FINANCE RECEIVABLES - Finance Receivables, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables transferred as sales	$ 75.3	$ 64.8	$ 118.5	$ 156.1
Loans receivables held-for-sale	18.2		18.2			$ 19.2
Total finance receivables, gross	194.8		194.8			199.5
Allowance for credit losses	(12.1)	(4.5)	(12.1)	(4.5)	$ (12.6)	(5.5)	$ (3.8)	$ (6.6)
Total finance receivables, net	182.7		182.7			194.0
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, gross	148.9		148.9			154.0
Allowance for credit losses	(10.9)	(3.0)	(10.9)	(3.0)	(11.4)	(4.0)	(2.3)	(5.7)
Sales-type leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, gross	45.9		45.9			45.5
Allowance for credit losses	(1.2)	$ (1.5)	(1.2)	$ (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	58.0		58.0			72.0
Other assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables, net	$ 125.0		$ 125.0			$ 122.0