FINANCE RECEIVABLES - Allowance for Credit Losses and Finance Receivables by Portfolio (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for credit losses, ending balance:
Individually evaluated for impairment	$ 10.9	$ 7.8
Collectively evaluated for impairment	2.9	3.2
Total allowance for credit losses	13.8	11.0	$ 5.5	$ 6.6
Finance receivables, ending balance:
Individually evaluated for impairment	22.0	7.8
Collectively evaluated for impairment	107.8	158.4
Total finance receivables	129.8	166.2
Commercial Loans
Allowance for credit losses, ending balance:
Individually evaluated for impairment	10.9	7.8
Collectively evaluated for impairment	2.9	2.7
Total allowance for credit losses	13.8	10.5	4.0	5.7
Finance receivables, ending balance:
Individually evaluated for impairment	22.0	7.8
Collectively evaluated for impairment	96.2	137.9
Total finance receivables	118.2	145.7
Sales-Type Leases
Allowance for credit losses, ending balance:
Individually evaluated for impairment	0.0	0.0
Collectively evaluated for impairment	0.0	0.5
Total allowance for credit losses	0.0	0.5	$ 1.5	$ 0.9
Finance receivables, ending balance:
Individually evaluated for impairment	0.0	0.0
Collectively evaluated for impairment	11.6	20.5
Total finance receivables	$ 11.6	$ 20.5