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INVENTORIES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Components of Inventory [Line Items] |  |  |
Lower of cost or market inventory reserves | $ 9.7 | $ 8.8 |
New vehicles |  |  |
Schedule of Components of Inventory [Line Items] |  |  |
Reduction of new vehicle inventory cost by automobile manufacturer incentives | 13.8 | 8.3 |
Reduction to new vehicle cost of sales by automobile manufacturer incentives | $ 113.4 | $ 94.1 | $ 91.5

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- Definition Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483080/330-10-50-1 + Details
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