ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accounts payable	$ 81.9	$ 85.5
Loaner vehicle notes payable	80.9	76.6
Accrued compensation	24.5	26.1
Taxes payable	41.2	27.3
Accrued finance and insurance chargebacks	22.9	19.9
Accrued insurance	19.9	13.3
Accrued advertising	7.6	4.0
Accrued interest	4.9	4.8
Other	25.3	24.2
Accounts payable and accrued liabilities	$ 309.1	$ 281.7