FINANCE RECEIVABLES - Allowance for Credit Losses and Finance Receivables by Portfolio (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for credit losses, ending balance:
Individually evaluated for impairment	$ 0.6	$ 2.4
Collectively evaluated for impairment	4.9	4.2
Total allowance for credit losses	5.5	6.6	$ 6.3	$ 7.3
Finance receivables, ending balance:
Individually evaluated for impairment	1.5	6.0
Collectively evaluated for impairment	199.2	200.7
Total finance receivables	200.7	206.7
Commercial Loans
Allowance for credit losses, ending balance:
Individually evaluated for impairment	0.6	2.4
Collectively evaluated for impairment	3.4	3.3
Total allowance for credit losses	4.0	5.7	5.9	6.5
Finance receivables, ending balance:
Individually evaluated for impairment	1.5	6.0
Collectively evaluated for impairment	152.6	168.7
Total finance receivables	154.1	174.7
Sales-Type Leases
Allowance for credit losses, ending balance:
Individually evaluated for impairment	0.0	0.0
Collectively evaluated for impairment	1.5	0.9
Total allowance for credit losses	1.5	0.9	$ 0.4	$ 0.8
Finance receivables, ending balance:
Individually evaluated for impairment	0.0	0.0
Collectively evaluated for impairment	46.6	32.0
Total finance receivables	$ 46.6	$ 32.0