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Summary of Significant Accounting Policies (Policies) | 9 Months Ended
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Sep. 30, 2024
Accounting Policies [Abstract] |
Basis of Presentation | Basis of Presentation – The accompanying unaudited condensed consolidated financial statements of Sonic Automotive, Inc. and its wholly owned subsidiaries (collectively referred to herein as “Sonic,” the “Company,” “we,” “us” or “our”) for the three and nine months ended September 30, 2024 and 2023 are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States (the “U.S.”) (“GAAP”) for interim financial information and applicable rules and regulations of the U.S. Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The accompanying unaudited condensed consolidated financial statements reflect, in the opinion of management, all material normal, recurring adjustments necessary to fairly state the financial position, results of operations and cash flows for the periods presented. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes thereto included in Sonic’s Annual Report on Form 10-K for the year ended December 31, 2023. Due to rounding, segment level financial data may not sum to consolidated results. CDK Outage – On June 19, 2024, CDK Global (“CDK”), a third-party provider of certain information systems, notified the Company that CDK had suspended certain systems used by the Company in response to a cybersecurity incident impacting CDK (the “CDK outage”). As a result, the Company experienced disruptions to its dealer management system (“DMS”), its customer relationship management system (the “CRM”) and other systems that support sales, inventory and accounting functions (collectively with the DMS and the CRM the “Affected Systems”). On June 26, 2024, CDK began restoring access to certain of those Affected Systems. The Company performed internal risk assessments and data validation procedures on the Affected Systems, and, beginning on June 30, 2024, the Company resumed processing transactions in the DMS. As of July 31, 2024, the Company regained access to all of the Affected Systems, including CRM and inventory management applications. During the CDK outage, all of the Company’s dealerships remained open and operating, utilizing workaround solutions to minimize the disruption caused by the CDK outage. However, the lack of access to the Affected Systems disrupted the efficient execution of the Company’s dealership operations and affected its ability to manage inventory, track customer leads, deliver vehicles and complete transactions with customers in a typical transaction timeframe, resulting in a negative impact to the Company’s business and results from operations during the quarters ended June 30, 2024 and September 30, 2024.
Principles of Consolidation | Principles of Consolidation – All of our dealership and non-dealership subsidiaries are wholly owned and consolidated in the accompanying unaudited condensed consolidated financial statements, except for one 50%-owned dealership that is accounted for under the equity method. All material intercompany balances and transactions have been eliminated in the accompanying unaudited condensed consolidated financial statements. Certain amounts and percentages may not compute due to rounding.
Per Share Data and Stockholders' Equity | Earnings Per Share – The calculation of diluted earnings per share considers the potential dilutive effect of outstanding restricted stock units, restricted stock and stock options granted under Sonic’s stock compensation plans (and any non-forfeitable dividends paid on such awards).

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- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References No definition available. + Details
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- Definition Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483426/235-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-1 + Details
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