INCOME TAXES (Schedule of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Deferred revenue	$ 35.7	$ 139.4
F&I chargeback liabilities	13.2	11.9
Other accrued liabilities	6.6	2.2
Stock-based compensation	3.1	2.7
Operating lease right-of-use assets	59.1	67.2
Other, net	9.4	10.4
Total deferred income tax assets	127.1	233.8
Deferred income tax liabilities:
Intangible asset amortization	(91.0)	(43.5)
Depreciation	(52.1)	(51.7)
Operating lease liabilities	(57.5)	(65.6)
Deferred Tax Liabilities, Investments	(24.0)	(1.9)
Other, net	(3.2)	(2.0)
Total deferred income tax liabilities	(227.8)	(164.7)
Net deferred income tax (liabilities) assets	(100.7)
Net deferred income tax (liabilities)/ assets	$ 1.3	$ 69.1