Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying Consolidated Financial Statements include the accounts of AutoNation, Inc. and its subsidiaries. All of our automotive dealership subsidiaries are indirectly wholly owned by the parent company, AutoNation, Inc. Intercompany accounts and transactions have been eliminated in the consolidation.
Use of Estimates	The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. In preparing these financial statements, management has made its best estimates and judgments of certain amounts included in the financial statements. We base our estimates and judgments on historical experience and other assumptions that we believe are reasonable. However, application of these accounting policies involves the exercise of judgment and use of assumptions as to future uncertainties and, as a result, actual results could differ materially from these estimates. We periodically evaluate estimates and assumptions used in the preparation of the financial statements and make changes on a prospective basis when adjustments are necessary. Such estimates and assumptions affect, among other things, our goodwill, indefinite-lived intangible asset, and long-lived asset valuations; inventory valuation; equity investment valuation; assets held for sale; assessments of variable consideration and related constraints related to retrospective commissions; accruals for chargebacks against revenue recognized from the sale of finance and insurance products; accruals related to self-insurance programs; the allowance for expected credit losses; certain legal proceedings; assessment of the annual income tax expense; deferred income taxes and income tax contingencies; and measurement of performance-based compensation costs.
Cash and Cash Equivalents	We consider all highly liquid investments with a maturity of three months or less as of the date of purchase to be cash equivalents unless the investments are legally or contractually restricted for more than three months. Under our cash management system, outstanding checks that are in excess of the cash balances at certain banks are included in Accounts Payable in the Consolidated Balance Sheets and changes in these amounts are reflected in operating cash flows in the accompanying Consolidated Statements of Cash Flows.
Inventory	Inventory consists primarily of new and used vehicles held for sale, valued at the lower of cost or net realizable value using the specific identification method. Cost includes acquisition, reconditioning, dealer installed accessories, and transportation expenses. Our new vehicle inventory costs are generally reduced by manufacturer holdbacks (percentage of either the manufacturer’s suggested retail price or invoice price of a new vehicle that the manufacturer repays to the dealer), incentives, floorplan assistance, and non-reimbursement-based manufacturer advertising assistance. Parts, accessories, and other inventory are valued at the lower of cost or net realizable value.
Auto Loans Receivable	Auto loans receivable include amounts due from customers related to retail vehicle sales financed through our recently acquired captive auto finance company (“CIG” or “AutoNation Finance”), as well as retail vehicle installment sales contracts acquired through third-party independent dealers. Auto loans receivable are presented net of an allowance for expected credit losses.
Financing and Securitization Transactions	Through wholly-owned, bankruptcy-remote, special purpose entities, we utilize warehouse facilities to fund auto loans receivable originated by our auto finance company. Prior to our acquisition, CIG put in place term securitizations to provide long-term funding for certain auto loans receivable initially funded through the warehouse facilities. These securitizations remain in place following the acquisition. In these transactions, a pool of auto loans receivable is sold to a bankruptcy-remote, special purpose entity that, in turn, transfers the receivables to a special purpose securitization trust. The securitization trust issues asset-backed securities, secured or otherwise supported by the transferred receivables, and the proceeds from the sale of the asset-backed securities are used to finance the securitized receivables. We are required to evaluate the term securitization trusts for consolidation.
Property and Equipment, net	Property and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements are capitalized, while minor replacements, maintenance, and repairs are charged to expense as incurred. In addition, we capitalize interest on borrowings during the active construction period of capital projects. Capitalized interest is added to the cost of the assets and depreciated over the estimated useful lives of the assets. Leased property meeting certain criteria is capitalized as a finance lease right-of-use asset and the present value of the related lease payments is recorded as a liability and included in current and/or long-term debt based on the lease term. When property is retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in Other (Income) Expense, Net (within Operating Income) in the Consolidated Statements of Income. See Note 7 of the Notes to Consolidated Financial Statements for detailed information about our property and equipment. Depreciation is recorded over the estimated useful lives of the assets involved using the straight-line method. Leasehold improvements and finance lease right-of-use assets are amortized to depreciation expense over the estimated useful life of the asset or the respective lease term used in determining lease classification, whichever is shorter. The range of estimated useful lives is as follows: Buildings and improvements 5 to 40 years Furniture, fixtures, and equipment 3 to 10 years We continually evaluate property and equipment, including leasehold improvements, to determine whether events or changes in circumstances have occurred that may warrant revision of the estimated useful life or whether the remaining balance should be evaluated for possible impairment. Such events or changes in circumstances may include a significant decrease in market value, a significant change in the business climate in a particular market, a current expectation that more-likely-than-not a long-lived asset will be sold or otherwise disposed of significantly before the end of its previously estimated useful life, or a current-period operating or cash flow loss combined with historical losses or projected future losses. We use an estimate of the related undiscounted cash flows over the remaining life of the asset (asset group) in assessing whether an asset (asset group) is recoverable. If the asset (asset group) is not recoverable, we determine the fair value of the asset (asset group) based on Level 3 inputs, and measure impairment losses based upon the amount by which the carrying amount of the asset (asset group) exceeds the fair value. If we recognize an impairment loss on a depreciable long-lived asset, the adjusted carrying amount of the asset becomes its new cost basis, which is depreciated over the remaining useful life of that asset.When property and equipment are identified as held for sale, we reclassify the held for sale assets to Other Current Assets and cease recording depreciation. We measure each long-lived asset or disposal group at the lower of its carrying amount or fair value less cost to sell and recognize a loss for any initial adjustment of the long-lived asset’s or disposal group’s carrying amount to fair value less cost to sell in the period the “held for sale” criteria are met. Such valuations include estimations of fair values and incremental direct costs to transact a sale. The fair value measurements for our long-lived assets held for sale are based on Level 3 inputs, which consider information obtained from third-party real estate valuation sources, or, in certain cases, pending agreements to sell the related assets. We recognize an impairment loss if the amount of the asset’s or disposal group’s carrying amount exceeds the asset’s or disposal group’s estimated fair value less cost to sell.
Goodwill and Other Intangible Assets, net	Goodwill consists of the cost of acquired businesses in excess of the fair value of the net assets acquired. Additionally, other intangible assets are separately recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the intangible asset can be sold, transferred, licensed, rented, or exchanged, regardless of our intent to do so. Our principal identifiable intangible assets are rights under franchise agreements with vehicle manufacturers. We generally expect our franchise agreements to survive for the foreseeable future and, when the agreements do not have indefinite terms, anticipate routine renewals of the agreements without substantial cost. The contractual terms of our franchise agreements provide for various durations, ranging from one year to no expiration date, and in certain cases, manufacturers have undertaken to renew such franchises upon expiration so long as the dealership is in compliance with the terms of the agreement. However, in general, the states in which we operate have automotive dealership franchise laws that provide that, notwithstanding the terms of any franchise agreement, it is unlawful for a manufacturer to terminate or not renew a franchise unless “good cause” exists. It is generally difficult, outside of bankruptcy, for a manufacturer to terminate or not renew a franchise under these franchise laws, which were designed to protect dealers. In addition, in our experience and historically in the automotive retail industry, dealership franchise agreements are rarely involuntarily terminated or not renewed by the manufacturer outside of bankruptcy. Accordingly, we believe that our franchise agreements will contribute to cash flows for the foreseeable future and have indefinite lives. Other intangible assets are amortized using a straight-line method over their useful lives, generally ranging from three to thirty years.
Stock-Based Compensation	We grant stock-based awards in the form of time-based and performance-based restricted stock units (“RSUs”), which are issued from our treasury stock upon vesting. Compensation cost for RSUs is based on the closing price of our common stock on the date of grant. Prior to 2017, we also granted stock options and restricted stock, which were fully vested as of December 31, 2020.Certain of our equity-based compensation plans contain provisions that provide for vesting of awards upon retirement. Accordingly, compensation cost for time-based RSUs is, and for restricted stock awards and stock options was, recognized on a straight-line basis over the shorter of the stated vesting period or the period until associates become retirement-eligible. Compensation cost for performance-based RSUs is recognized over the requisite service period based on the expected achievement level of the performance goals, which is evaluated over the performance period. We account for forfeitures of stock-based awards as they occur.
Insurance	Under our self-insurance programs, we retain various levels of aggregate loss limits, per claim deductibles, and claims-handling expenses as part of our various insurance programs, including property and casualty, automobile, workers’ compensation, and employee medical benefits. Costs in excess of this retained risk per claim may be insured under various contracts with third-party insurance carriers. We review our claim and loss history on a periodic basis to assist in assessing our future liability. The ultimate costs of these retained insurance risks are estimated by management and by third-party actuarial evaluation of historical claims experience, adjusted for current trends and changes in claims-handling procedures.
Manufacturer Incentives And Other Rebates	We receive various incentives from manufacturers based on achieving certain objectives, such as specified sales volume targets, as well as other objectives, including maintaining standards of a particular vehicle brand, which may include but are not limited to facility image and design requirements, customer satisfaction survey results, and training standards, among others. These incentives are typically based upon units purchased or sold. These manufacturer incentives are recognized as a reduction of new vehicle cost of sales when earned, generally at the time the related vehicles are sold or upon attainment of the particular program goals, whichever is later. We also receive manufacturer rebates and assistance for holdbacks, floorplan interest, and non-reimbursement-based advertising expenses (described below), which are reflected as a reduction in the carrying value of each vehicle purchased by us. We recognize holdbacks, floorplan interest assistance, non-reimbursement-based advertising rebates, cash incentives, and other rebates received from manufacturers that are tied to specific vehicles as a reduction to cost of sales as the related vehicles are sold.
Advertising	We generally expense the cost of advertising as incurred, net of earned manufacturer reimbursements for specific advertising costs and other discounts.
Reimbursable advertising assistance	Manufacturer advertising rebates that are reimbursements of costs associated with specific advertising expenses are earned in accordance with the respective manufacturers’ reimbursement-based advertising assistance programs, which is typically after we have incurred the corresponding advertising expenses, and are reflected as a reduction of advertising expense.
Parts and Service Internal Profit	Our parts and service departments recondition the majority of used vehicles acquired by our used vehicle departments and perform preparatory work and accessory installation on new vehicles acquired by our new vehicle departments. The parts and service departments charge the new and used vehicle departments as if they were third parties in order to account for total activity performed by that department. Revenues and costs of sales associated with the internal work performed by our parts and service departments are reflected in our parts and service results in our Consolidated Statements of Income. New and used vehicle revenues and costs of sales are reduced by the amount of the intracompany charge. As a result, the revenues and costs of sales associated with the internal work performed by our parts and service departments are eliminated in consolidation. We also defer internal profit associated with the internal work performed by our parts and service departments on our vehicle inventory until such vehicles have been sold.
Income Taxes	We file a consolidated federal income tax return. Deferred income taxes have been provided for temporary differences between the recognition of revenue and expenses for financial and income tax reporting purposes and between the tax basis of assets and liabilities and their reported amounts in the financial statements.
Earnings (Loss) Per Share	Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding for the period, including vested RSU awards. Diluted earnings per share is computed by dividing net income by the weighted average number of shares outstanding, noted above, adjusted for the dilutive effect of unvested RSU awards and stock options.
Taxes Assessed by Governmental Authorities	Taxes assessed by governmental authorities that are directly imposed on revenue transactions are excluded from revenue.
Revenue Recognition	New and Used Vehicle We sell new vehicles at our franchised dealerships and used vehicles at our franchised dealerships and AutoNation USA used vehicle stores. The transaction price for a vehicle sale is determined with the customer at the time of sale. Customers often trade in their own vehicle to apply toward the purchase of a retail new or used vehicle. The “trade-in” vehicle is a type of noncash consideration measured at fair value, based on external and internal market data for the specific vehicle, and applied as payment to the contract price for the purchased vehicle. When we sell a new or used vehicle, we typically transfer control at a point in time upon delivery of the vehicle to the customer, which is generally at time of sale, as the customer is able to direct the use of, and obtain substantially all of the benefits from, the vehicle at such time. We do not directly finance our customers’ vehicle purchases or leases. We offer indirect financing on certain vehicles we sell, and income from such financing is reflected in our AutoNation Finance results within Other (Income) Expense, Net in our Consolidated Statements of Income. In many cases, we arrange third-party financing for the retail sale or lease of vehicles to our customers in exchange for a fee paid to us by the third-party financial institution. We receive payment directly from the customer at the time of sale, from the third-party financial institution (referred to as contracts-in-transit or vehicle receivables, which are part of our receivables from contracts with customers), or from our captive finance company within a short period of time following the sale. We establish provisions, which are not significant, for estimated returns and warranties on the basis of both historical information and current trends. We also offer auction services at our AutoNation-branded automotive auctions, revenue from which is included within Used Vehicle wholesale revenue. The transaction price for auction services is based on an established pricing schedule and determined with the customer at the time of sale, and payment is due upon completion of service. We satisfy our performance obligations related to auction services at the point in time that control transfers to the customer, which is when the service is completed. Parts and Service We sell parts and automotive services related to customer-paid repairs and maintenance, repairs and maintenance under manufacturer warranties and extended service contracts, and collision-related repairs. We also sell parts through our wholesale and retail counter channels. Each automotive repair and maintenance service is a single performance obligation that includes both the parts and labor associated with the service. Payment for automotive service work is typically due upon completion of the service, which is generally completed within a short period of time from contract inception. The transaction price for automotive repair and maintenance services is based on the parts used, the number of labor hours applied, and standardized hourly labor rates. We satisfy our performance obligations, transfer control, and recognize revenue over time for automotive repair and maintenance services because we are creating an asset with no alternative use and we have an enforceable right to payment for performance completed to date. We use an input method to recognize revenue and measure progress based on labor hours expended relative to the total labor hours expected to be expended to satisfy the performance obligation. We have determined labor hours expended to be the relevant measure of work performed to complete the automotive repair or maintenance service for the customer. As a practical expedient, since automotive repair and maintenance service contracts have an original duration of one year or less, we do not consider the time value of money, and we do not disclose estimated revenue expected to be recognized in the future for performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period or when we expect to recognize such revenue. The transaction price for wholesale and retail counter parts sales is determined at the time of sale based on the quantity and price of each product purchased. Payment is typically due at time of sale, or within a short period of time following the sale. We establish provisions, which are not significant, for estimated parts returns based on historical information and current trends. Delivery methods of wholesale and retail counter parts vary; however, we generally consider control of wholesale and retail counter parts to transfer when the products are shipped, which typically occurs the same day as or within a few days of the sale. Finance and Insurance We sell and receive a commission on the following types of finance and insurance products: extended service contracts, maintenance programs, guaranteed auto protection (known as “GAP,” this protection covers the shortfall between a customer’s loan balance and insurance payoff in the event of a casualty), “tire and wheel” protection, and theft protection products, among others. We offer products that are sold and administered by independent third parties, including the vehicle manufacturers’ captive finance subsidiaries. Pursuant to our arrangements with these third-party providers, we sell the products on a commission basis, and, for certain products, we also participate in future profit pursuant to retrospective commission arrangements with the issuers of those contracts through the life of the related contracts. For retrospective commission arrangements, we are paid annually based on the annual performance of the issuers’ product portfolio. For the majority of finance and insurance product sales, our performance obligation is to arrange for the provision of goods or services by another party. Our performance obligation is satisfied when this arrangement is made, which is when the finance and insurance product is delivered to the end-customer, generally at the time of the vehicle sale. As agent, we recognize revenue in the amount of any fee or commission to which we expect to be entitled, which is the net amount of consideration that we retain after paying the third-party provider the consideration received in exchange for the goods or services to be fulfilled by that party. The retrospective commission we earn on each product sold is a form of variable consideration that is subject to constraint due to it being highly susceptible to factors outside our influence and control. Our agreements with the third-party administrators generally provide for an annual retrospective commission payout based on the product portfolio performance for that year. We estimate variable consideration related to retrospective commissions and perform a constraint analysis using the expected value method based on the historical performance of the product portfolios and current trends to estimate the amount of retrospective commissions to which we expect we will be entitled. At each reporting period, we reassess our expectations about the amount of retrospective commission variable consideration to which we expect to be entitled and recognize revenue when we no longer believe a significant revenue reversal is probable. Additionally, we may be charged back for commissions related to finance and insurance products in the event of early termination, default, or prepayment of the contracts by end-customers (“chargebacks”). An estimated refund liability for chargebacks against the revenue recognized from sales of finance and insurance products is recorded in the period in which the related revenue is recognized and is based primarily on our historical chargeback experience. We update our measurement of the chargeback liability at each reporting date for changes in expectations about the amount of chargebacks. See Note 11 of the Notes to Consolidated Financial Statements for more information regarding chargeback liabilities. We also sell a vehicle maintenance program (the Vehicle Care Program or “VCP”) where we act as the principal in the sale since we have the primary responsibility to provide the specified services to the customer under the VCP contract. When a VCP product is sold in conjunction with the sale of a vehicle to the same customer, the stand-alone selling prices of each product are based on observable selling prices. Under a VCP contract, a customer purchases a specific number of maintenance services to be redeemed at an AutoNation location over a five-year term from the date of purchase. We satisfy our performance obligations and recognize revenue as maintenance services are rendered, since the customer benefits when we have completed the maintenance service. Although payment is due from the customer at the time of sale and services are rendered at points in time during a five-year contract term, these contracts do not contain a significant financing component as the transfer of services is at the discretion of the customer.
Auto loans receivable, Allowance for credit losses	The allowance for credit losses represents the net credit losses expected over the remaining contractual life of our auto loans receivable. The allowance for credit losses is determined using a vintage-level statistical model that captures the relationship between historical changes in gross losses and the lifetime loss curves by month on book, credit tiers at origination, and seasonality, adjusted for expected recoveries based on historical recovery trends. The credit loss model also incorporates reasonable and supportable forecasts about the future utilizing a forecast of a macroeconomic variable, specifically, the change in U.S. disposable personal income, which we believe is most strongly correlated to evaluating and predicting expected credit losses of our auto loans receivable. We utilize a reasonable and supportable forecast period of one year, after which we immediately revert to historical experience. We periodically consider whether the use of alternative variables would result in improved credit loss model accuracy and revise the model when appropriate. We also consider whether qualitative adjustments are necessary for factors that are not reflected in the quantitative methods but impact the measurement of estimated credit losses. Such adjustments include the expectations of the impact of recent economic trends on customer behavior. The net loss estimate is calculated by applying the loss rates developed using the methods described above to the amortized cost basis of the auto loans receivable. The change in the allowance for credit losses is recognized through an adjustment to the provision for credit losses.
Impairment Of Long-Lived Assets	Nonfinancial assets such as goodwill, other intangible assets, and long-lived assets held and used are measured at fair value when there is an indicator of impairment and recorded at fair value only when impairment is recognized or for a business combination. The fair values less costs to sell of long-lived assets or disposal groups held for sale are assessed each reporting period they remain classified as held for sale. Subsequent changes in the held for sale long-lived asset’s or disposal group’s fair value less cost to sell (increase or decrease) are reported as an adjustment to its carrying amount, except that the adjusted carrying amount cannot exceed the carrying amount of the long-lived asset or disposal group at the time it was initially classified as held for sale.

Description of Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying Consolidated Financial Statements include the accounts of AutoNation, Inc. and its subsidiaries. All of our automotive dealership subsidiaries are indirectly wholly owned by the parent company, AutoNation, Inc. Intercompany accounts and transactions have been eliminated in the consolidation.

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. In preparing these financial statements, management has made its best estimates and judgments of certain amounts included in the financial statements. We base our estimates and judgments on historical experience and other assumptions that we believe are reasonable. However, application of these accounting policies involves the exercise of judgment and use of assumptions as to future uncertainties and, as a result, actual results could differ materially from these estimates. We periodically evaluate estimates and assumptions used in the preparation of the financial statements and make changes on a prospective basis when adjustments are necessary. Such estimates and assumptions affect, among other things, our goodwill, indefinite-lived intangible asset, and long-lived asset valuations; inventory valuation; equity investment valuation; assets held for sale; assessments of variable consideration and related constraints related to retrospective commissions; accruals for chargebacks against revenue recognized from the sale of finance and insurance products; accruals related to self-insurance programs; the allowance for expected credit losses; certain legal proceedings; assessment of the annual income tax expense; deferred income taxes and income tax contingencies; and measurement of performance-based compensation costs.

Cash and Cash Equivalents

We consider all highly liquid investments with a maturity of three months or less as of the date of purchase to be cash equivalents unless the investments are legally or contractually restricted for more than three months. Under our cash management system, outstanding checks that are in excess of the cash balances at certain banks are included in Accounts Payable in the Consolidated Balance Sheets and changes in these amounts are reflected in operating cash flows in the accompanying Consolidated Statements of Cash Flows.

Inventory

Inventory consists primarily of new and used vehicles held for sale, valued at the lower of cost or net realizable value using the specific identification method. Cost includes acquisition, reconditioning, dealer installed accessories, and transportation expenses. Our new vehicle inventory costs are generally reduced by manufacturer holdbacks (percentage of either the manufacturer’s suggested retail price or invoice price of a new vehicle that the manufacturer repays to the dealer), incentives, floorplan assistance, and non-reimbursement-based manufacturer advertising assistance. Parts, accessories, and other inventory are valued at the lower of cost or net realizable value.

Auto Loans Receivable

Auto loans receivable include amounts due from customers related to retail vehicle sales financed through our recently acquired captive auto finance company (“CIG” or “AutoNation Finance”), as well as retail vehicle installment sales contracts acquired through third-party independent dealers. Auto loans receivable are presented net of an allowance for expected credit losses.

Financing and Securitization Transactions

Through wholly-owned, bankruptcy-remote, special purpose entities, we utilize warehouse facilities to fund auto loans receivable originated by our auto finance company. Prior to our acquisition, CIG put in place term securitizations to provide long-term funding for certain auto loans receivable initially funded through the warehouse facilities. These securitizations remain in place following the acquisition. In these transactions, a pool of auto loans receivable is sold to a bankruptcy-remote, special purpose entity that, in turn, transfers the receivables to a special purpose securitization trust. The securitization trust issues asset-backed securities, secured or otherwise supported by the transferred receivables, and the proceeds from the sale of the asset-backed securities are used to finance the securitized receivables. We are required to evaluate the term securitization trusts for consolidation.

Property and Equipment, net

Property and equipment are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements are capitalized, while minor replacements, maintenance, and repairs are charged to expense as incurred. In addition, we capitalize interest on borrowings during the active construction period of capital projects. Capitalized interest is added to the cost of the assets and depreciated over the estimated useful lives of the assets. Leased property meeting certain criteria is capitalized as a finance lease right-of-use asset and the present value of the related lease payments is recorded as a liability and included in current and/or long-term debt based on the lease term. When property is retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in Other (Income) Expense, Net (within Operating Income) in the Consolidated Statements of Income. See Note 7 of the Notes to Consolidated Financial Statements for detailed information about our property and equipment.

Depreciation is recorded over the estimated useful lives of the assets involved using the straight-line method. Leasehold improvements and finance lease right-of-use assets are amortized to depreciation expense over the estimated useful life of the asset or the respective lease term used in determining lease classification, whichever is shorter. The range of estimated useful lives is as follows:

Buildings and improvements 5 to 40 years

Furniture, fixtures, and equipment 3 to 10 years

We continually evaluate property and equipment, including leasehold improvements, to determine whether events or changes in circumstances have occurred that may warrant revision of the estimated useful life or whether the remaining balance should be evaluated for possible impairment. Such events or changes in circumstances may include a significant decrease in market value, a significant change in the business climate in a particular market, a current expectation that more-likely-than-not a long-lived asset will be sold or otherwise disposed of significantly before the end of its previously estimated useful life, or a current-period operating or cash flow loss combined with historical losses or projected future losses. We use an estimate of the related undiscounted cash flows over the remaining life of the asset (asset group) in assessing whether an asset (asset group) is recoverable. If the asset (asset group) is not recoverable, we determine the fair value of the asset (asset group) based on Level 3 inputs, and measure impairment losses based upon the amount by which the carrying amount of the asset (asset group) exceeds the fair value. If we recognize an impairment loss on a depreciable long-lived asset, the adjusted carrying amount of the asset becomes its new cost basis, which is depreciated over the remaining useful life of that asset.When property and equipment are identified as held for sale, we reclassify the held for sale assets to Other Current Assets and cease recording depreciation. We measure each long-lived asset or disposal group at the lower of its carrying amount or fair value less cost to sell and recognize a loss for any initial adjustment of the long-lived asset’s or disposal group’s carrying amount to fair value less cost to sell in the period the “held for sale” criteria are met. Such valuations include estimations of fair values and incremental direct costs to transact a sale. The fair value measurements for our long-lived assets held for sale are based on Level 3 inputs, which consider information obtained from third-party real estate valuation sources, or, in certain cases, pending agreements to sell the related assets. We recognize an impairment loss if the amount of the asset’s or disposal group’s carrying amount exceeds the asset’s or disposal group’s estimated fair value less cost to sell.

Goodwill and Other Intangible Assets, net

Goodwill consists of the cost of acquired businesses in excess of the fair value of the net assets acquired. Additionally, other intangible assets are separately recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the intangible asset can be sold, transferred, licensed, rented, or exchanged, regardless of our intent to do so.

Our principal identifiable intangible assets are rights under franchise agreements with vehicle manufacturers. We generally expect our franchise agreements to survive for the foreseeable future and, when the agreements do not have indefinite terms, anticipate routine renewals of the agreements without substantial cost. The contractual terms of our franchise agreements provide for various durations, ranging from one year to no expiration date, and in certain cases, manufacturers have undertaken to renew such franchises upon expiration so long as the dealership is in compliance with the terms of the agreement. However, in general, the states in which we operate have automotive dealership franchise laws that provide that, notwithstanding the terms of any franchise agreement, it is unlawful for a manufacturer to terminate or not renew a franchise unless “good cause” exists. It is generally difficult, outside of bankruptcy, for a manufacturer to terminate or not renew a franchise under these franchise laws, which were designed to protect dealers. In addition, in our experience and historically in the automotive retail industry, dealership franchise agreements are rarely involuntarily

terminated or not renewed by the manufacturer outside of bankruptcy. Accordingly, we believe that our franchise agreements will contribute to cash flows for the foreseeable future and have indefinite lives. Other intangible assets are amortized using a straight-line method over their useful lives, generally ranging from three to thirty years.

Stock-Based Compensation

We grant stock-based awards in the form of time-based and performance-based restricted stock units (“RSUs”), which are issued from our treasury stock upon vesting. Compensation cost for RSUs is based on the closing price of our common stock on the date of grant. Prior to 2017, we also granted stock options and restricted stock, which were fully vested as of December 31, 2020.Certain of our equity-based compensation plans contain provisions that provide for vesting of awards upon retirement. Accordingly, compensation cost for time-based RSUs is, and for restricted stock awards and stock options was, recognized on a straight-line basis over the shorter of the stated vesting period or the period until associates become retirement-eligible. Compensation cost for performance-based RSUs is recognized over the requisite service period based on the expected achievement level of the performance goals, which is evaluated over the performance period. We account for forfeitures of stock-based awards as they occur.

Insurance

Under our self-insurance programs, we retain various levels of aggregate loss limits, per claim deductibles, and claims-handling expenses as part of our various insurance programs, including property and casualty, automobile, workers’ compensation, and employee medical benefits. Costs in excess of this retained risk per claim may be insured under various contracts with third-party insurance carriers. We review our claim and loss history on a periodic basis to assist in assessing our future liability. The ultimate costs of these retained insurance risks are estimated by management and by third-party actuarial evaluation of historical claims experience, adjusted for current trends and changes in claims-handling procedures.

Manufacturer Incentives And Other Rebates

We receive various incentives from manufacturers based on achieving certain objectives, such as specified sales volume targets, as well as other objectives, including maintaining standards of a particular vehicle brand, which may include but are not limited to facility image and design requirements, customer satisfaction survey results, and training standards, among others. These incentives are typically based upon units purchased or sold. These manufacturer incentives are recognized as a reduction of new vehicle cost of sales when earned, generally at the time the related vehicles are sold or upon attainment of the particular program goals, whichever is later.

We also receive manufacturer rebates and assistance for holdbacks, floorplan interest, and non-reimbursement-based advertising expenses (described below), which are reflected as a reduction in the carrying value of each vehicle purchased by us. We recognize holdbacks, floorplan interest assistance, non-reimbursement-based advertising rebates, cash incentives, and other rebates received from manufacturers that are tied to specific vehicles as a reduction to cost of sales as the related vehicles are sold.

Advertising

We generally expense the cost of advertising as incurred, net of earned manufacturer reimbursements for specific advertising costs and other discounts.

Reimbursable advertising assistance

Manufacturer advertising rebates that are reimbursements of costs associated with specific advertising expenses are earned in accordance with the respective manufacturers’ reimbursement-based advertising assistance programs, which is typically after we have incurred the corresponding advertising expenses, and are reflected as a reduction of advertising expense.

Parts and Service Internal Profit

Our parts and service departments recondition the majority of used vehicles acquired by our used vehicle departments and perform preparatory work and accessory installation on new vehicles acquired by our new vehicle departments. The parts and service departments charge the new and used vehicle departments as if they were third parties in order to account for total activity performed by that department. Revenues and costs of sales associated with the internal work performed by our parts and service departments are reflected in our parts and service results in our Consolidated Statements of Income. New and used vehicle revenues and costs of sales are reduced by the amount of the intracompany charge. As a result, the revenues and costs of sales associated with the internal work performed by our parts and service departments are eliminated in consolidation. We also defer internal profit associated with the internal work performed by our parts and service departments on our vehicle inventory until such vehicles have been sold.

Income Taxes

We file a consolidated federal income tax return. Deferred income taxes have been provided for temporary differences between the recognition of revenue and expenses for financial and income tax reporting purposes and between the tax basis of assets and liabilities and their reported amounts in the financial statements.

Earnings (Loss) Per Share

Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding for the period, including vested RSU awards. Diluted earnings per share is computed by dividing net income by the weighted average number of shares outstanding, noted above, adjusted for the dilutive effect of unvested RSU awards and stock options.

Taxes Assessed by Governmental Authorities

Taxes assessed by governmental authorities that are directly imposed on revenue transactions are excluded from revenue.

Revenue Recognition

New and Used Vehicle

We sell new vehicles at our franchised dealerships and used vehicles at our franchised dealerships and AutoNation USA used vehicle stores. The transaction price for a vehicle sale is determined with the customer at the time of sale. Customers often trade in their own vehicle to apply toward the purchase of a retail new or used vehicle. The “trade-in” vehicle is a type of noncash consideration measured at fair value, based on external and internal market data for the specific vehicle, and applied as payment to the contract price for the purchased vehicle.

When we sell a new or used vehicle, we typically transfer control at a point in time upon delivery of the vehicle to the customer, which is generally at time of sale, as the customer is able to direct the use of, and obtain substantially all of the benefits from, the vehicle at such time. We do not directly finance our customers’ vehicle purchases or leases. We offer indirect financing on certain vehicles we sell, and income from such financing is reflected in our AutoNation Finance results within Other (Income) Expense, Net in our Consolidated Statements of Income. In many cases, we arrange third-party financing for the retail sale or lease of vehicles to our customers in exchange for a fee paid to us by the third-party financial institution. We receive payment directly from the customer at the time of sale, from the third-party financial institution (referred to as contracts-in-transit or vehicle receivables, which are part of our receivables from contracts with customers), or from our captive finance company within a short period of time following the sale. We establish provisions, which are not significant, for estimated returns and warranties on the basis of both historical information and current trends.

We also offer auction services at our AutoNation-branded automotive auctions, revenue from which is included within Used Vehicle wholesale revenue. The transaction price for auction services is based on an established pricing schedule and determined with the customer at the time of sale, and payment is due upon completion of service. We satisfy our performance obligations related to auction services at the point in time that control transfers to the customer, which is when the service is completed.

Parts and Service

We sell parts and automotive services related to customer-paid repairs and maintenance, repairs and maintenance under manufacturer warranties and extended service contracts, and collision-related repairs. We also sell parts through our wholesale and retail counter channels.

Each automotive repair and maintenance service is a single performance obligation that includes both the parts and labor associated with the service. Payment for automotive service work is typically due upon completion of the service, which is generally completed within a short period of time from contract inception. The transaction price for automotive repair and maintenance services is based on the parts used, the number of labor hours applied, and standardized hourly labor rates. We satisfy our performance obligations, transfer control, and recognize revenue over time for automotive repair and maintenance services because we are creating an asset with no alternative use and we have an enforceable right to payment for performance completed to date. We use an input method to recognize revenue and measure progress based on labor hours expended relative to the total labor hours expected to be expended to satisfy the performance obligation. We have determined labor hours expended to be the relevant measure of work performed to complete the automotive repair or maintenance service for the customer. As a practical expedient, since automotive repair and maintenance service contracts have an original duration of one year or less, we do not consider the time value of money, and we do not disclose estimated revenue expected to be recognized in the future for performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period or when we expect to recognize such revenue.

The transaction price for wholesale and retail counter parts sales is determined at the time of sale based on the quantity and price of each product purchased. Payment is typically due at time of sale, or within a short period of time following the sale. We establish provisions, which are not significant, for estimated parts returns based on historical information and current trends. Delivery methods of wholesale and retail counter parts vary; however, we generally consider control of wholesale and retail counter parts to transfer when the products are shipped, which typically occurs the same day as or within a few days of the sale.

Finance and Insurance

We sell and receive a commission on the following types of finance and insurance products: extended service contracts, maintenance programs, guaranteed auto protection (known as “GAP,” this protection covers the shortfall between a customer’s loan balance and insurance payoff in the event of a casualty), “tire and wheel” protection, and theft protection products, among others. We offer products that are sold and administered by independent third parties, including the vehicle manufacturers’ captive finance subsidiaries.

Pursuant to our arrangements with these third-party providers, we sell the products on a commission basis, and, for certain products, we also participate in future profit pursuant to retrospective commission arrangements with the issuers of those contracts through the life of the related contracts. For retrospective commission arrangements, we are paid annually based on the annual performance of the issuers’ product portfolio. For the majority of finance and insurance product sales, our performance obligation is to arrange for the provision of goods or services by another party. Our performance obligation is satisfied when this arrangement is made, which is when the finance and insurance product is delivered to the end-customer, generally at the time of the vehicle sale. As agent, we recognize revenue in the amount of any fee or commission to which we expect to be entitled, which is the net amount of consideration that we retain after paying the third-party provider the consideration received in exchange for the goods or services to be fulfilled by that party.

The retrospective commission we earn on each product sold is a form of variable consideration that is subject to constraint due to it being highly susceptible to factors outside our influence and control. Our agreements with the third-party administrators generally provide for an annual retrospective commission payout based on the product portfolio performance for that year. We estimate variable consideration related to retrospective commissions and perform a constraint analysis using the expected value method based on the historical performance of the product portfolios and current trends to estimate the amount of retrospective commissions to which we expect we will be entitled. At each reporting period, we reassess our expectations about the amount of retrospective commission variable consideration to which we expect to be entitled and recognize revenue when we no longer believe a significant revenue reversal is probable.

Additionally, we may be charged back for commissions related to finance and insurance products in the event of early termination, default, or prepayment of the contracts by end-customers (“chargebacks”). An estimated refund liability for chargebacks against the revenue recognized from sales of finance and insurance products is recorded in the period in which the related revenue is recognized and is based primarily on our historical chargeback experience. We update our measurement of the chargeback liability at each reporting date for changes in expectations about the amount of chargebacks. See Note 11 of the Notes to Consolidated Financial Statements for more information regarding chargeback liabilities. We also sell a vehicle maintenance program (the Vehicle Care Program or “VCP”) where we act as the principal in the sale since we have the primary responsibility to provide the specified services to the customer under the VCP contract. When a VCP product is sold in conjunction with the sale of a vehicle to the same customer, the stand-alone selling prices of each product are based on observable selling prices. Under a VCP contract, a customer purchases a specific number of maintenance services to be redeemed at an AutoNation location over a five-year term from the date of purchase. We satisfy our performance obligations and recognize revenue as maintenance services are rendered, since the customer benefits when we have completed the maintenance service. Although payment is due from the customer at the time of sale and services are rendered at points in time during a five-year contract term, these contracts do not contain a significant financing component as the transfer of services is at the discretion of the customer.

Auto loans receivable, Allowance for credit losses

The allowance for credit losses represents the net credit losses expected over the remaining contractual life of our auto loans receivable. The allowance for credit losses is determined using a vintage-level statistical model that captures the relationship between historical changes in gross losses and the lifetime loss curves by month on book, credit tiers at origination, and seasonality, adjusted for expected recoveries based on historical recovery trends. The credit loss model also incorporates reasonable and supportable forecasts about the future utilizing a forecast of a macroeconomic variable, specifically, the change in U.S. disposable personal income, which we believe is most strongly correlated to evaluating and predicting expected credit losses of our auto loans receivable. We utilize a reasonable and supportable forecast period of one year, after which we immediately revert to historical experience.

We periodically consider whether the use of alternative variables would result in improved credit loss model accuracy and revise the model when appropriate. We also consider whether qualitative adjustments are necessary for factors that are not reflected in the quantitative methods but impact the measurement of estimated credit losses. Such adjustments include the expectations of the impact of recent economic trends on customer behavior.

The net loss estimate is calculated by applying the loss rates developed using the methods described above to the amortized cost basis of the auto loans receivable. The change in the allowance for credit losses is recognized through an adjustment to the provision for credit losses.

Impairment Of Long-Lived Assets

Nonfinancial assets such as goodwill, other intangible assets, and long-lived assets held and used are measured at fair value when there is an indicator of impairment and recorded at fair value only when impairment is recognized or for a business combination. The fair values less costs to sell of long-lived assets or disposal groups held for sale are assessed each reporting period they remain classified as held for sale. Subsequent changes in the held for sale long-lived asset’s or disposal group’s fair value less cost to sell (increase or decrease) are reported as an adjustment to its carrying amount, except that the adjusted carrying amount cannot exceed the carrying amount of the long-lived asset or disposal group at the time it was initially classified as held for sale.