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FLOORPLAN NOTES PAYABLE - Schedule of Floorplan Notes Payable (Details) - Line of credit - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Revolving Credit Facility — floorplan notes payable
Line of Credit Facility
Long-term debt, gross	$ 607.9	$ 511.7
Long-term debt, offset	(77.9)	(268.6)
Long-term debt	529.9	243.1
Other non-manufacturer facilities
Line of Credit Facility
Long-term debt	46.1	51.9
Floorplan notes payable — credit facility and other, net
Line of Credit Facility
Long-term debt	576.0	295.0
FMCC Facility
Line of Credit Facility
Long-term debt, gross	25.1	22.8
Long-term debt, offset	(5.5)	(3.3)
Long-term debt	19.6	19.5
Other manufacturer affiliate facilities
Line of Credit Facility
Long-term debt	185.3	216.5
Floorplan notes payable — manufacturer affiliates, net
Line of Credit Facility
Long-term debt	$ 204.9	$ 236.0

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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