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 Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Prepaid taxes Prepaid Taxes Adjustments to reconcile net income to net cash provided by operating activities— Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Income tax provision at the statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount 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 Cover [Abstract] Cover [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Finance and insurance, net Finance and insurance [Member] Finance and insurance [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Intangible Asset, Indefinite-Lived [Table] Intangible Asset, Indefinite-Lived [Table] Allowance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 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 Trading Symbol Trading Symbol LONG-TERM DEBT Long-term debt Long-Term Debt and Lease Obligation Non-NEOs Non-NEOs [Member] Operating lease liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities Share-based compensation expense, tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Less—Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Fair value of interest rate swaps Fair value of interest rate swaps assets (liabilities) Interest Rate Cash Flow Hedge Derivative at Fair Value, Net Short-term investments Short-Term Investments [Member] Purchases of equity securities Payments to Acquire Equity Securities, FV-NI 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 Accounts receivable Increase (Decrease) in Accounts Receivable Earnings per Common Share Earnings Per Share, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Land Land [Member] Unrealized loss on changes in fair value of debt securities, net of $0.8 million tax benefit OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Award Timing Disclosures [Line Items] Components of Inventory [Domain] Component of Inventory [Domain] Component of Inventory [Domain] Other receivables Other Trade Accounts Receivable [Member] Other Trade Accounts Receivable [Member] Collision centers to be acquired Business Combination, Collision Centers To Be Acquired Business Combination, Collision Centers To Be Acquired Percent of principal amount Redemption Amount Pro Rata Basis, Percent Redemption Amount Pro Rata Basis, Percent Floor plan interest expense Floor Plan interest Expense Interest expense incurred on vehicle floorplan payable trade and non-trade outstanding during the period. Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Plan Name [Domain] Plan Name [Domain] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] 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] OTHER LONG-TERM ASSETS Other Assets, Noncurrent Leases [Abstract] Leases [Abstract] Advertising credits and volume discounts Advertising Credits and Volume Discounts Advertising Credits and Volume Discounts 2018 Wells Fargo Master Loan Facility 2018 Wells Fargo Master Loan Facility [Member] 2018 Wells Fargo Master Loan Facility [Member] Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Non-cash, impairment of intangible assets, finite-lived, pre-tax Non-Cash, Impairment of Intangible Assets, Finite-Lived, Pre-Tax Non-Cash, Impairment of Intangible Assets, Finite-Lived, Pre-Tax Operating Segments Operating Segments [Member] Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Receivable Type [Axis] Receivable Type [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOW FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Schedule of Aggregate Maturities Contractual Obligation, Fiscal Year Maturity [Table Text Block] Prepaid expenses Prepaid Expense, Current Award Timing Method Award Timing Method [Text Block] Total by maturity Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Weighted Average Lease Term - Finance Lease Finance Lease, Weighted Average Remaining Lease Term Insider Trading Policies and Procedures [Line Items] Proceeds from dealership divestitures Proceeds from Divestiture of Businesses Use of Estimates Use of Estimates, Policy [Policy Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Additional paid-in capital Additional Paid in Capital, Common Stock Payables and Accruals [Abstract] Payables and Accruals [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Amount of surety bond line maintained Amount of Surety Bond Line Maintained Amount of Surety Bond Line maintained in the ordinary course of business. Disposal Group Classification [Axis] Disposal Group Classification [Axis] Number of states (in states) Number of States in which Entity Operates 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] Entity Small Business Entity Small Business ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Company Selected Measure Amount Company Selected Measure Amount Amount Reclassified from AOCI to Earnings Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Capital expenditures—real estate Payments to Acquire Real Estate Payment of debt issuance costs Payments of Debt Issuance Costs Tabular List, Table Tabular List [Table Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] 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 Customer we owe liabilities Accrued Liabilities, Current Share-Based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Less: Amount of lease payments representing interest Finance Lease, Liability, Undiscounted Excess Amount Credit Facility [Domain] Credit Facility [Domain] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Herb Chambers Dealerships Herb Chambers Dealerships [Member] Herb Chambers Dealerships Number of dealership locations, sold (in dealership locations) Number Of Dealership Locations, Sold Number Of Dealership Locations, Sold INTANGIBLE FRANCHISE RIGHTS Indefinite-Lived Franchise Rights GOODWILL Goodwill Net, beginning balance Net, ending balance Goodwill Bank of America Bank of America, N.A. [Member] Bank of America, N.A. [Member] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount INVENTORIES Inventory Disclosure [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] 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] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Unearned premiums Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Deferred Tax Liabilities, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Comprehensive income Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Weighted Average Discount Rate - Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Debt Instrument, Repaid, Principal Debt Instrument, Repaid, Principal Repayments of revolving credit facility Repayments of Lines of Credit Municipal Municipal Bonds [Member] 2025 Finance Lease, Liability, to be Paid, Year One Schedule of Amortized Cost and Fair Value of TCA's Investment Investments Classified by Contractual Maturity Date [Table Text Block] Award Type [Axis] Award Type [Axis] Net deferred income tax liabilities Deferred Tax Liabilities, Net Corporate Corporate Debt Securities [Member] 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 Basic— Earnings Per Share, Basic [Abstract] Liabilities: Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Restricted Cash and Securities Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Base Rate Component, Federal Funds Base Rate Component, Federal Funds [Member] Federal Funds [Member] Other Other Accrued Liabilities, Noncurrent PROPERTY AND EQUIPMENT, net Property, Plant and Equipment, Net ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag 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 Number of Reporting Units Number of Reporting Units Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Acquired intangible asset, useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Revolving Credit Facility Revolving Credit Facility [Member] Expiration Date Trading Arrangement Expiration Date Mortgage Agreement [Axis] Mortgage Agreement [Axis] Mortgage Agreement [Axis] CASH FLOW FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Other Assets [Abstract] Other Assets [Abstract] Transferred to receivables from contract assets recognized at the beginning of the period Contract with Customer, Asset, Reclassified to Receivable Current maturities of operating leases Liabilities, Current, Operating Operating Lease, Liability, Current Total Shareholder Return Amount Total Shareholder Return Amount Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [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 Due after 10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Jim Koons Dealerships Jim Koons Dealerships [Member] Jim Koons Dealerships Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Taxes payable Taxes Payable, Current, Excluding Income Taxes Payable Taxes Payable, Current, Excluding Income Taxes Payable Debt securities, available-for-sale, realized gain Debt Securities, Available-for-Sale, Realized Gain Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Subsequent Event [Line Items] Subsequent Event [Line 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Consideration To Be Transferred Business Combination, Consideration To Be Transferred MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Total shareholders' equity Equity, Attributable to Parent Total deferred income tax assets Deferred Tax Assets, Gross Proceeds from issuance of debt Proceeds from Issuance of Debt Due in 1 year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Dealer Name [Domain] Dealer Name [Domain] Dealer Name [Domain] Business Combinations [Abstract] Amount of letters of credit outstanding Letters of Credit Outstanding, Amount Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Selling, general and administrative Selling, General and Administrative Expense Intangible asset amortization Deferred Tax Liabilities, Intangible asset amortization Deferred Tax Liabilities, Intangible asset amortization 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 shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Document Fiscal Period Focus Document Fiscal Period Focus 2028 Long-Term Debt, Maturity, Year Four Acquisition related costs Business Combination, Acquisition Related Costs All Executive Categories All Executive Categories [Member] Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] 4.75% Senior Notes due 2030 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] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] ASSETS Assets [Abstract] Document Type Document Type Derivative Contract [Domain] Derivative Contract [Domain] Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Maximum annual contributions per employee, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Used Floor Plan Facility Used Floor Plan Facility [Member] Used Floor Plan Facility Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Wells Fargo Wells Fargo Bank, National Association [Member] Wells Fargo Bank, National Association [Member] 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 Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Schedule of Contract with Customer, Assets Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Subsequent Event [Table] Subsequent Event [Table] Maximum Maximum [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Loaner Vehicle Notes Payable - OEMs Loaner Vehicle Notes Payable - OEMs [Member] Loaner Vehicle Notes Payable - OEMs DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business Description and Accounting Policies [Text Block] Furniture and fixtures Furniture and Fixtures [Member] ACQUISITIONS AND DIVESTITURES Business Combination and Divestitures Disclosure [Text Block] Business Combination and Divestitures Disclosure [Text Block] Accounts payable Accounts Payable, Current Investment Type [Axis] Investment Type [Axis] 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] SOFR Plus Basis Spread SOFR Plus Basis Spread [Member] SOFR Plus Basis Spread Total lease cost Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] 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 Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Comprehensive Income (Loss): Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Name Outstanding Recovery, Individual Name Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Variable lease cost Variable Lease, Cost Impairments Goodwill, Impairment Loss Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Goodwill Disposal Group, Including Discontinued Operation, Goodwill Award Timing Predetermined Award Timing Predetermined [Flag] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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 Redemption price, percentage Debt Instrument, Redemption Price, Percentage Net income (in dollars per share) Earnings Per Share, Diluted Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Schedule of Performance Share Units Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Contracts-in-transit Increase (Decrease) in Contract with Customer, Liability Total Current Income Tax Expense Current Income Tax Expense (Benefit) Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Dealerships to be acquired Business Combination, Dealerships To Be Acquired Business Combination, Dealerships To Be Acquired Award vesting rights, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Aggregate Principal Outstanding SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Balance Sheet: Statement of Financial Position [Abstract] Schedule of Floor Plan Notes Payable - Trade Floor Plan Notes Payable - Trade [Table Text Block] Floor Plan Notes Payable - Trade [Table Text Block] Self-insurance Programs Self Insurance Reserve [Policy Text Block] Other, net Deferred Tax Liabilities, Other 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 Maximum annual contribution per employee Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount Inventories, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Income tax expense Total Income Tax Expense Income Tax Expense (Benefit) Additional debt issuance costs Additional Debt Issuance Costs, Net Additional Debt Issuance Costs, Net Deposits Deposits Assets, Current Weighted average period of recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Number of quarterly principal payments Line of Credit Facility, Number of Quarterly Principal Payments Line of Credit Facility, Number of Quarterly Principal Payments Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Franchise rights Franchise Rights [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] All Adjustments to Compensation All Adjustments to Compensation [Member] Accrued compensation and benefits Employee-related Liabilities, Current 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 Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] 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 Disposed of by Sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Reduction of new vehicle inventory cost by automobile manufacturer incentives Inventory Adjustments 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] Divestitures Indefinite-Lived Intangible Assets, Written off Related to Sale of Business Unit Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity Address, State or Province Entity Address, State or Province Dealerships Dealerships [Member] Dealerships Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Schedule of Components of Inventory [Line Items] Schedule of Components of Inventory [Line Items] Schedule of Components of Inventory [Line Items] Components of Inventory [Domain] Inventory [Domain] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] 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 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Receivables [Member] Deferred Sales Commissions Deferred Sales Commissions [Member] Deferred Sales Commissions FINANCIAL INSTRUMENTS AND FAIR VALUE Derivatives and Fair Value [Text Block] Amortization schedule Line of Credit Facility, Amortization Schedule Line of Credit Facility, Amortization Schedule Restatement Determination Date Restatement Determination Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Schedule of Carrying Amounts of Investment Securities and Fair Values Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Maximum percent of target earned Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percent of Target Earned Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percent of Target Earned OPERATING LEASE 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Name [Axis] Dealer Name [Axis] Dealer Name Subsequent Event Subsequent Event [Member] Components of Inventory [Axis] Inventory [Axis] Change in fair value of cash flow swaps Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax 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 Income Taxes Income Tax, Policy [Policy Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Parts and services Parts and services [Member] Parts and services [Member] Segments [Domain] Segments [Domain] Finance Lease, Liability, Maturity Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Mortgage Notes Payable Mortgage Notes Payable [Member] Mortgage Notes Payable DELAWARE DELAWARE Proceeds from revolving credit facility Proceeds from Lines 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Payment Arrangement, Tranche Three [Member] 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] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Local Phone Number Local Phone Number Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Valuation allowance Deferred Tax Assets, Valuation Allowance Other Other Assets, Miscellaneous, Current Statements of Cash Flows Statement of Cash Flows, Policy [Policy Text Block] Statement of Cash Flows, Policy [Policy Text Block] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] OTHER CURRENT ASSETS Other Current Assets [Text Block] Changes in operating assets and liabilities, net of acquisitions and divestitures— Increase (Decrease) in Operating Capital [Abstract] Investments, net Deferred Tax Liabilities, Investments PEO Total Compensation Amount PEO Total Compensation Amount 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] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Accrued interest Interest Payable, Current Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Consolidated total leverage ratio Debt Instrument, Consolidated Total Leverage Ratio Debt Instrument, Consolidated Total Leverage Ratio Common Stock Common Stock [Member] Goodwill and manufacturer franchise rights, period for federal and state tax deductions Intangible Assets (Including Goodwill), Period for Federal and State Tax Deductions Intangible Assets (Including Goodwill), Period for Federal and State Tax Deductions 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 Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Revenue, Finance And Insurance Revenue, Finance And Insurance [Member] Revenue, Finance And Insurance Line of Credit Line of Credit [Member] Segment Reporting [Abstract] New Floor Plan Facility New Floor Plan Facility [Member] New Floor Plan Facility 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 Entity Central Index Key Entity Central Index Key Other segment items Segment Reporting, Other Segment Item, Amount Loaner Vehicle Notes Payable - Bank of America Loaner Vehicle Notes Payable - Bank of America [Member] Loaner Vehicle Notes Payable - Bank of America Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Senior Subordinated Notes Senior Subordinated Notes [Member] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Other selling, general and administrative expense Other Selling, General and Administrative Expense Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Financial Instrument [Axis] Financial Instrument [Axis] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] 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] Mortgage and other asset-backed securities Mortgage And Other Assets Backed Securities [Member] Mortgage And Other Assets Backed Securities Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Restricted Stock Awards Restricted Stock [Member] Redemption amount pro rata basis Redemption Amount Pro Rata Basis Redemption Amount Pro Rata Basis Title Trading Arrangement, Individual Title City Area Code City Area Code CURRENT LIABILITIES: Liabilities, Current [Abstract] Auditor Location Auditor Location Other accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Operating lease right-of-use assets Deferred Tax Assets, Right of Use Assets Deferred Tax Assets, Right of Use Assets Amortization of deferred acquisition costs Business Acquisition, Deferred Acquisition Costs, Amortization Business Acquisition, Deferred Acquisition Costs, Amortization Disposal Group Classification [Domain] Disposal Group Classification [Domain] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] GEORGIA GEORGIA Schedule of Business Organization Schedule of Business Organization [Table] Schedule of Business Organization [Table] Repurchases of common stock, including amounts associated with net share settlements of employee share-based awards Payments for Repurchase of Common Stock 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). Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] 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] Vesting period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Defined Contribution Plan, Employers Matching Contribution, Vesting Period Subsequent Event Type [Axis] Subsequent Event Type [Axis] EARNINGS PER COMMON SHARE: Earnings Per Share [Abstract] Depreciation Deferred Tax Liabilities, Depreciation Deferred Tax Liabilities, Depreciation Available-for-Sale, Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Retirement of previously repurchased common stock (in shares) Stock Repurchased and Retired During Period, Shares Inventories Increase (Decrease) in Inventories Change in right-of-use asset Change in Operating Lease, Right of Use Asset Change in Operating Lease, Right of Use Asset 2026 Long-Term Debt, Maturity, Year Two Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Operating lease, liability Present value of future minimum lease payments Operating Lease, Liability Underlying Securities Award Underlying Securities Amount Schedule of Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Performance Share Units Performance Shares [Member] LHM Acquisition LHM [Member] LHM Schedule of Mortgage Notes Payable Schedule of Mortgage Notes Payable [Table Text Block] Schedule of Mortgage Notes Payable [Table Text Block] 2029 Finance Lease, Liability, to be Paid, Year Five Amendment Flag Amendment Flag Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Machinery and equipment Machinery and equipment Machinery and Equipment [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Proceeds from the sale of equity securities Proceeds from Sale of Equity Securities, FV-NI Long Lived Assets Held-for-sale [Line Items] Long-Lived Assets Held-for-Sale [Line Items] SUPPLEMENTAL CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] Less: debt issuance costs Unamortized debt issuance expense Debt Issuance Costs, Net Due in 1 year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One DEBT Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Face amount Debt Instrument, Face Amount Number of franchise, sold (in franchises) Number of franchise, sold Number of franchise, sold Entity Address, Postal Zip Code Entity Address, Postal Zip Code Advertising Advertising Expense Interest Rate Swap Interest Rate Swap [Member] Business Organization [Line Items] Business Organization [Line Items] Business Organization [Line Items] 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 Cash equivalents Cash and Cash Equivalents, at Carrying Value Audit Information [Abstract] Audit Information Other long-term assets Other Noncurrent Assets [Member] 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] Auditor Name Auditor Name 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 Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] 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. 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] 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 Estimated useful life (in years) Property, Plant and Equipment, Useful Life Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total right-of-use assets Leases, Right-of-Use Asset Leases, Right-of-Use Asset Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization 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. Non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] WEIGHTED AVERAGE COMMON SHARES OUTSTANDING: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Assets Assets Advertising Advertising Cost [Policy Text Block] 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 Income taxes receivable, current Income Taxes Receivable, Current OTHER LONG-TERM LIABILITIES Other long-term liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount COMMITMENTS AND CONTINGENCIES (Note 21) Commitments and Contingencies Share-based Compensation Share-Based Payment Arrangement [Policy Text Block] Reconciliation of the Statutory Federal Rate to the Effective Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Termination Date Trading Arrangement Termination Date Used vehicle wholesale Used vehicle wholesale [Member] Used vehicle wholesale [Member] 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] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Accrued insurance Accrued Insurance, Current 2025 Long-Term Debt, Maturity, Year One Number of dealership locations acquired (in dealership locations) Number of Dealership Locations Acquired Number of Dealership Locations Acquired Debt instrument, variable rate, minimum Debt Instrument, Variable Rate, Minimum Debt Instrument, Variable Rate, Minimum Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] 4.50% Senior Notes due 2028 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] Used vehicle Used vehicles Used Vehicles [Member] Used Vehicles Due in 1-5 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] NET INCOME Net income Net Income (Loss) Attributable to Parent Other operating income, net Other operating income Other Operating Income (Expense), Net Trading Arrangement: Trading Arrangement [Axis] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Notes receivable Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Current Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Due after 10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Assets And Liabilities, Lessee Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Entity File Number Entity File Number Statement of Income: Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Operating Lease, Liability Held-for-Sale, Current Operating Lease, Liability Held-for-Sale, Current Operating Lease, Liability Held-for-Sale, Current Federal Current Federal Tax Expense (Benefit) Extinguishment of debt, amount Extinguishment of Debt, Amount Entity Address, Address Line Two Entity Address, Address Line Two Operating lease liabilities Deferred Tax Liabilities, Operating Lease Liabilities Deferred Tax Liabilities, Operating Lease Liabilities Name Forgone Recovery, Individual Name Weighted Average Lease Term - Operating Leases Operating Lease, Weighted Average Remaining Lease Term Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Lower of cost or market inventory reserves Inventory Valuation Reserves Reclassified from assets held for sale Goodwill, Reclassified From Assets Held-for-sale Goodwill, Reclassified From Assets Held-for-sale Investments Investment, Policy [Policy Text Block] Other adjustments, net Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Vehicle repair and maintenance services Vehicle repair and maintenance services [Member] Vehicle repair and maintenance services [Member] Equity securities, FV-NI, realized gain Equity Securities, FV-NI, Realized Gain Beginning balance Ending balance Contract with Customer, Asset, after Allowance for Credit Loss Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] NORTH CAROLINA NORTH CAROLINA PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount TOTAL COST OF SALES TOTAL COST OF SALES Cost of Revenue Adjustment to Compensation: Adjustment to Compensation [Axis] Divestitures Goodwill, Written off Related to Sale of Business Unit Due in 1-5 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five MISSOURI MISSOURI Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] 12 months or longer, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Proceeds from the sale of assets Proceeds from Sale of Productive Assets Balance Balance Equity, Including Portion Attributable to Noncontrolling Interest Initial purchasers' discounts and expenses Amortization of Debt Issuance Costs and Discounts Property and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Change in Contract with Customer, Asset [Roll Forward] Change in Contract with Customer, Asset [Roll Forward] Change in Contract with Customer, Asset [Roll Forward] Name Awards Close in Time to MNPI Disclosures, Individual Name Construction in progress Construction in Progress [Member] Less than 12 months, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Entity Filer Category Entity Filer Category Balance (in shares) Balance (in shares) Shares, Issued COST OF SALES: Cost of Revenue [Abstract] Loss Contingencies [Line Items] Loss Contingencies [Line Items] NEW MEXICO NEW MEXICO Type of Brand [Domain] Type of Brand [Domain] Type of Brand [Domain] New and used vehicle New and used vehicle [Member] New and used vehicle [Member] Goodwill acquired Acquisitions Goodwill, Acquired During Period 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] Statistical Measurement [Domain] Statistical Measurement [Domain] Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Contract assets (see Note 2) Contract with Customer, Asset, after Allowance for Credit Loss, Current Lease, Cost Lease, Cost [Table Text Block] Total maturities of long-term debt Long Term Debt and Lease Obligations1 Long Term Debt and Lease Obligations1 Total debt securities Debt Securities [Member] 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 Equity securities, FV-NI, realized loss Equity Securities, FV-NI, Realized Loss 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. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] 2021 BofA Real Estate Facility 2021 BofA Real Estate Facility [Member] 2021 BofA Real Estate Facility Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Share Repurchase Share Repurchase Policy [Policy Text Block] Share Repurchase Policy [Policy Text Block] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative [Line Items] Derivative [Line Items] Assets: Disposal Group, Including Discontinued Operation, Assets [Abstract] Income taxes paid Income Taxes Paid, Net Loaner vehicle period of use before sale (in months) Loaner Vehicle Period of Use Before Sale Loaner Vehicle Period of Use Before Sale 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 Goodwill, measurement period adjustment Goodwill, Measurement Period Adjustment Pay vs Performance Disclosure [Line Items] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Derivative [Table] Derivative [Table] 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. Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Texas TEXAS Schedule of Derivative Instruments Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Deferred revenue Deferred Tax Assets, Tax Deferred Expense, Deferred Revenue Deferred Tax Assets, Tax Deferred Expense, Deferred Revenue Other long-term assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Loaner vehicles notes payable Notes Payable, Loaner Vehicle, Current Notes Payable, Loaner Vehicle, Current Other Performance Measure, Amount Other Performance Measure, Amount Gain on divestitures, net Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Results Recognized in Accumulated Other Comprehensive Income (Loss) (Effective Portion) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Goodwill [Line Items] Goodwill [Line Items] LEASES Lessee, Operating Leases [Text Block] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Operating lease cost Operating Lease, Cost Number of shares still available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant LONG-TERM LEASE LIABILITY Liabilities, Non-Current, Operating Operating Lease, Liability, Noncurrent Interest receivable Interest Receivable Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Finance lease cost (Interest) Finance Lease, Interest Expense Finance And Insurance, Net Finance And Insurance, Net [Member] Finance And Insurance, Net Debt securities, available-for-sale, realized loss Debt Securities, Available-for-Sale, Realized Loss Deferred revenue—current Contract with Customer, Liability, Current Entity Tax Identification Number Entity Tax Identification Number 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] Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Purchase of treasury shares (in shares) Treasury Stock, Shares, Acquired ACCOUNTS RECEIVABLE Loans, Notes, Trade and Other Receivables Disclosure [Text Block] INVESTMENTS Investments Noncurrent Investments Noncurrent Sale of vehicle parts and accessories Sale of vehicle parts and accessories [Member] Sale of vehicle parts and accessories [Member] Deferred Sales Commissions Deferred Commissions [Member] Deferred Commissions Treasury Stock Treasury Stock, Common [Member] Unclaimed property Unclaimed Property Unclaimed Property Taxes payable, current Taxes Payable, Current Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Deferred income tax assets: Deferred Tax Assets, Net [Abstract] U.S Treasury US Treasury Securities [Member] Intersegment Eliminations Intersegment Eliminations [Member] Operating lease liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Operating lease liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Operating lease liabilities Plan Name [Axis] Plan Name [Axis] Thereafter Finance Lease, Liability, to be Paid, after Year Five 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] Real estate to be acquired Business Combination, Real Estate To Be Acquired Business Combination, Real Estate To Be Acquired Floor plan notes payable—trade Floor Plan Notes Payable Trade, Gross Floor Plan Notes Payable Trade, Gross Equity Components [Axis] Equity Components [Axis] Total minimum lease payments Finance Lease, Liability, to be Paid Other current assets Other current assets Other Assets, Current Fair Value Debt Securities, Available-for-Sale Pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Receivable [Domain] Receivable [Domain] Investments [Domain] Investments [Domain] Diluted— Earnings Per Share, Diluted [Abstract] Customer deposits Contract with Customer, Refund Liability, Current Nissan Nissan [Member] Nissan Geographical [Axis] Geographical [Axis] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Five Company vehicles Company Vehicles [Member] Company Vehicles [Member] Gain on dealership divestitures, net Gain on dealership divestitures, net Gain (Loss) on Disposition of Business Accounts receivable, net Accounts receivable, net Receivables, Net, Current 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] Minimum age requirement Define Contribution Plan, Minimum Age Requirement Define Contribution Plan, Minimum Age Requirement Other Liabilities Other Liabilities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets SHARE-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS Compensation and Employee Benefit Plans [Text Block] Accrued advertising Accrued Advertising Fair Value Total Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Cash and cash equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Total unrecognized share-based compensation expense related to nonvested awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount CURRENT ASSETS: Assets, Current [Abstract] Consolidation Items [Axis] Consolidation Items [Axis] 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] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] General restricted payments allowance General Restricted Payments Allowance General Restricted Payments Allowance Used vehicle retail Used vehicle retail [Member] Used vehicle retail [Member] New Vehicle Revolving Floor Plan Facility New Vehicle Floor Plan [Member] New Vehicle Floor Plan [Member] Hyundai Motor North America (Hyundai and Genesis) Hyundai Motor North America (Hyundai and Genesis) [Member] Hyundai Motor North America (Hyundai and Genesis) Treasury stock (in shares) Treasury Stock, Common, Shares Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Product and Service [Domain] Product and Service [Domain] Short-term lease cost Short-Term Lease, Cost 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 Fair Value Disclosures [Abstract] Goodwill [Roll Forward] Goodwill [Roll Forward] Number of franchises, sold (in franchises) Number of Franchises, Sold Number of Franchises, Sold Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Security Exchange Name Security Exchange Name Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Interest Rate swap Due November 2025 Interest Rate swap Due November 2025 [Member] Interest Rate swap Due November 2025 Stock repurchase program, increase (decrease) in authorized amount Stock Repurchase Program, Increase (Decrease) In Authorized Amount Stock Repurchase Program, Increase (Decrease) In Authorized Amount 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] State Current State and Local Tax Expense (Benefit) Personnel costs Labor and Related Expense Chevrolet Chevrolet [Member] Chevrolet Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Debt Securities, Available-for-sale Debt Securities, Available-for-Sale [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity WASHINGTON WASHINGTON 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 Total Assets Disposal Group, Including Discontinued Operation, Assets Unrealized Losses Total Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Indefinite-lived Intangible Assets [Roll Forward] Indefinite-Lived Intangible Assets [Roll Forward] Derivatives and Fair Value [Abstract] Derivatives and Fair Value [Abstract] Derivatives and Fair Value [Abstract] Accrued licenses and regulatory fees Accrued Licenses And Regulatory Fees, Current Accrued Licenses And Regulatory Fees, Current Goodwill and intangible asset impairment Goodwill and Intangible Asset Impairment Common stock, shares authorized (in shares) Common Stock, Shares Authorized Loaners, net Disposal Group, Including Discontinued Operation, Loaners Disposal Group, Including Discontinued Operation, Loaners Acquisitions Payments to Acquire Businesses, Net of Cash Acquired Floor plan notes payable—new non-trade Floor Plan Notes Payable Non Trade, New, Gross Floor Plan Notes Payable Non Trade, New, Gross Number of collision centers, sold (in collision centers) Number of Collision Centers, Sold Number of Collision Centers, Sold Notional principal amount of derivative liability Derivative Liability, Notional Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Employee Retirement Plan, Groups of Participants [Domain] Employee Retirement Plan, Groups of Participants [Domain] [Domain] for Employee Retirement Plan, Groups of Participants [Axis] Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Entity Voluntary Filers Entity Voluntary Filers Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Total Deferred Income Tax Expense Deferred Income Tax Expense (Benefit) PROPERTY AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] Performance share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Schedule of Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Components of Inventory [Line Items] Components of Inventory [Line Items] Components of Inventory [Line Items] Recurring Fair Value, Recurring [Member] 12 months or longer, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Asset impairments Asset impairments Asset Impairment Charges Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group, Current Carrying Value of Collateralized Related Real Estate Total carrying value Long-Term Debt Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Operating lease right-of-use assets Disposal Group, Including Discontinued Operation, Operating Lease ROU Assets Disposal Group, Including Discontinued Operation, Operating Lease ROU Assets Thereafter Long-Term Debt, Maturity, after Year Five Liabilities associated with assets held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Employer matching contribution after one year of employment, percent Defined Contribution Plan, Employer Matching Contribution, Percent of Match Total accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Age 50 or More Age Fifty or More [Member] Age Fifty or More [Member] Restricted investments, fair value Restricted Investments, Fair Value Restricted Investments, Fair Value Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Interest Rate swap Due February 2025 Interest Rate swap Due February 2025 [Member] Interest Rate swap Due February 2025 Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [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 Document Annual Report Document Annual Report 2027 Finance Lease, Liability, to be Paid, Year Three Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Beginning balance Ending balance Indefinite-Lived Intangible Assets (Excluding Goodwill) Assumed contract liabilities Contract with Customer, Liability Accounting Policies [Abstract] Accounting Policies [Abstract] REVENUE: Revenues [Abstract] Borrowing availability Letters Of Credit, Borrowing Availability Letters Of Credit, Borrowing Availability Current Fiscal Year End Date Current Fiscal Year End Date Less: Amount of lease payments representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Short-term investments Short-Term Investments PEO Name PEO Name Vesting [Axis] Vesting [Axis] Award Type [Domain] Award Type [Domain] Interest Rate swap Due December 2031 Interest Rate swap Due 12/2031 [Member] Interest Rate swap Due 12/2031 Issuance of common stock in connection with share-based payment arrangements (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Loaner vehicles Other Assets, Current, Service Loaner Vehicles Other Assets, Current, Service Loaner Vehicles Schedule of Goodwill and Intangibles Schedule of Intangible Assets and Goodwill [Table Text Block] Non-PEO NEO Non-PEO NEO [Member] Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Total Investments, at fair value Investments, Fair Value Disclosure Additional Paid-in Capital Additional Paid-in Capital [Member] Liabilities, Non-Current, Finance Long-term lease obligation (b) Finance Lease, Liability, Noncurrent Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Deferred revenue Increase (Decrease) in Contract with Customer, Asset 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 Notes Payable Notes Payable 2015 Wells Fargo Master Loan Facility 2015 Wells Fargo Master Loan Facility [Member] 2015 Wells Fargo Master Loan Facility [Member] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Purchase of treasury stock Purchases of Treasury Stock Purchases of Treasury Stock 2028 Finance Lease, Liability, to be Paid, Year Four Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Series of Individually Immaterial Business Acquisitions Series of Individually Immaterial Business Acquisitions [Member] Proceeds from the sale of debt securities—available-for-sale Proceeds from Sale of Debt Securities, Available-for-Sale Ford Motor Company (Ford and Lincoln) Ford Motor Company (Ford and Lincoln) [Member] Ford Motor Company (Ford and Lincoln) [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] New Vehicle and Used Vehicle Floor Plan New Vehicle and Used Vehicle Floor Plan [Member] New Vehicle and Used Vehicle Floor Plan [Member] Share-based compensation Share-Based Payment Arrangement, Noncash Expense Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Repayments of borrowings Repayments of Secured Debt Inventories Disposal Group, Including Discontinued Operation, Inventory Stated interest rate of debt instrument Stated interest rate of debt instrument Debt Instrument, Interest Rate, Stated Percentage Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] 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 Total other expenses (income), net Nonoperating Income (Expense) Compensation Related Costs [Abstract] Compensation Related Costs [Abstract] Accrued finance and insurance chargebacks Accrued Finance and Insurance Chargebacks, Current Accrued Finance and Insurance Chargebacks, Current Real Estate Not Currently Used in Operations Real Estate Not Currently Used in Operations [Member] Real Estate Not Currently Used in Operations [Member] Number of collision repair centers (in collision repair centers) Number of Collision Repair Centers Number of Collision Repair Centers Derivative, Number of Instruments Held Derivative, Number of Instruments Held Auditor Firm ID Auditor Firm ID Income tax provision Effective Income Tax Rate Reconciliation, Percent INCOME FROM OPERATIONS INCOME FROM OPERATIONS Operating Income (Loss) Variable Rate [Domain] Variable Rate [Domain] Number of reportable segments Number of Reportable Segments Total liabilities and shareholders' equity Liabilities and Equity Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting Policies [Line Items] SUBSEQUENT EVENTS Subsequent Events [Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Deferred sales commissions Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost Schedule of Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] 2026 Finance Lease, Liability, to be Paid, Year Two Current maturities of long-term debt Less—current portion, net of debt issuance costs Long-Term Debt and Lease Obligation, Current Schedule of Restricted Stock Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Asset, Held-for-Sale [Table] Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Underlying Security Market Price Change Underlying Security Market Price Change, Percent New vehicles New Vehicles [Member] New Vehicles Individual: Individual [Axis] Buildings and improvements Buildings and leasehold improvements Building and Building Improvements [Member] Repurchase of common stock associated with net share settlements of employee share-based awards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Inventories, net Total inventories Inventory, Net Total liabilities associated with assets held for sale Disposal Group, Including Discontinued Operation, Liabilities Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] Unrealized gains (losses) on available-for-sale debt securities, tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Schedule of Components of Inventory [Table] Schedule of Components of Inventory [Table] Schedule of Components of Inventory [Table] OPERATING EXPENSES: Operating Expenses [Abstract] 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. Schedule of Estimated Useful Lives Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Aggregate purchase price Business Combination, Consideration Transferred Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] Reclassified to assets held for sale Goodwill, Reclassified To Assets Held-for-sale Goodwill, Reclassified To Assets Held-for-sale Contract Assets (long-term), December 31, 2024 Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Minimum Minimum [Member] 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 Adoption Date Trading Arrangement Adoption Date OTHER EXPENSES (INCOME): Other Expenses [Abstract] DEFERRED REVENUE Contract with Customer, Liability, Noncurrent Due in 6-10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Segments [Axis] Segments [Axis] 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] Pro forma revenue Business Acquisition, Pro Forma Revenue Income tax provision at the statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Derivative Instrument [Axis] Derivative Instrument [Axis] Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Long-term debt, gross Long-Term Debt, Gross Exercise Price Award Exercise Price Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Other interest expense, net Other interest expense, net Interest Expense, Other Federal Funds Federal Funds [Member] Federal Funds [Member] Arrangement Duration Trading Arrangement Duration 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] LEASES Lessee, Finance Leases [Text Block] GOODWILL AND INTANGIBLE FRANCHISE RIGHTS Goodwill and Intangible Assets Disclosure [Text Block] SHAREHOLDERS' EQUITY: Equity, Attributable to Parent [Abstract] Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Investments Investments Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Finance lease liability Present value of future minimum lease payments Finance Lease, Liability All Individuals All Individuals [Member] Variable Rate [Axis] Variable Rate [Axis] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Schedule of Unrealized Loss on Investments Schedule of Unrealized Loss on Investments [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] General Motors Company (Chevrolet, Buick and GMC) General Motors Company Chevrolet, Buick and GMC [Member] General Motors Company Chevrolet, Buick and GMC Receivables [Abstract] Receivables [Abstract] 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. Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Lender Name [Axis] Lender Name [Axis] 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 Current maturities of operating leases Disposal Group, Including Discontinued Operation, Operating Leases, Current Maturities Disposal Group, Including Discontinued Operation, Operating Leases, Current Maturities Used Vehicle Floor Plan Facility Used Vehicle Floor Plan Facility [Member] Used Vehicle Floor Plan Facility [Member] Number of new vehicle dealerships acquired (in new vehicle dealerships) Number of New Vehicle Dealerships Acquired Number of New Vehicle Dealerships Acquired Accounts payable and accrued liabilities Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Add: unamortized premium Unamortized premium Debt Instrument, Unamortized Premium Loaner vehicle amortization Cost, Depreciation and Amortization 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 Mortgages Mortgages [Member] Additional amount available for conversion Letters Of credit, Additional Amount Available For Conversion Letters Of credit, Additional Amount Available For Conversion Total liabilities assumed Acquisition related liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities DEFERRED INCOME TAXES Deferred Income Tax Liabilities, Net Unrealized (gain) loss on investments Unrealized Gain (Loss) on Investments Interest Expense Interest Expense [Member] Purchases of previously leased real estate Payments to Acquire Previously Leased Real Estate Payments to Acquire Previously Leased Real Estate Other current assets Increase (Decrease) in Other Operating Assets Federal Deferred Federal Income Tax Expense (Benefit) Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Asset impairments Asset impairments Impairment of Intangible Assets, Finite-Lived COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Measure: Measure [Axis] Unearned premiums Unearned Premiums Income tax benefit (expense) associated with other comprehensive income items Results Recognized in AOCI (Effective Portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Asset Class [Domain] Asset Class [Domain] Investments [Abstract] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Number of dealership locations (in dealership locations) Number Of Dealership Locations Number Of Dealership Locations Entity Emerging Growth Company Entity Emerging Growth Company Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] 2029 Long-Term Debt, Maturity, Year Five Guarantee Obligations Guarantee Obligations [Member] Base Rate Component, SOFR Base Rate Component, SOFR [Member] Base Rate Component, SOFR Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Franchises to be acquired Business Combination, Franchises To Be Acquired Business Combination, Franchises To Be Acquired Schedule of Accounts Payable and Accrued Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Finance lease Assets, Finance Finance Lease, Right-of-Use Asset, after Accumulated Amortization Equity Component [Domain] Equity Component [Domain] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Standby Letters of Credit Standby Letters of Credit [Member] Statement [Table] Statement [Table] Measurement Frequency [Domain] Measurement Frequency [Domain] Consolidation Items [Domain] Consolidation Items [Domain] Interest payments made including amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Gross property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Level 1 Fair Value, Inputs, Level 1 [Member] Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Senior Notes Senior Notes [Member] 2027 Long-Term Debt, Maturity, Year Three 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 Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] 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 Intangible franchise rights Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 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 Due in 6-10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer INCOME TAXES Income Tax Disclosure [Text Block] Retirement of common stock Repurchase or retirement of previously repurchased common stock Stock Repurchased and Retired During Period, Value Less: current obligations under leases Operating Lease, Liability, Including Held-For-Sale, Current Operating Lease, Liability, Including Held-For-Sale, Current 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Non-deductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Total current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Number of collision centers acquired (in collision centers) Number of Collision Centers Acquired Number of Collision Centers Acquired Number of franchises (in franchises) Number of Franchises Number of Franchises Treasury stock, shares, retired (in shares) Treasury Stock, Shares, Retired Mercedes-Benz USA, LLC (Mercedes-Benz and Sprinter) 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 Weighted Average Discount Rate - Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Number of vehicle brands (in vehicle brands) Number of Vehicle Brands Number of Vehicle Brands Credit Facility [Axis] Credit Facility [Axis] Revenues by major brand, percentage Entity-Wide Revenues, Major Brand, Percentage Entity-Wide Revenues, Major Brand, Percentage Total fair value Long-Term Debt, Fair Value Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Entity Registrant Name Entity Registrant Name Payments to acquire businesses, gross Payments to Acquire Businesses, Gross Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Depreciation and amortization Depreciation, Depletion and Amortization Goodwill to be acquired Business Combination, Goodwill To Be Acquired Business Combination, Goodwill To Be Acquired GROSS PROFIT Gross Profit State Deferred State and Local Income Tax Expense (Benefit) Fair Value as of Grant Date Award Grant Date Fair Value Level 2 Fair Value, Inputs, Level 2 [Member] Geographical [Domain] Geographical [Domain] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Franchise rights Disposal Group, Including Discontinued Operation, Intangible Assets Consolidation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Parts And Service Parts And Service [Member] Parts And Service Common stock, $.01 par value, 90,000,000 shares authorized; 41,649,426 and 42,352,001 shares issued, including shares held in treasury, respectively Common Stock, Value, Issued Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Operating cash flows from finance lease Finance Lease, Interest Payment on Liability Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] F&I chargeback liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves Intangible assets acquired Acquisitions - measurement-period adjustments Indefinite-Lived Intangible Assets Acquired State income tax expense, net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 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 Other, net Deferred Tax Assets, Other Indefinite-lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] CASH FLOW FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued State income tax expense, net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Total deferred income tax liabilities Deferred Tax Liabilities, Gross Net income (in dollars per share) Earnings Per Share, Basic Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Operating cash flows from operating leases Operating Lease, Payments Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] 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 Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Goodwill [Table] Goodwill [Table] 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 Held-for-sale Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Total current liabilities Liabilities, Current OTHER LONG-TERM LIABILITIES Other Liabilities Disclosure [Text Block] Business and Credit Concentration Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] FLOOR PLAN NOTES PAYABLE—NON-TRADE Floor Plan Notes Payable Non-Trade [Text Block] Floor Plan Notes Payable Non-Trade [Text Block] Aggregate commitments Long-Term Line of Credit Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Number of real estate properties Number of Real Estate Properties Accrued finance and insurance chargebacks Accrued Finance and Insurance Chargebacks, Noncurrent Accrued Finance and Insurance Chargebacks, Noncurrent Acquisitions Business Combinations Policy [Policy Text Block] Schedule of Other Long-Term Liabilities Schedule of Other Long-Term Liabilities [Table Text Block] Schedule of Other Long-Term Liabilities [Table Text Block] Revenues Revenues 2019 Plan 2019 Equity and Incentive Compensation Plan [Member] 2019 Equity and Incentive Compensation Plan [Member] Entity Address, City or Town Entity Address, City or Town Senior Credit Facility Senior Credit Facility [Member] Senior Credit Facility [Member] Share-based compensation expense Share-Based Payment Arrangement, Expense Investments, Debt and Equity Securities [Abstract] 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 Employer matching contributions Defined Contribution Plan, Employer Discretionary Contribution 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 Loss Contingencies [Table] Loss Contingencies [Table] Business Acquisition [Axis] Business Acquisition [Axis] 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"). 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] Finance Lease, Liability, Payment, Due [Abstract] Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] 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 REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Total by maturity Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Share issues (repurchases) Treasury Stock, Value, Acquired, Cost Method Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Vehicle receivables Vehicle Receivables [Member] Vehicle Receivables [Member] Other Other Accrued Liabilities, Current Document Period End Date Document Period End Date Liabilities, Current, Finance Less: current obligations under leases (a) Finance Lease, Liability, Current Interest Rate swap Due May 2031 Interest Rate swap Due 5/2031 [Member] Interest Rate swap Due 5/2031 Base Rate Base Rate [Member] Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid 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 Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Asset Class [Axis] Asset Class [Axis] Insider Trading Arrangements [Line Items] Other current assets Other Current Assets [Member] 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) 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three Available-for-Sale, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Schedule of Business Acquisitions Schedule of Business Acquisitions, by Acquisition [Table Text Block] Document Transition Report Document Transition Report Operating Lease, Liability Held-for-Sale, Noncurrent Operating Lease, Liability Held-for-Sale, Noncurrent Operating Lease, Liability Held-for-Sale, Noncurrent Net assets held for sale Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group Vehicle Repair and Maintenance Services Vehicle Repair and Maintenance Services [Member] Vehicle repair and maintenance services [Member] Restricted payments capacity, percent of net income Restricted Payments Capacity, Percent Of Net Income Restricted Payments Capacity, Percent Of Net Income Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] 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 Executive Category: Executive Category [Axis] Schedule of Components of Income Tax Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Purchases of debt securities—available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Company Selected Measure Name Company Selected Measure Name