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ACQUISITIONS - Assets acquired and liabilities assumed (Details) - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Nov. 18, 2021
Identifiable assets acquired and liabilities assumed
Goodwill		$ 1,588.1	$ 1,420.2
Prime Automotive Group
Business Acquisition
Total consideration	$ 967.6
Identifiable assets acquired and liabilities assumed
Inventories				$ 136.7
Property and equipment				267.4
Intangible franchise rights				135.3
Operating lease assets				58.3
Other assets				63.1
Total assets acquired				660.8
Operating lease liabilities				56.6
Other liabilities				38.3
Total liabilities assumed				94.9
Total identifiable net assets				565.9
Goodwill				401.7
Assets held for sale				55.3
Liabilities held for sale				$ 1.7

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