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Summary of Quarterly Financial Data (Unaudited) - Additional Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Unaudited Quarterly Financial Data [Line Items] |  |  |
Asset impairment charges | $ 100,000 | $ 270,000,000.0 | $ 20,800,000
Executive transition costs |  |  | $ 6,300,000
Long-term compensation costs | $ 6,500,000 |  |
Franchised dealerships |  |  |
Condensed Unaudited Quarterly Financial Data [Line Items] |  |  |
Asset impairment charges |  | $ 270,000,000.0 |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228 + Details
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