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SEGMENT INFORMATION - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) segment | Mar. 31, 2021 segment | Dec. 31, 2021 segment
Segment Reporting Information |  |  |
Number of reportable segments | segment | 2 | 2 | 2
U.S. |  |  |
Segment Reporting Information |  |  |
Gain on dealership dispositions | $ 18.7 |  |
United Kingdom |  |  |
Segment Reporting Information |  |  |
Gain on dealership dispositions | $ 2.7 |  |

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