FINANCE RECEIVABLES - Finance Receivables, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables transferred as sales	$ 60.8	$ 72.0	$ 179.7	$ 228.1
Loans receivables held-for-sale	17.1		17.1			$ 19.2
Total finance receivables, gross	172.3		172.3			199.5
Allowance for credit losses	(11.1)	(4.5)	(11.1)	(4.5)	$ (12.1)	(5.5)	$ (4.5)	$ (6.6)
Total finance receivables, net	161.2		161.2			194.0
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, gross	143.2		143.2			154.0
Allowance for credit losses	(10.4)	(3.0)	(10.4)	(3.0)	(10.9)	(4.0)	(3.0)	(5.7)
Sales-type leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, gross	29.1		29.1			45.5
Allowance for credit losses	(0.7)	$ (1.5)	(0.7)	$ (1.5)	$ (1.2)	(1.5)	$ (1.5)	$ (0.9)
Prepaid Expenses and Other Current Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, net	53.0		53.0			72.0
Other assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, net	$ 108.0		$ 108.0			$ 122.0