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ACCOUNTS RECEIVABLE - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | $ 1,245.5 | $ 1,130.2
Less: Allowance for doubtful accounts | (2.6) | (7.1)
Total accounts receivable, net | 1,242.9 | 1,123.1
Contracts in transit |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | 534.9 | 559.7
Trade receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | 177.3 | 153.3
Vehicle receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | 272.8 | 191.4
Manufacturer receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | 248.9 | 216.5
Other receivables, current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, before allowance for credit loss | $ 11.6 | $ 9.3

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