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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Schedule of Share Repurchases | Share repurchases under this authorization were as follows:
|  | Repurchases Occurring in 2021 |  | Cumulative Repurchases as of March 31, 2021
|  | Shares |  | Average Price |  | Shares |  | Average Price
Share Repurchase Authorization |  | — |  |  | $ | — |  |  | 3,719,048 |  |  | $ | 84.02 |

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- Definition Tabular disclosure of stock repurchased and retired during the period. + References No definition available. + Details
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Namespace Prefix: | lad_
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Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration