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ACQUISITIONS - Other Acquisitions (Details) $ in Millions	1 Months Ended	6 Months Ended
	Nov. 30, 2021 USD ($) dealership	Jun. 30, 2022 USD ($) dealership	Jun. 30, 2021 USD ($) dealership
Acquisitions and Dispositions
Cash paid		$ 318.1	$ 49.9
Prime Automotive Group
Acquisitions and Dispositions
Number of dealerships acquired | dealership	28
Aggregate consideration	$ 967.6
Intangible franchise rights	$ 135.3
U.S. | Toyota Dealership
Acquisitions and Dispositions
Number of dealerships acquired | dealership		2	2
Aggregate consideration		$ 319.0	$ 49.9
Cash paid		318.2
Liabilities incurred to acquire business		0.8
Goodwill acquired		171.6	$ 22.6
Intangible franchise rights		$ 84.3

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