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INTANGIBLE FRANCHISE RIGHTS AND GOODWILL (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($) dealership	Sep. 30, 2025 USD ($) dealership	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,241.9	$ 2,241.9	$ 2,057.9
U.K.
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	93.0
Goodwill	$ 220.3	$ 220.3		$ 34.3
U.K. | Franchise rights
Finite-Lived Intangible Assets [Line Items]
Number of dealerships | dealership	10	10
Impairment of intangible assets	$ 18.1
Other impairment charges	5.4
Impairment of intangible assets	23.5	$ 23.9
Intangible	$ 121.9	$ 121.9

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