Proceeds from dealership divestitures Proceeds from Divestiture of Businesses Expected future recognition of unrecognized compensation expense related to nonvested share-based awards, 2022 Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Next Twelve Months Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Next Twelve Months Other accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Investments Investment, Policy [Policy Text Block] Debt Securities, Available-for-sale Debt Securities, Available-for-Sale [Table Text Block] Assets held for sale Assets held for saleBusiness Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Assets Held For Sale Assets held for saleBusiness Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Assets Held For Sale Components of Inventory [Axis] Components of Inventory [Axis] Components of Inventory Award Timing Predetermined Award Timing Predetermined [Flag] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Unrealized gains (losses) on available-for-sale debt securities, tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Reduction to new vehicle cost of sales by automobile manufacturer incentives Reduction to New Vehicle Cost of Sales by Automobile Manufacturer Incentives Reduction to New Vehicle Cost of Sales by Automobile Manufacturer Incentives Tabular List, Table Tabular List [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Current maturities of operating leases Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Franchises acquired Business Combination, Franchises Acquired Business Combination, Franchises Acquired Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Total debt securities Debt Securities [Member] Goodwill [Line Items] Goodwill [Line Items] Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other Other Assets, Miscellaneous, Current REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Intangible Asset, Indefinite-Lived [Table] Intangible Asset, Indefinite-Lived [Table] FINANCIAL INSTRUMENTS AND FAIR VALUE Derivatives and Fair Value [Text Block] Total Current Income Tax Expense Current Income Tax Expense (Benefit) Total Assets Disposal Group, Including Discontinued Operation, Assets Components of Inventory [Domain] Component of Inventory [Domain] Component of Inventory [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Other receivables Other Trade Accounts Receivable [Member] Other Trade Accounts Receivable [Member] Other current assets Increase (Decrease) in Other Operating Assets Consolidation Consolidation, Policy [Policy Text Block] Share-based compensation Share-Based Payment Arrangement, Noncash Expense Percent of principal amount Redemption Amount Pro Rata Basis, Percent Redemption Amount Pro Rata Basis, Percent Employee Stock Option Share-Based Payment Arrangement, Option [Member] Prepaid taxes Prepaid Taxes Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Floor plan interest expense Floor Plan interest Expense Interest expense incurred on vehicle floorplan payable trade and non-trade outstanding during the period. Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Asset impairments Asset impairments Asset Impairment Charges Total shareholders' equity Beginning balance Ending balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Net income Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] TCA TCA [Member] TCA American Honda Motor Co., Inc. (Honda and Acura) American Honda Motor Co., Inc. (Honda and Acura) [Member] American Honda Motor Co., Inc. (Honda and Acura) [Member] Schedule of Estimated Useful Lives Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized INTANGIBLE FRANCHISE RIGHTS Indefinite-Lived Franchise Rights Advertising credits and volume discounts Advertising Credits and Volume Discounts Advertising Credits and Volume Discounts Recurring Fair Value, Recurring [Member] 2018 Wells Fargo Master Loan Facility 2018 Wells Fargo Master Loan Facility [Member] 2018 Wells Fargo Master Loan Facility [Member] Business and Credit Concentration Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Divestitures Indefinite-Lived Intangible Assets, Written off Related to Sale of Business Unit LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Unrealized gains (losses) on available-for-sale debt securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment and Tax Cover [Abstract] Cover [Abstract] Maximum Maximum [Member] Fair Value Total Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Due after 10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Restricted Stock Awards Restricted Stock [Member] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Restricted Stock Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Initial accounting incomplete, adjustment, intangibles Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] INCOME BEFORE INCOME TAXES INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Amount of surety bond line maintained Amount of Surety Bond Line Maintained Amount of Surety Bond Line maintained in the ordinary course of business. Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from issuance of debt Proceeds from Issuance of Debt Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Self-insurance Programs Self Insurance Reserve [Policy Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Other comprehensive income (loss) - net of tax: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Employer matching contribution, employment requirement period for matching eligibility, minimum Defined Contribution Plan, Employer Matching Contribution, Employment Requirement Period for Matching Eligibility, Minimum Defined Contribution Plan, Employer Matching Contribution, Employment Requirement Period for Matching Eligibility, Minimum Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Letter of Credit Letter of Credit [Member] Current maturities of operating leases Liabilities, Current, Operating Operating Lease, Liability, Current Finance lease cost (Interest) Finance Lease, Interest Expense Document Fiscal Period Focus Document Fiscal Period Focus Acquisitions - measurement-period adjustments Indefinite-Lived Intangible Assets, Purchase Accounting Adjustments Number of dealership locations, sold (in dealership locations) Number Of Dealership Locations, Sold Number Of Dealership Locations, Sold Herb Chambers Dealerships Herb Chambers Dealerships [Member] Herb Chambers Dealerships Award Timing Method Award Timing Method [Text Block] Furniture and fixtures Furniture and Fixtures [Member] Award Type [Axis] Award Type [Axis] DEFERRED REVENUE Contract with Customer, Liability, Noncurrent Bank of America Bank of America, N.A. [Member] Bank of America, N.A. [Member] Schedule of Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Share-based Compensation Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Acquisitions Business Combination [Policy Text Block] Mortgage Agreement [Domain] Mortgage Agreement [Domain] [Domain] for Mortgage Agreement [Axis] Lease Term and Discount Rate, Lessee Lease Term and Discount Rate, Lessee [Table Text Block] Lease Term and Discount Rate, Lessee [Table Text Block] Schedule of Goodwill and Intangibles Schedule of Intangible Assets and Goodwill [Table Text Block] ASSETS HELD FOR SALE Disclosure of Long Lived Assets Held-for-sale During Period [Text Block] Disclosure of Long Lived Assets Held-for-sale During Period [Text Block] Issuance of common stock in connection with share-based payment arrangements (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Unearned premiums Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Deposits Deposits Assets, Current Entity Address, City or Town Entity Address, City or Town Weighted Average Discount Rate - Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Aggregate purchase price Business Combination, Consideration Transferred Floor plan notes payable—used non-trade Floor Plan Notes Payable Non Trade, Used, Gross Floor Plan Notes Payable Non Trade, Used, Gross Operating lease right-of-use assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease right-of-use assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease right-of-use assets Entity Emerging Growth Company Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three Weighted Average Lease Term - Finance Lease Finance Lease, Weighted Average Remaining Lease Term Base Rate Component, Federal Funds Base Rate Component, Federal Funds [Member] Federal Funds [Member] Repayments of revolving credit facility Repayments of Lines of Credit 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] Less: debt issuance costs Unamortized debt issuance expense Debt Issuance Costs, Net Accrued insurance Accrued Insurance, Current Revolving Credit Facility1 Revolving Credit Facility1 [Member] Revolving Credit Facility1 [Member] 4.625% Senior Notes due 2029 Four Point Six Two Five Percent Senior Notes due 2029 [Member] Four Point Six Two Five Percent Senior Notes due 2029 Beginning balance Ending balance Indefinite-Lived Intangible Assets (Excluding Goodwill) Less: Amount of lease payments representing interest Finance Lease, Liability, Undiscounted Excess Amount Performance share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Mortgage Agreement [Axis] Mortgage Agreement [Axis] Mortgage Agreement [Axis] ACCOUNTS RECEIVABLE Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Reclassified from assets held for sale Impairment of Intangible Assets, Reclassified from assets held for sale Impairment of Intangible Assets, Reclassified from assets held for sale Jim Koons Dealerships Jim Koons Dealerships [Member] Jim Koons Dealerships Taxes payable Taxes Payable, Current, Excluding Income Taxes Payable Taxes Payable, Current, Excluding Income Taxes Payable 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] Ford Franchise Ford Franchise [Member] Ford Franchise Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Floor plan notes payable offset account Floor Plan Notes Payable Trade, Offsets Floor Plan Notes Payable Trade, Offsets Income tax expense Total Income Tax Expense Income Tax Expense (Benefit) Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Change in fair value of cash flow swaps, net of reclassification adjustment tax charge (benefit) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Total lease liabilities Leases, Liability Leases, Liability Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Change in fair value of cash flow swaps, net of reclassification adjustment Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Employer matching contributions Defined Contribution Plan, Employer Discretionary Contribution Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Schedule of Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Goodwill acquired Acquisitions Goodwill, Acquired During Period Income tax benefit associated with cash flow swaps Results Recognized in AOCI (Effective Portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Less—Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization ACQUISITIONS AND DIVESTITURES Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisitions Payments to Acquire Businesses, Net of Cash Acquired Federal Income Tax Paid, Federal, after Refund Received Buildings and improvements Buildings and leasehold improvements Building and Building Improvements [Member] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Redemption price, percentage Debt Instrument, Redemption Price, Percentage Customer we owe liabilities Accrued Liabilities, Current Intangible asset amortization Deferred Tax Liabilities, Intangible asset amortization Deferred Tax Liabilities, Intangible asset amortization Deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Outsanding, beginning balance (in shares) Outsanding, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Capital expenditures—excluding real estate Payments to Acquire Property, Plant, and Equipment, Excluding Real Estate Payments to Acquire Property, Plant, and Equipment, Excluding Real Estate Number of assets held-for-sale Number Of Assets Held-For-Sale Number Of Assets Held-For-Sale Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Franchise rights Franchise Rights [Member] Debt instrument, term Debt Instrument, Term 4.75% Senior Notes due 2030 Four Point Seven Five Percent Senior Notes due 2030 [Member] Four Point Seven Five Percent Senior Notes due 2030 [Member] Proceeds from the sale of debt securities—available-for-sale Proceeds from Sale of Debt Securities, Available-for-Sale Estimated useful life (in years) Property, Plant and Equipment, Useful Life Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Other current assets Business Combination, Recognized Asset Acquired, Other Asset, Current Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Used Floor Plan Facility Used Floor Plan Facility [Member] Used Floor Plan Facility 2028 Finance Lease, Liability, to be Paid, Year Four Wells Fargo Wells Fargo Bank, National Association [Member] Wells Fargo Bank, National Association [Member] OTHER LONG-TERM LIABILITIES Other Liabilities Disclosure [Text Block] Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Standby Letters of Credit Standby Letters of Credit [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments SHARE-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS Compensation and Employee Benefit Plans [Text Block] Loaner Vehicle Notes Payable - OEMs Loaner Vehicle Notes Payable - OEMs [Member] Loaner Vehicle Notes Payable - OEMs Advertising Advertising Cost [Policy Text Block] Schedule of Aggregate Maturities Contractual Obligation, Fiscal Year Maturity [Table Text Block] Entity Address, State or Province Entity Address, State or Province Long-term lease obligation Operating Lease, Liability, Noncurrent1 Operating Lease, Liability, Noncurrent1 2018 BofA Real Estate Facility 2018 BofA Real Estate Facility [Member] 2018 BofA Real Estate Facility [Member] Total current liabilities Liabilities, Current SOFR Plus Basis Spread SOFR Plus Basis Spread [Member] SOFR Plus Basis Spread Components of Inventory [Axis] Inventory [Axis] Individual: Individual [Axis] Gross property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Document Annual Report Document Annual Report Maximum annual contribution per employee Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of long-term debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Equity securities, FV-NI, realized gain Equity Securities, FV-NI, Realized Gain Schedule of Revenues by Major Brand [Table] Schedule of Revenues by Major Brand [Table] Schedule of Revenues by Major Brand [Table] 2021 Real Estate Facility 2021 Real Estate Facility 2021 Real Estate Facility [Member] 2021 Real Estate Facility SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Deferred Revenue Location [Axis] Deferred Revenue Location [Axis] Deferred Revenue Location Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Other selling, general and administrative expense Other Selling, General and Administrative Expense Lexus Franchise Lexus Franchise [Member] Lexus Franchise Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current maturities of long-term debt Less—current portion, net of debt issuance costs Long-Term Debt and Lease Obligation, Current Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] 2026 Finance Lease, Liability, to be Paid, Year Two Schedule of Floor Plan Notes Payable - Trade Floor Plan Notes Payable - Trade [Table Text Block] Floor Plan Notes Payable - Trade [Table Text Block] OTHER LONG-TERM ASSETS Other Assets, Noncurrent Accrued interest Interest Payable, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name Additional debt issuance costs Additional Debt Issuance Costs, Net Additional Debt Issuance Costs, Net Revenues Revenues 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] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of quarterly principal payments Line of Credit Facility, Number of Quarterly Principal Payments Line of Credit Facility, Number of Quarterly Principal Payments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Share-Based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Deferred revenue—current Contract with Customer, Liability, Current Schedule of Derivative Instruments Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Income tax provision at the statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Asset, Held-for-Sale [Table] Maximum redemption as percent from aggregate principal amount Maximum Redemption As Percent From Aggregate Principal Amount Maximum Redemption As Percent From Aggregate Principal Amount Notional principal amount of derivative liability, at maturity Derivative Liability, Notional Amount, at Maturity Derivative Liability, Notional Amount, at Maturity Gain on divestitures, net Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Vesting [Domain] Vesting [Domain] Reclassified to assets held for sale Impairment of Intangible Assets, Reclassified to assets held for sale Impairment of Intangible Assets, Reclassified to assets held for sale Deferred income tax assets: Deferred Tax Assets, Net [Abstract] F&I F&I [Member] F&I 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] Operating lease liabilities Operating Lease Liability, Operating Activities Operating Lease Liability, Operating Activities Toyota Motor Sales, U.S.A., Inc. (Toyota and Lexus) Toyota Motor Sales, U.S.A., Inc. (Toyota and Lexus) [Member] Toyota Motor Sales, U.S.A., Inc. (Toyota and Lexus) [Member] Number of states (in states) Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Less—Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Debt Issuance Costs Deferred Charges, Policy [Policy Text Block] Investments [Domain] Investments [Domain] Repurchase of common stock associated with net share settlements of employee share-based awards (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Dealerships Dealerships [Member] Dealerships Schedule of Components of Inventory [Line Items] Schedule of Components of Inventory [Line Items] Schedule of Components of Inventory [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Other Liabilities Other Liabilities [Member] Fair Value as of Grant Date Award Grant Date Fair Value Costs incurred to obtain a contract with a customer Contract with Customer, Costs to Obtain Contract Contract with Customer, Costs to Obtain Contract Expected future recognition of unrecognized compensation expense related to nonvested share-based awards, 2024 Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Year Three Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Year Three Held-for-sale Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Personnel costs Labor and Related Expense Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Manufacturer receivables Manufacturer Receivables [Member] Manufacturer Receivables [Member] Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Deferred Sales Commissions Deferred Sales Commissions [Member] Deferred Sales Commissions Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Total unrecognized share-based compensation expense related to nonvested awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Number of shares forfeited or repurchased (in shares) Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Amortization schedule Line of Credit Facility, Amortization Schedule Line of Credit Facility, Amortization Schedule Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Schedule of Accounts Payable and Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Investment Type [Axis] Investment Type [Axis] Income tax (expense) benefit associated with available-for-sale debt securities Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] INVESTMENTS Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Payments to acquire businesses, gross Payments to Acquire Businesses, Gross Shares that could be earned, range Share-based Compensation Arrangement by Share-based Payment Award, Percent of Target Number of Shares Earned Share-based Compensation Arrangement by Share-based Payment Award, Percent of Target Number of Shares Earned Non-PEO NEO Non-PEO NEO [Member] Amount of letters of credit outstanding Letters of Credit Outstanding, Amount New vehicle New vehicle [Member] New vehicle [Member] Notional principal amount of derivative liability Derivative Liability, Notional Amount Land Land [Member] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Assets: Disposal Group, Including Discontinued Operation, Assets [Abstract] Award Type [Domain] Award Type [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Equity Awards Adjustments Equity Awards Adjustments [Member] Advertising Advertising Expense Other adjustments, net Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Parts and services Parts and services [Member] Parts and services [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Mortgage Notes Payable Mortgage Notes Payable [Member] Mortgage Notes Payable Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] FLOOR PLAN NOTES PAYABLE—TRADE Floor Plan Notes Payable - Trade [Text Block] Floor Plan Notes Payable - Trade [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Due in 1-5 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Used Vehicle Used Vehicle [Member] Used Vehicle Total debt outstanding Long Term Debt and Lease Obligations, Current and Noncurrent Long Term Debt and Lease Obligations, Current and Noncurrent Type of Brand [Axis] Type of Brand [Axis] Type of Brand [Axis] Dealership Location Dealership Location [Member] Dealership Location REVENUE: Revenues [Abstract] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Due in 6-10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Components of Inventory [Domain] Inventory [Domain] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax LONG-TERM DEBT Long-term debt Long-Term Debt and Lease Obligation 2026 Long-Term Debt, Maturity, Year One Financial Instruments [Domain] Financial Instruments [Domain] Total deferred income tax liabilities Deferred Tax Liabilities, Gross Schedule of Derivative Instruments Effect on Accumulated Other Comprehensive Income Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] 2030 Long-Term Debt, Maturity, Year Five New Vehicle New Vehicle [Member] New vehicle [Member] Performance Share Units Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Liabilities: Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Inventories, net Total inventories Inventory, Net Minimum Minimum [Member] Goodwill, measurement period adjustment Goodwill, Measurement Period Adjustment Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Pro forma net income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Statements of Cash Flows Statement of Cash Flows, Policy [Policy Text Block] Statement of Cash Flows, Policy [Policy Text Block] DEBT Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Operating cash flows from operating leases Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Goodwill [Roll Forward] Goodwill [Roll Forward] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Assets Held for Sale and Liabilities Associated with Assets Held for Sale Assets Held for Sale and Liabilities Associated with Assets Held for Sale Policy [Policy Text Block] Assets Held for Sale and Liabilities Associated with Assets Held for Sale Policy [Policy Text Block] Captive mortgages Captive Mortgage [Member] Captive Mortgage [Member] Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Entity Small Business Entity Small Business Consolidated total leverage ratio Debt Instrument, Consolidated Total Leverage Ratio Debt Instrument, Consolidated Total Leverage Ratio Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Quarterly principal payments as percent of initial amount Line of Credit Facility, Quarterly Principal Payments as Percent of Initial Amount Line of Credit Facility, Quarterly Principal Payments as Percent of Initial Amount Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding State Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Due in 1-5 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Total minimum lease payments Finance Lease, Liability, to be Paid Underlying Securities Award Underlying Securities Amount Debt securities, available-for-sale, realized gain Debt Securities, Available-for-Sale, Realized Gain New Floor Plan Facility New Floor Plan Facility [Member] New Floor Plan Facility Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Loaner Vehicle Notes Payable - Bank of America Loaner Vehicle Notes Payable - Bank of America [Member] Loaner Vehicle Notes Payable - Bank of America INCOME TAXES Income Tax Disclosure [Text Block] Add: unamortized premium Unamortized premium Debt Instrument, Unamortized Premium Proceeds from revolving credit facility Proceeds from Lines of Credit Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Short-term lease cost Short-Term Lease, Cost Chevrolet Franchise Chevrolet Buick GMC Franchise [Member] Chevrolet Buick GMC Franchise Volvo Franchise Volvo Franchise [Member] Volvo Franchise Dealerships acquired Business Combination, Dealerships Acquired Business Combination, Dealerships Acquired Summary of Assets Held for Sale and Liabilities Associated with Assets Held for Sale Summary of Assets Held for Sale and Liabilities Associated with Assets Held for Sale [Table Text Block] Summary of Assets Held for Sale and Liabilities Associated with Assets Held for Sale [Table Text Block] Inventories Disposal Group, Including Discontinued Operation, Inventory Mortgage and other asset-backed securities Mortgage And Other Assets Backed Securities [Member] Mortgage And Other Assets Backed Securities Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Redemption amount pro rata basis Redemption Amount Pro Rata Basis Redemption Amount Pro Rata Basis Notes Payable Notes Payable Variable lease cost Variable Lease, Cost Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Operating lease right-of-use assets Deferred Tax Assets, Right of Use Assets Deferred Tax Assets, Right of Use Assets Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Amortization of deferred acquisition costs Business Acquisition, Deferred Acquisition Costs, Amortization Business Acquisition, Deferred Acquisition Costs, Amortization Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] CURRENT LIABILITIES: Liabilities, Current [Abstract] OTHER EXPENSES (INCOME): Other Expenses [Abstract] Floor plan notes payable—non-trade, net Total floor plan notes payable—non-trade, net Floor Plan Notes Payable Non Trade Amounts borrowed to finance the purchase of specific new and, to a lesser extent, used vehicle inventories with non-trade lenders (lenders that are not captive finance subsidiaries of the manufacturer). Level 1 Fair Value, Inputs, Level 1 [Member] Aggregate commitments Long-Term Line of Credit Other Assets [Abstract] Other Assets [Abstract] Payments for lender fees Payments for Lender Fees Payments for Lender Fees Vesting period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Net income (in dollars per share) Earnings Per Share, Diluted Deferred sales commissions Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost Depreciation Deferred Tax Liabilities, Depreciation Deferred Tax Liabilities, Depreciation Due in 6-10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Compensation Related Costs [Abstract] Compensation Related Costs [Abstract] Treasury stock (in shares) Beginning balance, treasury (in shares) Ending balance, treasury (in shares) Treasury Stock, Common, Shares Change in right-of-use asset Change in Operating Lease, Right of Use Asset Change in Operating Lease, Right of Use Asset State Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Sale Of Parts and Services Sale Of Parts and Services [Member] Sale Of Parts and Services Investments, Debt and Equity Securities [Abstract] Auditor Location Auditor Location GROSS PROFIT Gross Profit Schedule of Mortgage Notes Payable Schedule of Mortgage Notes Payable [Table Text Block] Schedule of Mortgage Notes Payable [Table Text Block] Retirement of common stock Stock Repurchased and Retired During Period, Value ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Less: Amount of lease payments representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Franchise rights Disposal Group, Including Discontinued Operation, Intangible Assets Proceeds from the sale of equity securities Proceeds from Sale of Equity Securities, FV-NI Income taxes paid Income taxes paid Income Taxes Paid, Net Chrysler Jeep Dodge Ram Franchise Chrysler Jeep Dodge Ram Franchise [Member] Chrysler Jeep Dodge Ram Franchise Long-term debt, gross Long-Term Debt, Gross Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Accrued compensation and benefits Employee-related Liabilities, Current PROPERTY AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Unrealized gain on changes in fair value of debt securities, net of $1.1 million tax expense OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization 2023 Senior Credit Facility 2023 Senior Credit Facility [Member] 2023 Senior Credit Facility Repayment schedule Line of Credit Facility, Repayment Schedule Line of Credit Facility, Repayment Schedule Intersegment Eliminations Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Audit Information [Abstract] Audit Information PROPERTY AND EQUIPMENT, net Property, Plant and Equipment, Net Long Lived Assets Held-for-sale [Line Items] Long-Lived Assets Held-for-Sale [Line Items] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Inventory, Policy [Policy Text Block] Contracts-in-transit, net Contracts In Transit Contracts-in-transit represent receivables from third-party finance companies for the portion of new and used vehicle purchase price financed by customers through sources arranged by us. Entity Current Reporting Status Entity Current Reporting Status Ratio of award to shares Share-Based Compensation Arrangement by Share-Based Payment Award, Ratio Of Award To Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Ratio Of Award To Shares Receivables [Abstract] Receivables [Abstract] Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Total right-of-use assets Leases, Right-of-Use Asset Leases, Right-of-Use Asset Due in 1 year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Income tax provision at the statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Financial Instrument [Axis] Financial Instrument [Axis] Balance Sheet: Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] 12 months or longer, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Repayments of debt Repayments of Debt State income tax expense, net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Aggregate Principal Outstanding SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Comprehensive Income (Loss): Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Floor plan borrowings—acquisitions Floor Plan Borrowings, Acquisitions Borrowings of floor plan notes payable to parties other than the manufacturer related to the acquisition of dealerships. Liabilities, Current, Finance Less: current obligations under leases (a) Finance Lease, Liability, Current Lower of cost or market inventory reserves Inventory Valuation Reserves Proceeds from borrowings Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Less than 12 months, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Reastated Credit Agreement Reastated Credit Agreement [Member] Reastated Credit Agreement [Member] Revenues by major brand, disclosure percentage threshold Entity-Wide Revenues, Major Brands, Disclosure Percentage Threshold Entity-Wide Revenues, Major Brands, Disclosure Percentage Threshold Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Number of shares still available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Used vehicle wholesale Used vehicle wholesale [Member] Used vehicle wholesale [Member] Accounts receivable, net Accounts receivable, net Receivables, Net, Current Unrealized Losses Total Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business Description and Accounting Policies [Text Block] Debt instrument, variable rate, minimum Debt Instrument, Variable Rate, Minimum Debt Instrument, Variable Rate, Minimum Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4.50% Senior Notes due 2028 Four Point Five Zero Percent Senior Notes due 2028 [Member] Four Point Five Zero Percent Senior Notes due 2028 [Member] WEIGHTED AVERAGE COMMON SHARES OUTSTANDING: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Accounts payable and accrued liabilities Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current 2027 Long-Term Debt, Maturity, Year Two Used vehicle Used vehicles Used Vehicles [Member] Used Vehicles LEASES Lessee, Operating Leases [Text Block] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] General Motors General Motors [Member] General Motors Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Assets And Liabilities, Lessee Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Transferred to receivables from contract assets recognized at the beginning of the period Contract with Customer, Asset, Reclassified to Receivable Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Operating Lease, Liability Held-for-Sale, Current Operating Lease, Liability Held-for-Sale, Current Operating Lease, Liability Held-for-Sale, Current Entity Tax Identification Number Entity Tax Identification Number Operating lease liabilities Deferred Tax Liabilities, Operating Lease Liabilities Deferred Tax Liabilities, Operating Lease Liabilities Reclassified from assets held for sale Goodwill, Reclassified From Assets Held-for-sale Goodwill, Reclassified From Assets Held-for-sale Common stock, shares issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Weighted Average Lease Term - Operating Leases Operating Lease, Weighted Average Remaining Lease Term 2029 Long-Term Debt, Maturity, Year Four GOODWILL AND INTANGIBLE FRANCHISE RIGHTS Goodwill and Intangible Assets Disclosure [Text Block] Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] Number of required principal payments Debt Instrument, Number Of Required Principal Payments Debt Instrument, Number Of Required Principal Payments Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Security Exchange Name Security Exchange Name Goodwill and intangible asset impairment Goodwill and Intangible Asset Impairment Non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Prepaid expenses Prepaid Expense, Current OPERATING EXPENSES: Operating Expenses [Abstract] Statement [Line Items] Statement [Line Items] Change in Contract with Customer, Asset [Roll Forward] Change in Contract with Customer, Asset [Roll Forward] Change in Contract with Customer, Asset [Roll Forward] Extinguishment of debt, amount Extinguishment of Debt, Amount Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Finance Lease, Liability, Payment, Due [Abstract] Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Total current assets Business Combination, Recognized Asset Acquired, Asset, Current Type of Brand [Domain] Type of Brand [Domain] Type of Brand [Domain] Statistical Measurement [Domain] Statistical Measurement [Domain] Other current assets Other Current Assets [Member] Property and equipment, net Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Business Combination [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Schedule of Revenues by Major Brand [Line Items] Schedule of Revenues by Major Brand [Line Items] [Line Items] for Schedule of Revenues by Major Brand [Table] Total maturities of long-term debt Long Term Debt and Lease Obligations1 Long Term Debt and Lease Obligations1 Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Schedule of Performance Share Units Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Floor plan borrowings—non-trade Proceeds From Floor Plan Borrowings Non Trade Borrowings of floorplan notes payable to parties other than the manufacturer of the new vehicle and all floorplan notes payable related to pre-owned vehicles. Assets held for sale Operating Lease, Asset Held-for-Sale Operating Lease, Asset Held-for-Sale Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration] Other long-term assets Other Noncurrent Assets [Member] Interest Rate Swap Interest Rate Swap [Member] Floor plan repayments—divestitures Repayments Of Floor Plan Payables Non Trade Divestitures Repayment of floor plan payables non trade associated with the sale of the related franchise. Unearned premiums Unearned Premiums Leases [Abstract] Leases [Abstract] Basic— Earnings Per Share, Basic [Abstract] 2021 BofA Real Estate Facility 2021 BofA Real Estate Facility [Member] 2021 BofA Real Estate Facility Contract assets (see Note 2) Contract with Customer, Asset, after Allowance for Credit Loss, Current Schedule of Discontinued Operations and Related Results of Business Disposal Groups, Including Discontinued Operations [Table Text Block] Share Repurchase Share Repurchase Policy [Policy Text Block] Share Repurchase Policy [Policy Text Block] Loaner vehicle period of use before sale (in months) Loaner Vehicle Period of Use Before Sale Loaner Vehicle Period of Use Before Sale Repurchase of common stock associated with net share settlements of employee share-based awards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax 5.00% Senior Notes due 2032 Five Point Zero Zero Percent Percent Senior Notes due 2029 [Member] Five Point Zero Zero Percent Percent Senior Notes due 2029 Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Fed Funds Effective Rate Overnight Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Net income (in dollars per share) Earnings Per Share, Basic Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Total deferred income tax assets Deferred Tax Assets, Gross Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Contracts-In-Transit Contracts In Transit [Policy Text Block] Contracts-in-transit policy represents receivables from third-party finance companies for the portion of new and used vehicle purchase price financed by customers through sources arranged by us. Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Deferred revenue Deferred Tax Assets, Tax Deferred Expense, Deferred Revenue Deferred Tax Assets, Tax Deferred Expense, Deferred Revenue Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Loaner vehicles notes payable Notes Payable, Loaner Vehicle, Current Notes Payable, Loaner Vehicle, Current Schedule of Carrying Amounts of Investment Securities and Fair Values Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] 2027 Finance Lease, Liability, to be Paid, Year Three Indefinite-lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Proceeds from the sale of assets Proceeds from Sale of Productive Assets Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Finance And Insurance, Net Finance And Insurance, Net [Member] Finance And Insurance, Net Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Share-based compensation expense Share-Based Payment Arrangement, Expense Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Deferred income taxes Deferred Income Tax Expense (Benefit), Continuing Operations and Discontinued Operations Deferred Income Tax Expense (Benefit), Continuing Operations and Discontinued Operations New Vehicle Floor Plan Facility New Vehicle Floor Plan Facility [Member] New Vehicle Floor Plan Facility [Member] CURRENT ASSETS: Assets, Current [Abstract] Total liabilities and shareholders' equity Liabilities and Equity INVESTMENTS Investments Noncurrent Investments Noncurrent Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Unclaimed property Unclaimed Property Unclaimed Property Other, net Deferred Tax Assets, Other Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Schedule of Floor Plan Notes Payable - Non-Trade Floor Plan Notes Payable - Non-Trade [Table Text Block] Floor Plan Notes Payable - Non-Trade [Table Text Block] Accounting Policies [Abstract] Accounting Policies [Abstract] Floor plan notes payable—trade Floor Plan Notes Payable Trade, Gross Floor Plan Notes Payable Trade, Gross Operating lease liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating lease liabilities Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Repayments of borrowings Repayments of Secured Debt Treasury Stock Treasury Stock, Common [Member] Total fair value of performance share units vested (in millions) Total fair value of restricted stock awards vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Pay vs Performance Disclosure [Line Items] Operating lease, liability Present value of future minimum lease payments Operating Lease, Liability Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction OTHER LONG-TERM LIABILITIES Other long-term liabilities Other Liabilities, Noncurrent Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Impairments Goodwill, Impairment Loss Company vehicles Company Vehicles [Member] Company Vehicles [Member] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three Minimum age requirement Define Contribution Plan, Minimum Age Requirement Define Contribution Plan, Minimum Age Requirement Unrealized gains (losses) on available-for-sale debt securities Unrealized gains (losses) on available-for-sale debt securities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Due in 1 year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Secured Debt Secured Debt [Member] DEFERRED INCOME TAXES Deferred Income Tax Liabilities, Net 2023 Syndicated Revolving Credit Facility 2019 Syndicated Revolving Credit Facility [Member] 2019 Syndicated Revolving Credit Facility Carrying Value of Collateralized Related Real Estate Total carrying value Long-Term Debt 6.0% Senior Subordinated Notes due 2024 Six Point Zero Percent Senior Subordinated Notes Due 2024 [Member] Six Point Zero Percent Senior Subordinated Notes Due 2024 [Member] Total assets Assets Assets General restricted payments allowance General Restricted Payments Allowance General Restricted Payments Allowance Used vehicle retail Used vehicle retail [Member] Used vehicle retail [Member] Vested, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Hyundai Motor America (Hyundai) Hyundai Motor North America (Hyundai and Genesis) [Member] Hyundai Motor North America (Hyundai and Genesis) Restricted Cash and Securities Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] CASH FLOW FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Reduction of new vehicle inventory cost by automobile manufacturer incentives Inventory Adjustments Receivable Type [Axis] Receivable Type [Axis] Other segment items Segment Reporting, Other Segment Item, Amount Number of franchises, sold (in franchises) Number of Franchises, Sold Number of Franchises, Sold INVENTORIES Inventory Disclosure [Text Block] 2025 Real Estate Facility 2025 Real Estate Facility [Member] 2025 Real Estate Facility Stock repurchase program, increase (decrease) in authorized amount Stock Repurchase Program, Increase (Decrease) In Authorized Amount Stock Repurchase Program, Increase (Decrease) In Authorized Amount 2025 Finance Lease, Liability, to be Paid, Year One Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] State income tax expense, net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Notes receivable Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Current Schedule of Components of Income Tax Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Schedule of Amortized Cost and Fair Value of TCA's Investment Investments Classified by Contractual Maturity Date [Table Text Block] Changes in operating assets and liabilities, net of acquisitions and divestitures— Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Results Reclassified from Accumulated Other Comprehensive Income/(Loss) to Earnings Debt Securities, Available-for-Sale, Loss Reclassified from Accumulated OCI into Income, Effective Portion Debt Securities, Available-for-Sale, Loss Reclassified from Accumulated OCI into Income, Effective Portion Retained Earnings Retained Earnings [Member] Statement of Income: Income Statement [Abstract] Cash and cash equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Guarantee Obligations Guarantee Obligations [Member] 12 months or longer, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Derivatives and Fair Value [Abstract] Derivatives and Fair Value [Abstract] Derivatives and Fair Value [Abstract] Interest Expense Interest Expense [Member] Taxes payable, current Taxes Payable, Current Accrued licenses and regulatory fees Accrued Licenses And Regulatory Fees, Current Accrued Licenses And Regulatory Fees, Current Investments Investments, Fair Value Disclosure Accounts receivable Disposal Group, Including Discontinued Operation, Loaners Disposal Group, Including Discontinued Operation, Loaners Floor plan notes payable—new non-trade Floor Plan Notes Payable Non Trade, New, Gross Floor Plan Notes Payable Non Trade, New, Gross Product and Service [Domain] Product and Service [Domain] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Equity securities, FV-NI, realized loss Equity Securities, FV-NI, Realized Loss Employee Retirement Plan, Groups of Participants [Domain] Employee Retirement Plan, Groups of Participants [Domain] [Domain] for Employee Retirement Plan, Groups of Participants [Axis] Business Combination, Recognized Asset Acquired and Liability Assumed Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Customer deposits Contract with Customer, Refund Liability, Current City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Mortgages Mortgages [Member] Components of Inventory [Line Items] Components of Inventory [Line Items] Components of Inventory [Line Items] Schedule of Contract with Customer, Assets Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Net deferred income tax liabilities Deferred Tax Liabilities, Net CASH FLOW FROM INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Loaners, net Disposal Group, Including Discontinued Operation, Operating Lease ROU Assets Disposal Group, Including Discontinued Operation, Operating Lease ROU Assets Interest receivable Interest Receivable Employer matching contribution after one year of employment, percent Defined Contribution Plan, Employer Matching Contribution, Percent of Match Age 50 or More Age Fifty or More [Member] Age Fifty or More [Member] Disposed of by Sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Total lease cost Lease, Cost Parts and Services Parts and Services [Member] Parts and services [Member] GOODWILL Goodwill Net, beginning balance Net, ending balance Goodwill Lease, Cost Lease, Cost [Table Text Block] Expected future recognition of unrecognized compensation expense related to nonvested share-based awards, 2023 Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Year Two Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Expected Future Recognition, Year Two Federal Deferred Federal Income Tax Expense (Benefit) Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group, Current Auditor Name Auditor Name Total by maturity Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Inventories, net Business Combination, Recognized Asset Acquired, Inventory, Current Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] Amortized Cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Goodwill, impaired, accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Other Performance Measure, Amount Other Performance Measure, Amount Payment of debt issuance costs Payments of Debt Issuance Costs Borrowing availability Letters Of Credit, Borrowing Availability Letters Of Credit, Borrowing Availability Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Real Estate Real Estate [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Vesting [Axis] Vesting [Axis] LEASES Lessee, Finance Leases [Text Block] Other current assets Other current assets Other Assets, Current Additional paid-in capital Additional Paid in Capital, Common Stock Interest Rate swap Due December 2031 Interest Rate swap Due 12/2031 [Member] Interest Rate swap Due 12/2031 Investments [Abstract] Net cash (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] Loaner vehicles Other Assets, Current, Service Loaner Vehicles Other Assets, Current, Service Loaner Vehicles Amount Reclassified from AOCI to Earnings Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Gain on dealership divestitures, net Gain on dealership divestitures, net Gain (Loss) on Disposition of Business Interest payments made including amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Lender Name [Axis] Lender Name [Axis] Securities held on deposit, current Securities Held On Deposit, Current Securities Held On Deposit, Current OPERATING LEASE RIGHT-OF-USE ASSETS Operating lease, right-of-use asset Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Income tax provision Effective Income Tax Rate Reconciliation, Percent Used Vehicle Revolving Floor Plan Facility Used Vehicle Revolving Floor Plan Facility [Member] Used Vehicle Revolving Floor Plan Facility [Member] Amortization of costs incurred to obtain a contract with a customer Contract with Customer, Asset, Amortization of costs to obtain a contract with a customer Contract with Customer, Asset, Amortization of costs to obtain a contract with a customer Operating lease cost Operating Lease, Cost Plan Name [Domain] Plan Name [Domain] 2015 Wells Fargo Master Loan Facility 2015 Wells Fargo Master Loan Facility [Member] 2015 Wells Fargo Master Loan Facility [Member] Acquisition related costs Business Combination, Acquisition-Related Cost, Expense Weighted average period of recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Purchase of treasury stock Purchases of Treasury Stock Purchases of Treasury Stock Valuation allowance Deferred Tax Assets, Valuation Allowance Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] 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] U.S. Treasuries US Treasury Securities [Member] Ford Motor Company (Ford and Lincoln) Ford Motor Company (Ford and Lincoln) [Member] Ford Motor Company (Ford and Lincoln) [Member] Federal Current Federal Tax Expense (Benefit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] New Vehicle and Used Vehicle Floor Plan New Vehicle and Used Vehicle Floor Plan [Member] New Vehicle and Used Vehicle Floor Plan [Member] Selling, general and administrative Selling, General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization Revolving Credit Facility Revolving Credit Facility [Member] Number of annual installments Share-Based Compensation Arrangement by Share-Based Payment Award, Number Of Annual Installments Share-Based Compensation Arrangement by Share-Based Payment Award, Number Of Annual Installments Finance lease liability Present value of future minimum lease payments Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Acquiree's earnings (loss) since acquisition date, actual Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Accrued finance and insurance chargebacks Accrued Finance and Insurance Chargebacks, Current Accrued Finance and Insurance Chargebacks, Current Number of collision repair centers (in collision repair centers) Number of Collision Repair Centers Number of Collision Repair Centers Segments [Axis] Segments [Axis] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Total accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Contract assets, long-term Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Thereafter Long-Term Debt, Maturity, after Year Five Retirement of previously repurchased common stock (in shares) Stock Repurchased and Retired During Period, Shares Intangible franchise rights Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill ASSETS Assets [Abstract] Results Recognized in Accumulated Other Comprehensive Income/(Loss) (Effective Portion) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Forfeited, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] SHAREHOLDERS' EQUITY: Equity, Attributable to Parent [Abstract] Award vesting rights, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage New vehicles New Vehicles [Member] New Vehicles Share issues (repurchases) Treasury Stock, Value, Acquired, Cost Method Interest rate swap, net loss amount expected to be reclassified in the next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Stated interest rate of debt instrument Stated interest rate of debt instrument Debt Instrument, Interest Rate, Stated Percentage LONG-TERM LEASE LIABILITY Liabilities, Non-Current, Operating Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity Voluntary Filers Schedule of Components of Inventory [Table] Schedule of Components of Inventory [Table] Schedule of Components of Inventory [Table] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Floor plan repayments—non-trade Repayments Of Floor Plan Payables Non Trade Repayments of floorplan notes payable to parties other than the manufacturer of the new vehicle and all floorplan notes payable related to pre-owned vehicles. Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Municipal Municipal Bonds [Member] Long-term debt Disposal Group, Including Discontinued Operation, Liabilities Other interest expense, net Other interest expense, net Interest Expense, Other Reclassified to assets held for sale Goodwill, Reclassified To Assets Held-for-sale Goodwill, Reclassified To Assets Held-for-sale Cash paid during the period related to floor plan interest Cash paid during the period related to floor plan interest Cash paid during the period related to floor plan interest Parts and accessories Parts and accessories [Member] Parts and Accessories Machinery and equipment Machinery and equipment Machinery and Equipment [Member] Granted, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Senior Subordinated Notes Senior Subordinated Notes [Member] Restatement Determination Date: Restatement Determination Date [Axis] Fair value of interest rate swaps Fair value of interest rate swaps assets (liabilities) Interest Rate Cash Flow Hedge Derivative at Fair Value, Net Number of reporting units Number of Reporting Units Federal Funds Federal Funds [Member] Federal Funds [Member] Schedule of Carrying Values and Fair Values of Liabilities Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Name Trading Arrangement, Individual Name Face amount Debt Instrument, Face Amount Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Real estate facility Real Estate Facility [Member] Real Estate Facility Name Awards Close in Time to MNPI Disclosures, Individual Name Outstanding, beginning balance, weighted average grant date fair value (in dollars per share) Outstanding, ending balance, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Franchise Franchise [Member] Honda Franchise Honda Franchise [Member] Honda Franchise ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay General Motors Company (Chevrolet, Buick and GMC) General Motors Company Chevrolet, Buick and GMC [Member] General Motors Company Chevrolet, Buick and GMC Other Other Accrued Liabilities, Noncurrent New and Used Vehicle New and Used Vehicle [Member] New and used vehicle [Member] Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Floor plan notes payable—trade, net Increase (Decrease) In Floor Plan Notes Payable Trade The net change during the reporting periods of floor plan notes payable with the manufacturer of new vehicles. Finance Lease, Liability, Maturity Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Increases related to revenue recognized, inclusive of adjustments to constraint, during the period Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Percent of cash proceeds receive from sale of equity interests Restricted Payments Capacity, Percent Of Cash Proceeds Receive From Sale Of Equity Interests Restricted Payments Capacity, Percent Of Cash Proceeds Receive From Sale Of Equity Interests Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Investments, net Deferred Tax Liabilities, Investments Loaners Disposal Group, Including Discontinued Operation, Operating Leases, Current Maturities Disposal Group, Including Discontinued Operation, Operating Leases, Current Maturities Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Inventories Increase (Decrease) in Inventories Used Vehicle Floor Plan Facility Used Vehicle Floor Plan Facility [Member] Used Vehicle Floor Plan Facility [Member] Initial purchasers' discounts and expenses Amortization of Debt Issuance Costs and Discounts Number of new vehicle dealerships acquired (in new vehicle dealerships) Number of New Vehicle Dealerships Acquired Number of New Vehicle Dealerships Acquired Earnings per Common Share Earnings Per Share, Policy [Policy Text Block] COST OF SALES: Cost of Revenue [Abstract] Employee Retirement Plan, Groups of Participants [Axis] Employee Retirement Plan, Groups of Participants [Axis] Employee Retirement Plan, Groups of Participants [Axis] Rent and related expenses Rent And Related Expenses Rent And Related Expenses Senior Notes Senior Notes [Member] Purchases of debt securities—available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Total liabilities assumed Acquisition related liabilities Business Combination, Recognized Liability Assumed, Liability All Executive Categories All Executive Categories [Member] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Purchases of previously leased real estate Payments to Acquire Previously Leased Real Estate Payments to Acquire Previously Leased Real Estate Common stock, $.01 par value, 90,000,000 shares authorized; 41,338,419 and 41,649,426 shares issued, including shares held in treasury, respectively Common Stock, Value, Issued Finance lease Assets, Finance Finance Lease, Right-of-Use Asset, after Accumulated Amortization Short term investments Short-Term Investments COMMITMENTS AND CONTINGENCIES (Note 21) Commitments and Contingencies Intangible franchise rights Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination [Axis] Business Combination [Axis] Number of dealership locations (in dealership locations) Number Of Dealership Locations Number Of Dealership Locations Short-term investments Short-Term Investments [Member] Accrued advertising Accrued Advertising PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Due after 10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Diluted— Earnings Per Share, Diluted [Abstract] Base Rate Component, SOFR Base Rate Component, SOFR [Member] Base Rate Component, SOFR Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Goodwill Disposal Group, Including Discontinued Operation, Goodwill Derivative, Number of Instruments Held Derivative, Number of Instruments Held Derivative Contract [Domain] Derivative Contract [Domain] Debt securities, available-for-sale, realized loss Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name 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] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible assets acquired Acquisitions Indefinite-Lived Intangible Assets Acquired Other long-term assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Number of equal monthly principal payments Line of Credit Facility, Number of Equal Monthly Principal Payments Line of Credit Facility, Number of Equal Monthly Principal Payments Pro forma revenue Business Combination, Pro Forma Information, Pro Forma Revenue Indefinite-lived Intangible Assets [Roll Forward] Indefinite-Lived Intangible Assets [Roll Forward] Schedule of Revenue by Major Brand Schedule of Revenue by Major Brand [Table Text Block] Schedule of Revenue by Major Brand [Table Text Block] Interest Rate swap Due December 2026 Interest Rate swap Due 2026 [Member] Interest Rate swap Due 2026 Less: current obligations under leases Operating Lease, Liability, Including Held-For-Sale, Current Operating Lease, Liability, Including Held-For-Sale, Current Loaner vehicle amortization Cost, Depreciation and Amortization Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Number of collision centers acquired (in collision centers) Number of Collision Centers Acquired Number of Collision Centers Acquired Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Number of franchises (in franchises) Number of Franchises Number of Franchises EARNINGS PER COMMON SHARE: Earnings Per Share [Abstract] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Five Stellantis N.V. (Chrysler, Dodge, Jeep, Ram and Fiat) Mercedes-Benz USA, LLC (Mercedes-Benz, Smart and Sprinter) [Member] Mercedes-Benz USA, LLC (Mercedes-Benz, Smart and Sprinter) [Member] Floor plan notes payable offset account Floor Plan Notes Payable Non Trade, Offsets Floor Plan Notes Payable Non Trade, Offsets Total other expenses, net Nonoperating Income (Expense) Number of vehicle brands (in vehicle brands) Number of Vehicle Brands Number of Vehicle Brands Divestitures Goodwill, Written off Related to Sale of Business Unit Revenues by major brand, percentage Entity-Wide Revenues, Major Brand, Percentage Entity-Wide Revenues, Major Brand, Percentage Contracts-in-transit Increase (Decrease) in Contract with Customer, Liability Nissan Franchise Nissan Franchise [Member] Nissan Franchise Debt instrument, repaid, principal Debt Instrument, Repaid, Principal Purchase of treasury shares (in shares) Treasury Stock, Shares, Acquired Thereafter Finance Lease, Liability, to be Paid, after Year Five Award Timing Disclosures [Line Items] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Net assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group Parts And Service Parts And Service [Member] Parts And Service State Deferred State and Local Income Tax Expense (Benefit) NET INCOME Net income Net Income (Loss) Attributable to Parent Construction in progress Construction in Progress [Member] Other Other Accrued Liabilities, Current Reconciliation of the Statutory Federal Rate to the Effective Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Toyota Franchise Toyota Franchise [Member] Toyota Franchise OTHER CURRENT ASSETS Other Current Assets [Text Block] Number of instruments provided for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Instruments Provided for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Instruments Provided for Grant Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Repurchases of common stock, including amounts associated with net share settlements of employee share-based awards Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Base Rate Base Rate [Member] Beginning balance Ending balance Contract with Customer, Asset, after Allowance for Credit Loss INCOME FROM OPERATIONS INCOME FROM OPERATIONS Operating Income (Loss) Line of Credit Line of Credit [Member] Capital expenditures—real estate Payments to Acquire Real Estate Retained earnings Retained Earnings (Accumulated Deficit) Interest Rate swap Due December 2028 Interest Rate swap Due December 2028 [Member] Interest Rate swap Due December 2028 Loaner vehicles transferred from other current assets to inventory Loaner Vehicles, Amount Transferred from Other Current Assets to Inventory Loaner vehicles transferred from other current assets to inventory on the condensed consolidated balance sheets 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] 2013 BofA Real Estate Facility 2013 BofA Real Estate Facility [Member] 2013 BofA Real Estate Facility [Member] 2019 Senior Credit Facility 2019 Senior Credit Facility [Member] 2019 Senior Credit Facility Maximum annual contributions per employee, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Collision centers acquired Business Combination, Collision Centers Acquired Business Combination, Collision Centers Acquired Asset impairments Asset impairments Impairment of Intangible Assets, Finite-Lived FLOOR PLAN NOTES PAYABLE—NON-TRADE Floor Plan Notes Payable Non-Trade [Text Block] Floor Plan Notes Payable Non-Trade [Text Block] 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] Other, net Deferred Tax Liabilities, Other Liabilities associated with assets held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current F&I chargeback liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves Payables and Accruals [Abstract] Payables and Accruals [Abstract] Statement [Table] Statement [Table] Schedule of Business Acquisitions Business Combination [Table Text Block] Total Deferred Income Tax Expense Deferred Income Tax Expense (Benefit) 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] CASH FLOW FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Accrued finance and insurance chargebacks Accrued Finance and Insurance Chargebacks, Noncurrent Accrued Finance and Insurance Chargebacks, Noncurrent Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Schedule of Other Long-Term Liabilities Schedule of Other Long-Term Liabilities [Table Text Block] Schedule of Other Long-Term Liabilities [Table Text Block] Variable Rate [Domain] Variable Rate [Domain] Available-for-Sale, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Assumed contract liabilities Contract with Customer, Liability Liabilities, Non-Current, Finance Long-term lease obligation (b) Finance Lease, Liability, Noncurrent All Adjustments to Compensation All Adjustments to Compensation [Member] Treasury stock, shares, retired (in shares) Treasury Stock, Shares, Retired Amendment Flag Amendment Flag Share-based compensation expense, tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Available-for-Sale, Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized 2019 Plan 2019 Equity and Incentive Compensation Plan [Member] 2019 Equity and Incentive Compensation Plan [Member] Schedule of Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Treasury stock, at cost; 22,109,690 and 22,065,478 shares, respectively Treasury Stock, Common, Value Senior Credit Facility Senior Credit Facility [Member] Senior Credit Facility [Member] Termination Date Trading Arrangement Termination Date Deferred revenue Increase (Decrease) in Contract with Customer, Asset Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Stellantis N.V. (Chrysler, Dodge, Jeep, Ram and Fiat) Stellantis N.V. Chrysler, Dodge, Jeep, Ram and Fiat [Member] Stellantis N.V. Chrysler, Dodge, Jeep, Ram and Fiat Receivable [Domain] Receivable [Domain] Share-Based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Weighted Average Discount Rate - Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Acquiree's revenue since acquisition date, actual Business Combination, Acquiree's Revenue since Acquisition Date, Actual Basic (in shares) Weighted Average Number of Shares Outstanding, Basic SUPPLEMENTAL CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] Floor plan notes payable—trade, net Total floor plan notes payable—trade, net Floor Plan Notes Payable Trade Amounts borrowed to finance the purchase of specific new vehicle inventories with the corresponding manufacturers' captive finance subsidiaries ("trade lenders"). Segment Reporting [Abstract] TOTAL COST OF SALES TOTAL COST OF SALES Cost of Revenue Debt Disclosure [Abstract] Debt Disclosure [Abstract] Vehicle receivables Vehicle Receivables [Member] Vehicle Receivables [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Interest Rate swap Due May 2031 Interest Rate swap Due 5/2031 [Member] Interest Rate swap Due 5/2031 Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Income taxes receivable, current Income Taxes Receivable, Current Long-term debt, including current portion Long Term Debt and Lease Obligations, Current and Noncurrent, Including Unamortized Premium (Discount) Long Term Debt and Lease Obligations, Current and Noncurrent, Including Unamortized Premium (Discount) Use of Estimates Use of Estimates, Policy [Policy Text Block] Operating cash flows from finance lease Finance Lease, Interest Payment on Liability Insider Trading Arrangements [Line Items] Debt instrument, amount available for conversion Debt Instrument, amount Available for Conversion Debt Instrument, amount Available for Conversion Operating Lease, Liability Held-for-Sale, Noncurrent Operating Lease, Liability Held-for-Sale, Noncurrent Operating Lease, Liability Held-for-Sale, Noncurrent Allowance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Vehicle Repair and Maintenance Services Vehicle Repair and Maintenance Services [Member] Vehicle repair and maintenance services [Member] Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Restricted payments capacity, percent of net income Restricted Payments Capacity, Percent Of Net Income Restricted Payments Capacity, Percent Of Net Income Total by maturity Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost 2029 Finance Lease, Liability, to be Paid, Year Five Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Variable Rate [Axis] Variable Rate [Axis] Deferred Revenue Location [Domain] Deferred Revenue Location [Domain] Deferred Revenue Location [Domain] Deferral of SG&A expense (related to capitalized contracts offset by amortization) Deferral Of Selling, General And Administrative Expenses Deferral Of Selling, General And Administrative Expenses Fair Value Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate Corporate Debt Securities [Member] UNITED STATES