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Accounts Receivable - Breakdown of Current and Long Term Portions of Auto Loan and Lease Receivables (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Current portion of auto loan and lease receivables, net of allowance of $15.5 and $13.6 | $ 923.8 | $ 910.0 | $ 910.0
Long term portion of auto loan and lease receivables, net of allowance of $13.9 and $11.4 | 875.2 |  | $ 602.6
Accounts receivable, allowance for doubtful accounts, current | 18.7 | 17.3 |
Auto loan and lease receivables |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Current portion of auto loan and lease receivables, net of allowance of $15.5 and $13.6 | 157.2 | 224.5 |
Long term portion of auto loan and lease receivables, net of allowance of $13.9 and $11.4 | 849.8 | 579.7 |
Auto loan and lease receivables, net | 1,007.0 | 804.2 |
Accounts receivable, allowance for doubtful accounts, current | 15.5 | 13.6 |
Accounts receivable, allowance for doubtful accounts, noncurrent | $ 13.9 | $ 11.4 |

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