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FINANCE RECEIVABLES - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total finance receivables | $ 2,979.5 | $ 2,256.9
Automobile Loan |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Current year | 1,033.0 | 1,661.0
Fiscal year before current fiscal year | 1,420.7 | 393.1
Two years before current fiscal year | 314.0 | 46.5
Three years before current fiscal year | 35.6 |
Total finance receivables | 2,803.3 | 2,100.6
Other Finance Receivables |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total finance receivables | 176.2 | 156.3
Less than 599 | Automobile Loan |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Current year | 40.5 | 63.0
Fiscal year before current fiscal year | 51.6 | 30.3
Two years before current fiscal year | 23.3 | 4.8
Three years before current fiscal year | 3.6 |
Total finance receivables | 119.0 | 98.1
FICO Score, 600 to 699 | Automobile Loan |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Current year | 356.3 | 652.6
Fiscal year before current fiscal year | 558.2 | 243.4
Two years before current fiscal year | 194.7 | 27.2
Three years before current fiscal year | 20.7 |
Total finance receivables | 1,129.9 | 923.2
FICO Score, 700 to 774 | Automobile Loan |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Current year | 342.1 | 575.9
Fiscal year before current fiscal year | 499.6 | 97.9
Two years before current fiscal year | 78.5 | 10.0
Three years before current fiscal year | 7.7 |
Total finance receivables | 927.9 | 683.8
FICO Score, Greater than 775 | Automobile Loan |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Current year | 294.1 | 369.5
Fiscal year before current fiscal year | 311.3 | 21.5
Two years before current fiscal year | 17.5 | 4.5
Three years before current fiscal year | 3.6 |
Total finance receivables | $ 626.5 | $ 395.5

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