FINANCE RECEIVABLES - Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	$ 21.8	$ 87.4
Originated in prior fiscal year	53.7	64.3
Originated two years before current fiscal year	45.1	8.0
Originated three years before current fiscal year	4.3	4.6
Originated four years before current fiscal year	3.9	1.9
Prior	1.0	0.0
Total finance receivables	129.8	166.2
Superior
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	0.0	1.7
Originated in prior fiscal year	0.0	0.0
Originated two years before current fiscal year	0.0	0.0
Originated three years before current fiscal year	0.0	0.0
Originated four years before current fiscal year	0.0	0.0
Prior	0.0	0.0
Total finance receivables	0.0	1.7
Above Average
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	5.1	12.6
Originated in prior fiscal year	2.1	3.0
Originated two years before current fiscal year	2.6	0.0
Originated three years before current fiscal year	0.0	0.0
Originated four years before current fiscal year	0.0	1.7
Prior	1.0	0.0
Total finance receivables	10.8	17.3
Average
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	15.1	20.8
Originated in prior fiscal year	27.0	17.1
Originated two years before current fiscal year	23.6	3.4
Originated three years before current fiscal year	2.7	0.7
Originated four years before current fiscal year	0.0	0.1
Prior	0.0	0.0
Total finance receivables	68.4	42.1
Below Average
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	1.6	44.6
Originated in prior fiscal year	16.2	43.1
Originated two years before current fiscal year	18.7	4.6
Originated three years before current fiscal year	1.6	3.9
Originated four years before current fiscal year	3.9	0.0
Prior	0.0	0.0
Total finance receivables	42.0	96.2
Sub Standard
Financing Receivable, Recorded Investment [Line Items]
Originated in current fiscal year	0.0	7.7
Originated in prior fiscal year	8.4	1.1
Originated two years before current fiscal year	0.2	0.0
Originated three years before current fiscal year	0.0	0.0
Originated four years before current fiscal year	0.0	0.1
Prior	0.0	0.0
Total finance receivables	$ 8.6	$ 8.9