Used Vehicles Used Vehicles [Member] Used Vehicles [Member] BASIS OF PRESENTATION AND CONSOLIDATION AND ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Total contracts-in-transit and vehicle receivables Contracts In Transit And Vehicle Receivables, Gross Contracts In Transit And Vehicle Receivables, Gross Statistical Measurement [Domain] Statistical Measurement [Domain] Award Timing Predetermined Award Timing Predetermined [Flag] 2026 Business Acquisitions 2026 Business Acquisitions [Member] 2026 Business Acquisitions U.K. Notes U.K. Notes [Member] U.K. Notes [Member] Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Interest Rate Swaps Interest Rate Swap [Member] Variable consideration recognized Contract with Customer, Performance Obligation Satisfied in Previous Period Treasury stock Treasury Stock, Number of Shares and Restriction Disclosures [Abstract] Tabular List, Table Tabular List [Table Text Block] BASIC EARNINGS PER SHARE: Earnings Per Share, Basic [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Operating Activities [Axis] Operating Activities [Axis] Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Total contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Type of Restructuring [Domain] Type of Restructuring [Domain] Vehicle receivables Vehicle Receivables, Gross Vehicle Receivables, Gross Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Basic earnings per share (in dollars per share) Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Schedule of Floorplan Notes Payable Schedule of Line of Credit Facilities [Table Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities U.S. Notes U.S. Notes [Member] U.S. Notes [Member] REVENUES Revenue from Contract with Customer [Text Block] Net issuance of treasury shares to stock compensation plans Stock Issued During Period, Value, Employee Stock Purchase Plan, Net Stock Issued During Period, Value, Employee Stock Purchase Plan, Net Schedule of Reportable Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Borrowings on credit facility — acquisition line Borrowings On Credit Facility Acquisition Line Borrowings on credit facility acquisition line. Diluted earnings per share discontinued operations (in dollar per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Used vehicle retail sales Used vehicle retail sales Used Vehicles - Retail [Member] Used Vehicles - Retail [Member] Revolving Credit Facility — floorplan notes payable, net Floorplan Notes Payable [Member] Floorplan Notes Payable [Member] Continuing Operations Continuing Operations [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Offset account related to floorplan notes payable Floorplan Offset Floorplan offset. Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Accrual for capital expenditures Accrued Capital Expenditures Accrued Capital Expenditures FMCC offset FMCC Offset FMCC Offset Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Floorplan notes payable — manufacturer affiliates (Increase) Decrease Floor Plan Notes The decrease (increase) during the reporting period in the carrying value of revolving financing agreements related to new vehicle inventories with captive finance companies associated with the manufacturer of those vehicles that are due when the vehicles are sold. Asset impairments Asset Impairment Charges Dividends declared Dividends, Common Stock, Cash Tax (benefit) provision of unrealized (loss) gain arising during the period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax TOTAL STOCKHOLDERS’ EQUITY Beginning balance Ending balance Equity, Attributable to Parent Other comprehensive income (loss), net of taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Shares authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Intangible franchise rights Indefinite-Lived Franchise Rights CURRENT ASSETS: Assets, Current [Abstract] TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Antidilutive Securities Excluded from Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Interest rate (as a percentage) Line of Credit Facility, Interest Rate at Period End Reclassification related to de-designated interest rate swaps, net of tax provision of $(0.2) and $—, respectively Other Comprehensive Income (Loss), Reclassification Of Cash Flow Hedge, Gain (Loss), After Reclassification And Tax Other Comprehensive Income (Loss), Reclassification Of Cash Flow Hedge, Gain (Loss), After Reclassification And Tax LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Interest Rate Swaps Interest Rate Swap I [Member] Interest Rate Swaps Forward Starting [Member] New Vehicles New Vehicles [Member] New Vehicles [Member] Depreciation and amortization expense Depreciation, Depletion and Amortization, Continuing Operations Depreciation, Depletion and Amortization, Continuing Operations Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument Debt Instrument [Line Items] Treasury Stock Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Total debt Debt, Long-Term and Short-Term, Combined Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction INCOME BEFORE INCOME TAXES Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Carrying Value and Fair Value of The Company’s Fixed Rate Long-term Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Other long-term liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Other interest expense, net Other Interest Expense [Member] Other interest expense. Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Unrealized gain (loss) arising during the period, net of tax (provision) benefit of $(0.9) and $1.5, respectively Amount of Unrealized Income (Loss), Net of Tax, Recognized in Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Participating financial institutions (institution) Participating Financial Institution Participating Financial Institution Line of Credit Facility [Table] Line of Credit Facility [Table] Net unrealized gain (loss) on interest rate risk management activities, net of tax: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Restructuring reserve Beginning balance Ending balance Restructuring Reserve Net income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Line of Credit Facility [Abstract] Line of Credit Facility [Abstract] Current operating lease liabilities Operating Lease, Liability, Current Deferred income taxes Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Net income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Less: allowance for doubtful accounts Contracts In Transit And Vehicle Receivables, Allowance For Doubtful Accounts Contracts In Transit And Vehicle Receivables, Allowance For Doubtful Accounts Award Timing Method Award Timing Method [Text Block] Basic earnings per share continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Award Type Award Type [Axis] Accumulated Income (Loss) On Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Long-term debt Long-Term Debt TOTAL ASSETS Total assets Assets Gain (loss) on interest rate derivative instruments not designated as hedging instruments Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments 2025 Business Acquisitions 2025 Business Acquisitions [Member] 2025 Business Acquisitions Ticker symbol(s) Trading Symbol Other comprehensive income (loss) before reclassifications: Other Comprehensive Income (Loss), Before Reclassification [Abstract] Other Comprehensive Income (Loss), Before Reclassification [Abstract] Net pre-tax gain (loss) on dealership dispositions Net Gain (Loss) on Real Estate and Dealership Transactions Net Gain (Loss) on Real Estate and Dealership Transactions Entity Address, City or Town Entity Address, City or Town CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Proceeds from employee stock purchase plan Net Issuance Of Common And Treasury Shares To Employee Stock Compensation Plans The aggregate value of common shares issued during the period to fund employee benefit plan. Other segment items Segment Reporting, Other Segment Item, Amount Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Real estate related Real estate related Real Estate Related [Member] Real Estate Related [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Toyota Dealerships Toyota Dealerships [Member] Toyota Dealerships Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Sub-limit for letters of credit Line Of Credit Facility, Sub-limit Line Of Credit Facility, Sub-limit Aggregate consideration paid for dealerships Business Combination, Consideration Transferred Other Other Receivable [Member] Other receivable. Entity Emerging Growth Company Entity Emerging Growth Company Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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] Restructuring Reserve Restructuring Reserve [Roll Forward] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Allowance for doubtful accounts Contract with Customer, Asset, Allowance for Credit Loss Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding PEO PEO [Member] RECEIVABLES, NET AND CONTRACT ASSETS Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Revenues Disaggregated by Revenue Source and Geographical Segment Disaggregation of Revenue [Table Text Block] Employee related costs Employee Severance [Member] Changes in assets and liabilities, net of acquisitions and dispositions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Retained Earnings Retained Earnings [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Total assets Derivative Asset Provision for income taxes Income Tax Expense (Benefit) Facility closure costs Facility Closing [Member] Pre-tax OCI, before Reclassifications, before Tax, Attributable to Parent Basis spread on variable rate (as a percentage) Debt Instrument, Basis Spread on Variable Rate Basic earnings per share discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Other interest expense, net (pre-tax) Interest Expense [Member] Reclassification of de-designated interest rate swaps net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Product and Service [Domain] Product and Service [Domain] Hedging Relationship [Axis] Hedging Relationship [Axis] Unrealized loss on interest rate risk management activities, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Contracts-in-transit and vehicle receivables Increase Decrease In Contracts In Transit And Vehicle Receivables The increase (decrease) during the reporting period in the book value of amounts due from financing institutions on retail finance contracts from vehicle sales and dealer incentives due from manufacturers. Also, included are amounts receivable from vehicle wholesale sales. Diluted earnings per share continuing operations (in dollar per share) Income (Loss) from Continuing Operations, Per Diluted Share Prime Rate Prime Rate [Member] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Held-for-sale Discontinued Operations, Held-for-Sale [Member] Business Combination [Table] Business Combination [Table] Notional value Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Change in operating lease assets Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization City Area Code City Area Code ACQUISITIONS AND DISPOSITIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Cash paid for acquisitions, net Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses and other current liabilities Accrued Liabilities, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] GM Facility, net GM Financial Facility [Member] GM Financial Facility Member CASH FLOWS FROM INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Number of tranches (tranche) Number Of Tranches Number Of Tranches Property and equipment, net Long-Lived Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Schedule of Segment Reporting Information, by Segment Revenues from External Customers and Long-Lived Assets [Line Items] Subsequent Event Subsequent Event [Member] Other non-manufacturer facilities Other Non-Manufacturer Affiliate Facilities [Member] Other Non-Manufacturer Affiliate Facilities [Member] Cash Flow Hedging Cash Flow Hedging [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Floorplan interest expense Floor Plan Interest Expense Interest expense incurred on borrowings under the floorplan line of the credit facility and arrangements with vehicle manufacturer affiliates for the financing of specific new, used and rental vehicle inventory. Interest expense also includes the net impact of interest rate swap settlements during the period, which are designed to hedge exposure to variable interest rates. PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Equity Components [Axis] Equity Components [Axis] Rental Vehicles Financed through Credit Facility Rental Vehicle Credit Facility [Member] Rental vehicle credit facility. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Unamortized discount Debt Instrument, Unamortized Discount (Premium), Net Restructuring Cost Restructuring Cost and Reserve [Line Items] Other Performance Measure, Amount Other Performance Measure, Amount Debt issuance costs Payments of Debt Issuance Costs Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Entity Address, State or Province Entity Address, State or Province Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Line of credit facility, potential maximum borrowing capacity Line of Credit Facility, Potential Maximum Borrowing Capacity Line of Credit Facility, Potential Maximum Borrowing Capacity Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] TOTAL CURRENT LIABILITIES Liabilities, Current Total other debt Other Long-Term Debt And Finance Lease, Liability Other Long-Term Debt And Finance Lease, Liability Derivative Instrument [Axis] Derivative Instrument [Axis] Cumulative restructuring cost incurred Restructuring and Related Cost, Cost Incurred to Date Individual: Individual [Axis] Net issuance of treasury shares to stock compensation plans (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans, Net Stock Issued During Period, Shares, Employee Stock Purchase Plans, Net Finance, insurance and other, net Financial Service [Member] Dividends paid Payments of Ordinary Dividends, Common Stock Other current assets Other Assets, Current Additional paid-in capital Additional Paid in Capital, Common Stock Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Other long-term assets Derivative Asset, Noncurrent Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Accounts and notes receivable, net: Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] Carrying Value Reported Value Measurement [Member] Lexus Dealership Lexus Dealership [Member] Lexus Dealership Equity [Abstract] Equity [Abstract] Number of franchises Number of Franchises Number of Franchises Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current maturities of long-term debt Long-Term Debt and Lease Obligation, Current Manufacturer receivables Amounts Due From Manufacturers [Member] Amounts due from manufacturers. Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Current Increase (Decrease) in Stockholders' Equity Increase (Decrease) in AOCI Increase (Decrease) in Stockholders' Equity [Roll Forward] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] New vehicle retail sales New vehicle retail sales New Vehicles - Retail [Member] New Vehicles - Retail [Member] Selling, general and administrative expenses SG&A expenses Selling, General and Administrative Expense Purchases of treasury stock, including excise tax Stock Repurchased During Period, Value Schedule of Changes in the Balances of Each Component of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Other long-term assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Settlement price from disposition of franchise property and equipment Settlement Price From Disposition Of Franchise Property And Equipment Settlement Price From Disposition Of Franchise Property And Equipment Diluted: Earnings Per Share, Diluted, Two Class Method [Abstract] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] 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] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Finance leases Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Total accounts and notes receivable Accounts Receivable, before Allowance for Credit Loss, Current Subsequent Event Type [Axis] Subsequent Event Type [Axis] ASSETS Assets: Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Preferred stock Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Business Combination Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] STOCKHOLDERS’ EQUITY: Equity, Attributable to Parent [Abstract] 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] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Amount of gain expected to be reclassified from other comprehensive income (loss) into earnings Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Gain (loss) on interest rate derivative instruments not designated as hedging instruments, net of tax Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Net of Tax Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Net of Tax Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Interest rate (as a percentage) Debt Instrument, Interest Rate, Stated Percentage Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Floorplan interest expense Floorplan interest expense (pre-tax) Floorplan Interest Expense [Member] Floorplan interest expense. Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Repayments on credit facility — floorplan line and other Repayments On Credit Facility Floorplan Line The cash outflow resulting from repayments of borrowings under the floorplan line of the revolving credit facility. Borrowings under the floorplan line are used to finance the purchase of specific new, used and rental vehicle inventory. Fair Value as of Grant Date Award Grant Date Fair Value Tax provision of reclassification adjustment Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Other interest expense, net Interest Expense, Other Schedule of Composition of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Dilutive effect of stock-based awards and employee stock purchases (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Document Quarterly Report Document Quarterly Report Debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Inventories Increase (Decrease) in Retail Related Inventories Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Floorplan Line Revolving Credit Facility, Floorplan Line [Member] Revolving Credit Facility, Floorplan Line [Member] Non-PEO NEO Non-PEO NEO [Member] Outstanding letters of credit Letters of Credit Outstanding, Amount Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Schedule of Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Other Debt Other Debt [Member] Other Debt Acquisition Line Revolving Credit Facility, Acquisition Line [Member] Revolving Credit Facility, Acquisition Line [Member] Asset impairments Asset Impairment Charges Continued Operations Asset Impairment Charges Continued Operations Proceeds from disposition of franchises, property and equipment Proceeds From Disposition Of Franchise Property And Equipment Cash inflow from the sale of long-lived physical assets, dealership franchises, and related real estate, as applicable. Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Contracts-in-transit and vehicle receivables, net Total contracts-in-transit and vehicle receivables, net Contracts In Transit And Vehicle Receivables, Net Amounts due from financing institutions on retail finance contracts from vehicle sales and dealer incentives due from manufacturers. Also, included are amounts receivable from vehicle wholesale sales. Name Trading Arrangement, Individual Name All Award Types Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Other Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] 2024 Restructuring Plan 2024 Restructuring Plan [Member] 2024 Restructuring Plan Disaggregation of Revenue Disaggregation of Revenue [Line Items] Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Accounts and notes receivable Increase (Decrease) in Accounts and Other Receivables Compensation Amount Outstanding Recovery Compensation Amount Debt issued Debt Instrument, Face Amount Real estate related capital expenditures Capital Expenditures, Real Estate Capital Expenditures, Real Estate Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Cash payments Cash payments Payments for Restructuring Restructuring Type [Axis] Restructuring Type [Axis] WEIGHTED AVERAGE COMMON SHARES OUTSTANDING: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt Total long-term debt Long-Term Debt and Lease Obligation FMCC Facility, net FMCC Facility [Member] FMCC facility. Long-term debt, offset Long-Term Debt, Offset Long-Term Debt, Offset Tax effect Other Comprehensive Income (Loss) before Reclassifications, Tax Segments [Domain] Segments [Domain] Schedule of Impact of Interest Rate Derivative Instruments Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other manufacturer affiliate facilities Other Manufacturer Affiliate Facilities [Member] Other Manufacturer Affiliate Facilities [Member] Reclassification adjustment for gain included in interest expense, net of tax provision of $(1.1), and $(1.6), respectively Amount Reclassified from Other Comprehensive Income (Loss) into Statements of Operations Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Basic: Earnings Per Share, Basic, Two Class Method [Abstract] Inventories Inventory, Net Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Minimum Minimum [Member] Accounts, Notes, Loans and Financing Receivable Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Senior Notes Senior Notes [Member] DEBT Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Discontinued operations Discontinued Operations [Member] Net income available to diluted common shares Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Common stock, $0.01 par value, 50,000,000 shares authorized; 24,931,436 and 24,941,249 shares issued, respectively Common Stock, Value, Issued Less: Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Restructuring Plan [Domain] Restructuring Plan [Domain] Used vehicle wholesale sales Used vehicle wholesale sales Used Vehicles - Wholesale [Member] Used Vehicles - Wholesale [Member] Operating Activities [Domain] Operating Activities [Domain] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Weighted average common shares outstanding diluted (in shares) Weighted average dilutive common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Information Segment Reporting, Policy [Policy Text Block] Commitments and Contingencies (Note 12) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Business Combination [Axis] Business Combination [Axis] Borrowings on credit facility — floorplan line and other Borrowings On Credit Facility Floorplan Line The cash inflow resulting from borrowings under the floorplan line of the revolving credit facility. Borrowings under the floorplan line are used to finance the purchase of specific new, used and rental vehicle inventory. Entity Small Business Entity Small Business Escrow payments for acquisitions Escrow Payments For Acquisitions Escrow Payments For Acquisitions Real estate related and other long-term debt Real estate related debt Other Long-Term Debt Parts and service sales Parts And Service [Member] Parts And Service [Member] Document Transition Report Document Transition Report Repayments on credit facility — acquisition line Repayments On Credit Facility Acquisition Line Repayments on credit facility acquisition line. Amount reclassified from accumulated other comprehensive income (loss): Reclassification from AOCI, Current Period [Abstract] Reclassification from AOCI, Current Period [Abstract] Underlying Securities Award Underlying Securities Amount Principal payments on other debt Repayments of Other Long-Term Debt Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount DILUTED EARNINGS PER SHARE: Earnings Per Share, Diluted [Abstract] Less: allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Total new and used vehicle sales New And Used Vehicles [Member] New And Used Vehicles [Member] Operating lease liabilities Increase (Decrease) in Operating Lease Liability Document Type Document Type EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Number of instruments Derivative, Number of Instruments Held Derivative Contract [Domain] Derivative Contract [Domain] Total revenues Total revenues Total revenues Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Contract termination costs Contract Termination [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Adjustments Restructuring Reserve, Accrual Adjustment Unrealized (gain) loss on derivative instruments Unrealized (loss) gain on derivative instruments Unrealized Gain (Loss) on Derivatives TOTAL CURRENT ASSETS Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Weighted average interest rate (as a percentage) Debt, Weighted Average Interest Rate Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Payments of tax withholding for stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income available to basic common shares Net Income (Loss) Available to Common Stockholders, Basic Schedule of Asset and Liabilities Recorded at Fair Value Schedule of Derivative Instruments [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX Other comprehensive income (loss), net of taxes Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent CURRENT LIABILITIES: Liabilities, Current [Abstract] Line of Credit Facility Line of Credit Facility [Line Items] Weighted average interest rate (as a percentage) Derivative, Average Fixed Interest Rate Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] U.K. U.K. United Kingdom Segment [Member] United Kingdom Segment [Member] Floorplan notes payable — credit facility and other, net Floorplan Notes Payable and Other [Member] Floorplan Notes Payable and Other [Member] Acquisition Line Acquisition line Outstanding balance Long-Term Line of Credit Gain on disposition of assets Gain (Loss) on Disposition of Assets Diluted earnings per common share (in dollars per share) Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Number of dealerships Number Of Dealerships Number of dealerships. Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of each class Title of 12(b) Security 4.00% Senior Notes 4.00% Senior Notes [Member] 4.00% Senior Notes [Member] Treasury stock (in shares) Treasury Stock, Common, Shares Earnings Per Share [Abstract] Earnings Per Share [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Volkswagen Dealerships Volkswagen Dealerships [Member] Volkswagen Dealerships GROSS PROFIT Gross Profit Dispositions reduced goodwill Goodwill, Written off Related to Sale of Business Unit Deferred revenues Increase (Decrease) in Contract with Customer, Liability Less: current maturities Long Term Debt And Capital Lease Obligations Excluding Short Term Financing Current Long term debt and capital lease obligations excluding short term financing current. Number of dealerships acquired Number Of Dealerships Acquired Number of dealerships acquired. Lessee rental payment obligations during remaining terms of leases under guarantee agreement Guarantor Obligations, Maximum Exposure Inestimable, Minimum Lease Payments Guaranteed Guarantor Obligations, Maximum Exposure Inestimable, Minimum Lease Payments Guaranteed Cash paid for taxes, net of refunds Income Taxes Paid, Net Award Timing Disclosures [Line Items] Less: Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Current assets classified as held for sale Disposal Group, Including Discontinued Operation, Assets, Current Long-term debt, gross Long-Term Debt, Gross F&I receivables Finance And Insurance Receivables Net [Member] Finance and insurance receivables net. 6.375% Senior Notes 6.375% Senior Notes [Member] 6.375% Senior Notes Borrowings on other debt Proceeds from Issuance of Other Long-Term Debt Property and equipment, net of accumulated depreciation of $763.7 and $746.3, respectively Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization NET INCOME NET INCOME Net income Net income Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Segment Reporting Information Segment Reporting Information [Line Items] Restructuring charges Restructuring Charges Repurchases of common stock, amounts based on settlement date Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Restructuring Cost [Table] Restructuring Cost [Table] Schedule of Segment Reporting, by Segment, Goodwill and Intangible Assets Schedule of Segment Reporting, by Segment, Goodwill and Intangible Assets [Table Text Block] Schedule of Segment Reporting, by Segment, Goodwill and Intangible Assets [Table Text Block] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Derivative Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] INCOME FROM OPERATIONS Operating Income (Loss) Floorplan notes payable — manufacturer affiliates, net Floorplan Notes Payable, Manufacturer Affiliates [Member] Floorplan Notes Payable, Manufacturer Affiliates [Member] Line of Credit Line of Credit [Member] Asset impairments Asset Impairments [Member] Asset Impairments Retained earnings Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Accumulated Income (Loss) On Interest Rate Swaps Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] Current liabilities classified as held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Schedule of Accounts and Notes Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Other income Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Variable Rate [Domain] Variable Rate [Domain] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Floorplan notes payable — credit facility and other, net of offset account of $149.1 and $504.2, respectively Floorplan Notes Payable Credit Facility Gross Floorplan Notes Payable Credit Facility Gross Treasury stock, at cost; 13,030,825 and 12,897,840 shares, respectively Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Total capital expenditures Capital Expenditures Capital Expenditures Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Receivable Type [Domain] Receivable [Domain] Weighted average common shares outstanding basic (in shares) Weighted average basic common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] Total cost of sales Cost of sales Cost of Product and Service Sold Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of Calculation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Systems integration costs System Integration Costs [Member] System Integration Costs Non-real estate related capital expenditures Capital Expenditures, Non Real Estate Related Capital Expenditures, Non Real Estate Related Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Provision for income taxes Reclassification from AOCI, Current Period, Tax Contracts-in-transit Contracts In Transit, Gross Contracts In Transit, Gross Pre-tax Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Other Credit Facilities Other Credit Facilities [Member] Other Credit Facilities [Member] Less: unamortized debt issuance costs Debt Instrument, Unamortized Discount FLOORPLAN NOTES PAYABLE Credit Facilities [Text Block] Credit facilities Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Floorplan notes payable — manufacturer affiliates, net of offset account of $0.6 and $—, respectively Floorplan Notes Payable Manufacturer Affiliates Amounts payable for the financing of specific new vehicle inventory with Ford Motor Credit Company, the financing of new and used vehicle inventory in the United Kingdom with BMW Financial Services and the financing of rental vehicle inventory with several other manufacturers. Payments on floor plan notes payable are generally due as the vehicles are sold. Par value (in dollars per share) Common Stock, Par or Stated Value Per Share Shares issued (in shares) Common Stock, Shares, Issued Use of Estimates Use of Estimates, Policy [Policy Text Block] Interest Expense, Other Interest Expense, Other [Member] Interest Expense, Other Trading Arrangement: Trading Arrangement [Axis] Other current assets Derivative Asset, Current Total Shareholder Return Amount Total Shareholder Return Amount Senior notes Unsecured Long-Term Debt, Noncurrent Restructuring charges Restructuring Costs and Asset Impairment Charges Accounts and notes receivable, net Total accounts and notes receivable, net Accounts and Financing Receivable, after Allowance for Credit Loss, Current Insider Trading Arrangements [Line Items] Name of exchange on which registered Security Exchange Name 2025 Restructuring Plan 2025 Restructuring Plan [Member] 2025 Restructuring Plan Commitment fee (as a percentage) Line of Credit Facility, Commitment Fee Percentage Parts and service receivables Parts And Service Receivables [Member] Parts and service receivables. Unsecured bridge loan Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Skoda Dealerships Skoda Dealerships [Member] Skoda Dealerships Prepaid expenses Prepaid Expense, Current Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] U.S. U.S. United States Segment [Member] United States Segment [Member] UK Credit Facilities UK Credit Facilities [Member] UK Credit Facilities [Member] Statement Statement [Line Items] Variable Rate [Axis] Variable Rate [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation