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ACQUISITIONS - Other Acquisitions (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 17, 2021 dealership | Nov. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) dealership | Dec. 31, 2020 USD ($)
Business Acquisition |  |  |  |
Additions through acquisitions |  |  | $ 453.5 | $ 1.4
Prime Automotive Group |  |  |  |
Business Acquisition |  |  |  |
Number of dealerships acquired | dealership | 27 |  |  |
Aggregate consideration paid for dealerships |  | $ 934.2 |  |
2021 Acquisitions |  |  |  |
Business Acquisition |  |  |  |
Aggregate consideration paid for dealerships |  |  | 166.8 |
Additions through acquisitions |  |  | $ 70.1 |
U.S. |  |  |  |
Business Acquisition |  |  |  |
Number of dealerships acquired | dealership |  |  | 5 |
Number of franchises acquired | dealership |  |  | 8 |
Additions through acquisitions |  |  | $ 434.6 | 1.4
U.S. | Collision Center |  |  |  |
Business Acquisition |  |  |  |
Aggregate consideration paid for dealerships |  |  |  | 1.3
U.K. |  |  |  |
Business Acquisition |  |  |  |
Number of dealerships acquired | dealership |  |  | 7 |
Number of franchises acquired | dealership |  |  | 9 |
Additions through acquisitions |  |  | $ 18.9 | $ 0.0

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