GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill by Segment (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance		$ 21.1	$ 234.8
Purchase accounting adjustments for prior year acquisitions		0.2	(26.8)
Impairment	$ (23.1)	(23.1)	(218.6)
Ending balance	0.8	0.8	21.1
Acquisition of Freedom Powersports
Goodwill [Roll Forward]
Acquisition			29.1
Other immaterial acquisitions
Goodwill [Roll Forward]
Acquisition		2.6	2.6
Powersports
Goodwill [Roll Forward]
Beginning balance		20.3	234.0
Purchase accounting adjustments for prior year acquisitions		0.2	(26.8)
Impairment		(23.1)	(218.6)
Ending balance	0.0	0.0	20.3
Powersports | Acquisition of Freedom Powersports
Goodwill [Roll Forward]
Acquisition			29.1
Powersports | Other immaterial acquisitions
Goodwill [Roll Forward]
Acquisition		2.6	2.6
Vehicle Transportation Services
Goodwill [Roll Forward]
Beginning balance		0.8	0.8
Purchase accounting adjustments for prior year acquisitions		0.0	0.0
Impairment		0.0	0.0
Ending balance	$ 0.8	0.8	0.8
Vehicle Transportation Services | Acquisition of Freedom Powersports
Goodwill [Roll Forward]
Acquisition			0.0
Vehicle Transportation Services | Other immaterial acquisitions
Goodwill [Roll Forward]
Acquisition		$ 0.0	$ 0.0