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SEGMENT INFORMATION - Narrative (Details) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) reportableSegment | Dec. 31, 2023 USD ($) | Dec. 11, 2023 USD ($) | Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments | reportableSegment | 2 |  |  |
Goodwill | $ 2,044.7 | $ 2,009.0 |  | $ 1,783.4
Jim Koons Dealerships |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Goodwill |  |  | $ 272.4 |

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