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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
| Year Ended December 31,
($ in millions, except for per share amounts) | 2023 |  | 2022 | 2021
Net income attributable to Lithia Motors, Inc. and applicable to common stockholders | $ | 1,000.8 |  |  | $ | 1,251.0 |  |  | $ | 1,060.1 |
Weighted average common shares outstanding – basic | 27.5 |  |  | 28.2 |  |  | 28.8 |
Effect of employee stock purchases and restricted stock units on weighted average common shares | 0.1 |  |  | 0.1 |  |  | 0.2 |
Weighted average common shares outstanding – diluted | 27.6 |  |  | 28.3 |  |  | 29.0 |
Basic earnings per share attributable to Lithia Motors, Inc. | $ | 36.36 |  |  | $ | 44.38 |  |  | $ | 36.81 |
Diluted earnings per share attributable to Lithia Motors, Inc. | $ | 36.29 |  |  | $ | 44.17 |  |  | $ | 36.54 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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