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Finance Receivables - Schedule of Auto Loan and Lease Receivables (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total finance receivables | $ 3,348.7 | $ 2,256.9 |
Less: Allowance for finance receivable losses | (106.4) | (69.3) | $ (25.0)
Finance receivables, net | 3,242.3 | 2,187.6 |
Asset-backed term funding |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total finance receivables | 2,146.5 | 482.1 |
Warehouse facilities |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total finance receivables | 749.3 | 1,383.9 |
Other managed receivables |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total finance receivables | $ 452.9 | $ 390.9 |

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