingency Accrual The portion of the total reserve for legal claims that relates to the entity's construction defect matters, expressed as a percentage. Deferred tax asset, net Deferred tax asset, net Deferred Income Tax Assets, Net Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Contract assets - insurance agency commissions Contract Asset Insurance Renewals Asset recorded for estimated future revenue from insurance renewals. Restricted Stock [Member] Restricted Stock [Member] First Quarter Two Thousand Twenty Six time-based RSU Grants First Quarter Two Thousand Twenty Six time-based RSU Grants [Member] First Quarter Two Thousand Twenty Six time-based RSU Grants All Individuals All Individuals [Member] Changes in legal claims reserves Schedule of Loss Contingencies by Contingency [Table Text Block] Time-Based RSU Time-Based RSU [Member] Time-Based RSU Deposit Liabilities, Collateral Issued, Financial Instruments Deposit Liabilities, Collateral Issued, Financial Instruments Name Forgone Recovery, Individual Name Interest Costs Incurred [Abstract] Interest Costs Incurred [Abstract] Rollforward of reserves for legal claims Loss Contingency Accrual [Roll Forward] Letter of Credit, Maximum Borrowing Capacity (in dollars) Letter of Credit, Maximum Borrowing Capacity (in dollars) Letter of Credit, Maximum Borrowing Capacity (in dollars) Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Increase in rental properties Increase (Decrease) in Rental Properties Increase (Decrease) in Rental Properties Preferred Stock, Shares Issued Preferred Stock, Shares Issued HomeBuildingOps HomeBuildingOps [Member] HomeBuildingOps Standard Product Warranty Accrual, Increase for Warranties Issued Standard Product Warranty Accrual, Increase for Warranties Issued Increase in other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] NEW YORK STOCK EXCHANGE, INC. [Member] NEW YORK STOCK EXCHANGE, INC. [Member] Accrued property taxes Accrual for Taxes Other than Income Taxes, Current Other Customer [Member] Other Customer [Member] Measurement Basis [Axis] Measurement Basis [Axis] Stock Repurchased and Retired During Period, Shares Stock Repurchased and Retired During Period, Shares Goodwill Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Fair value of equity awards on the date of grant (in US$ per unit) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings [Member] Retained Earnings [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted net income per common share attributable to D.R. Horton, Inc. (in dollars per share) Diluted net income per common share attributable to Parent (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status 1.4% Senior Notes due 2027 [Member] 1.4% Senior Notes due 2027 [Member] 1.4% Senior Notes due 2027 Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Inventory [Domain] Inventory [Domain] Ownership [Domain] Ownership [Domain] 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] FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Capitalized interest, beginning of period Capitalized interest, end of period Real Estate Inventory, Capitalized Interest Costs Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Revenues Segment Reporting, Revenue [Abstract] Southeast [Member] Southeast [Member] Southeast. Financial Instruments [Domain] Financial Instruments [Domain] Participating Mortgage Loans, Mortgage Obligations, Amount Participating Mortgage Loans, Mortgage Obligations, Amount Northwest Northwest [Member] Northwest INVENTORY Inventory Disclosure [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Increase (Decrease) in Prepaid Expenses, Other Increase (Decrease) in Prepaid Expenses, Other 5.0% Senior Notes due 2034 [Member] 5.0% Senior Notes due 2034 [Member] 5.0% Senior Notes due 2034 Proceeds from stock associated with certain employee benefit plans Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Residential land and lots — developed and under development Inventory, Real Estate, Land and Land Development Costs CAPITALIZED INTEREST Capitalized Interest [Text Block] Capitalized Interest [Text Block] Other investing activities Payment for (Proceeds from) Other Investing Activity Other Other Accrued Liabilities Segment Reporting [Table] Segment Reporting [Table] Stock issued under employee incentive plans Stock Issued Title of Individual [Axis] Title and Position [Axis] Cash [Member] Cash [Member] Rollforward of capitalized interest Real Estate Inventory, Capitalized Interest Costs [Roll Forward] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Forestar Group [Member] Forestar Group [Member] Forestar Group [Member] Authorized Repurchase Of Debt Securities Authorized Repurchase Of Debt Securities The total repurchase amount authorized by an entity's Board of Directors under a debt repurchase plan. Current Fiscal Year End Date Current Fiscal Year End Date Inventory related accruals Construction Payable Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Inventory and land option charges Production Related Impairments or Charges Increase (Decrease) in Earnest Money Deposits Outstanding Increase (Decrease) in Earnest Money Deposits Outstanding Notes payable, Fair value Notes Payable, Fair Value Disclosure 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] Divedends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Stock issued under employee incentive plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Eliminations and Other Eliminations and Other [Member] Eliminations and Other Common Stock, Shares, Issued Common Stock, Shares, Issued Measure: Measure [Axis] Entity Information [Line Items] Entity Information [Line Items] Treasury Stock, Common, Shares Treasury Stock, Common, Shares Equity Components [Axis] Equity Components [Axis] Product and Service [Domain] Product and Service [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Valuation allowance for deferred income taxes Deferred Tax Assets, Valuation Allowance Entity Interactive Data Current Entity Interactive Data Current Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred tax liability, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Business Acquisition, Number of Lots Acquired Business Acquisition, Number of Lots Acquired Business Acquisition, Number of Lots Acquired Termination Date Trading Arrangement Termination Date Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type Payments related to business acquisitions, net of cash acquired Payments related to business acquisitions Payments to Acquire Businesses, Net of Cash Acquired Fair Value as of Grant Date Award Grant Date Fair Value Significant Accounting Policies Significant Accounting Policies [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Mortgage hedging instruments and commitments Other Derivatives Not Designated as Hedging Instruments Liabilities at Fair Value Stock Repurchase Program, Remaining Authorized Repurchase Amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Insurance receivables Insurance Settlements Receivable Commitments and contingencies (Note K) Commitments and Contingencies Line of Credit Facility, Expiration Date Line of Credit Facility, Expiration Date (Increase) decrease in construction in progress and finished homes Increase (Decrease) in Finished Goods and Work in Process Inventories Revenues Total revenues Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Mortgage Loans Mortgage Loans [Member] Mortgage Loans Other assets Other Assets [Abstract] Increase (decrease) in accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Business Combination Business Combination [Policy Text Block] Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Gain (Loss) on Sales of Loans, Net Gain (Loss) on Sales of Loans, Net NYSE TEXAS, INC. NYSE TEXAS, INC. [Member] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Land held for sale Inventory, Land, Held-for-Sale Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Business Acquisition, Number of Homes Acquired Business Acquisition, Number of Homes Acquired Business Acquisition, Number of Homes Acquired Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Total inventory Total inventories Inventory, Real Estate Geographical [Axis] Geographical [Axis] Repurchases of common stock Payments for Repurchase of Equity Customer deposits Contract with Customer, Liability Other assets Other assets Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Notes payable Notes payable Notes Payable Total cash, cash equivalents and restricted cash Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation 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] North North [Member] North OTHER ASSETS, ACCRUED EXPENSES AND OTHER LIABILITIES Other Assets And Accrued Expenses And Other Liabilities [Text Block] Schedules providing a breakdown of the balances of other assets and accrued expenses/other liabilities at the end of the reporting period. Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Share-Based Payment Arrangement, Noncash Expense Credit Facility Maturing October 28, 2026 Credit Facility Maturing October 28, 2026 [Member] Credit Facility Maturing October 28, 2026 Summary of notes payable at principal amounts, net of unamortized discounts Schedule of Debt [Table Text Block] Customer [Domain] Customer [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic net income per common share attributable to D.R. Horton, Inc. (in dollars per share) Basic net income per common share attributable to Parent (in dollars per share) Earnings Per Share, Basic Payments for Repurchase of Common Stock Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] MORTGAGE LOANS SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Text Block] Cost of sales Cost of sales Cost of Revenue Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Earnest money deposits Earnest Money Deposits Business Acquisition, Backlog Acquired Business Acquisition, Backlog Acquired Business Acquisition, Backlog Acquired Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Movement In Standard Product Warranty Accrual [Table] Movement In Standard Product Warranty Accrual [Table] Movement in standard product warranty accrual. Construction in progress and finished homes Inventory, Homes under Construction 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] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock [Member] Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Reporting segment results Segment Reporting, Operating Income (Loss) [Abstract] Litigation Settlement, Expense Litigation Settlement, Fee Expense Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Debt Repurchase Authorization Remaining Debt Repurchase Authorization Remaining The remaining repurchase amount authorized by an entity's Board of Directors under a debt repurchase plan. Concentration Risk, Percentage Concentration Risk, Percentage Derivative, Name [Domain] Derivative Contract [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Inventories: Inventories: Inventory, Real Estate [Abstract] Total liabilities and equity Liabilities and Equity (Increase) decrease in mortgage loans held for sale Increase (Decrease) in Loan, Mortgage, Held-for-Sale Employee Stock Option Share-Based Payment Arrangement, Option [Member] 4.85% Senior Notes due 2030 4.85% Senior Notes due 2030 [Member] 4.85% Senior Notes due 2030 Noncontrolling interests Equity, Attributable to Noncontrolling Interest Notes Payable, Other Payables [Member] Notes Payable, Other Payables [Member] Segments [Axis] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Other (income) expense Other Nonoperating Income (Expense) Earnest money and refundable deposits Deposits Assets Name Awards Close in Time to MNPI Disclosures, Individual Name EQUITY Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] 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] 6.5% Senior Notes due 2033 [Member] 6.5% Senior Notes due 2033 [Member] 6.5% Senior Notes due 2033 Credit Facility Maturing October 28, 2027 Credit Facility Maturing October 28, 2027 [Member] Credit Facility Maturing October 28, 2027 5.0% Senior Notes due 2028 [Member] 5.0% Senior Notes due 2028 [Member] Senior Note Member Forty Three Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Preferred stock, $.10 par value, 30,000,000 shares authorized, no shares issued Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Inventory [Line Items] Inventory [Line Items] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Assets Sold under Agreements to Repurchase, Interest Rate Assets Sold under Agreements to Repurchase, Interest Rate Accounts payable Accounts Payable Line of Credit Facility, Increase (Decrease), Net Line of Credit Facility, Increase (Decrease), Net Land held for development Inventory, Land Held for Development and Sale Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Mortgage hedging instruments and commitments Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Accrued expenses and other liabilities Accrued expenses and other liabilities Accrued Liabilities Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Compensation Related Costs [Abstract] Compensation Related Costs [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Rollforward of capitalized interest Capitalized Interest Costs [Table Text Block] Information regarding the capitalization of homebuilding interest costs. RSU Grant Recipients RSU Grant Recipients RSU Grant Recipients Depreciation and amortization Depreciation, Depletion and Amortization Interest charged to cost of sales Real Estate Inventory, Capitalized Interest Costs, Cost of Sales Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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] Non-PEO NEO Non-PEO NEO [Member] Decrease (increase) in residential land and lots – developed, under development, held for development and held for sale Increase (Decrease) in Inventory for Long-Term Contracts or Programs Entity Address, Address Line One Entity Address, Address Line One Senior Notes Senior Notes [Member] Income tax expense Income tax expense Income Tax Expense (Benefit) Payments Loss Contingency Accrual, Payments Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Customer Concentration Risk Customer Concentration Risk [Member] Cost of Product and Service Sold Cost of Product and Service Sold Remaining purchase price of land under option contracts Purchase Obligation Award Timing Method Award Timing Method [Text Block] Loan Origination Commitments [Member] Loan Origination Commitments [Member] Net decrease 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 Other receivables Accounts and Financing Receivable, after Allowance for Credit Loss Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Water rights and other water-related assets Other Intangible Assets, Net Net income attributable to D.R. Horton, Inc. Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized Debt Issuance Expense Unamortized Debt Issuance Expense Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Interest rate lock commitments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Proceeds from notes payable Proceeds from Notes Payable Other assets Schedule of Other Assets [Table Text Block] Federal and state income tax liabilities Accrued Income Taxes Borrowings (repayment) on mortgage repurchase facilities, net Proceeds from (Repayments of) Lines of Credit SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES: Other Noncash Investing and Financing Items [Abstract] Accrued expenses and other liabilities Accrued Liabilities [Abstract] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other Liabilities