FINANCE RECEIVABLES - Allowance for Credit Losses on Finance Receivables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 6.3	$ 7.3	$ 3.0
Provision for credit losses	0.7	0.0	4.3
Charge offs	(0.4)	(1.0)	0.0
Recoveries	0.0	0.0	0.0
Ending balance	6.6	6.3	7.3
Commercial Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	5.9	6.5	1.9
Provision for credit losses	0.2	0.2	4.6
Charge offs	(0.4)	(0.8)	0.0
Recoveries	0.0	0.0	0.0
Ending balance	5.7	5.9	6.5
Sales-Type Leases
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	0.4	0.8	1.1
Provision for credit losses	0.5	(0.2)	(0.3)
Charge offs	0.0	(0.2)	0.0
Recoveries	0.0	0.0	0.0
Ending balance	$ 0.9	$ 0.4	$ 0.8