SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information [Abstract]
Interest payments made including amounts capitalized	$ 149.3	$ 147.2	$ 92.2
Cash paid during the period related to floor plan interest	4.0	8.4	8.7
Income taxes paid	191.9	198.4	114.2
Loaner vehicles transferred from other current assets to inventory	$ 431.2	$ 281.4	$ 216.3