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Accounts Receivable - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | $ 1,529.9 | $ 720.9 |
Less: Allowance for doubtful accounts | (17.3) | (5.9) |
Less: Long-term portion of accounts receivable, net | (602.6) | (101.0) |
Total accounts receivable, net | 910.0 | 614.0 | $ 505.0
Contracts in transit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | 304.9 | 286.8 |
Trade receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | 125.5 | 67.0 |
Vehicle receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | 106.6 | 61.8 |
Manufacturer receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | 120.5 | 118.1 |
Auto loan and lease receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | 829.2 | 175.6 |
Less: Allowance for doubtful accounts | (25.0) | (12.9) | $ (12.4)
Less: Long-term portion of accounts receivable, net | (579.7) | (84.1) |
Total accounts receivable, net | 224.5 | 78.6 |
Other receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts receivable gross | $ 43.2 | $ 11.6 |

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