DEBT - Schedule of Non-Recourse Notes Payable (Details) - USD ($) $ in Millions | 9 Months Ended |
Sep. 30, 2023 | Sep. 30, 2022 |
Debt Instrument [Line Items] | | |
Proceeds from issuance of non-recourse notes payable | $ 1,451.7 | $ 298.2 |
Non-recourse | Asset Backed Funding Vehicles | | |
Debt Instrument [Line Items] | | |
Proceeds from issuance of non-recourse notes payable | 1,500 | |
Non-recourse notes payable | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | 1,469.9 | |
Aggregate principal amount | 2,094.2 | |
Non-recourse notes payable | LAD Auto Receivables Trust 2021-1 Class A | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | 52.6 | |
Aggregate principal amount | $ 282.8 | |
Stated interest rate | 1.30% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2021-1 Class B | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 18.3 | |
Aggregate principal amount | $ 18.3 | |
Stated interest rate | 1.94% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2021-1 Class C | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 26 | |
Aggregate principal amount | $ 26 | |
Stated interest rate | 2.35% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2021-1 Class D | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 17.2 | |
Aggregate principal amount | $ 17.2 | |
Stated interest rate | 3.99% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2022-1 Class A | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 132.7 | |
Aggregate principal amount | $ 259.7 | |
Stated interest rate | 5.21% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2022-1 Class B | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 15.5 | |
Aggregate principal amount | $ 15.5 | |
Stated interest rate | 5.87% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2022-1 Class C | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 23 | |
Aggregate principal amount | $ 23 | |
Stated interest rate | 6.85% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class A-1 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 0 | |
Aggregate principal amount | $ 75.1 | |
Stated interest rate | 4.929% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class A-2 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 191.4 | |
Aggregate principal amount | $ 242 | |
Stated interest rate | 5.68% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class A-3 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 74.4 | |
Aggregate principal amount | $ 74.4 | |
Stated interest rate | 5.48% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class B | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 20.1 | |
Aggregate principal amount | $ 20.1 | |
Stated interest rate | 5.59% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class C | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 36.7 | |
Aggregate principal amount | $ 36.7 | |
Stated interest rate | 6.18% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-1 Class D | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 31.3 | |
Aggregate principal amount | $ 31.3 | |
Stated interest rate | 7.30% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class A-1 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 0 | |
Aggregate principal amount | $ 87.4 | |
Stated interest rate | 5.44% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class A-2 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 262.2 | |
Aggregate principal amount | $ 287 | |
Stated interest rate | 5.93% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class A-3 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 80 | |
Aggregate principal amount | $ 80 | |
Stated interest rate | 5.42% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class B | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 22.9 | |
Aggregate principal amount | $ 22.9 | |
Stated interest rate | 5.45% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class C | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 54.7 | |
Aggregate principal amount | $ 54.7 | |
Stated interest rate | 5.58% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-2 Class D | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 24.8 | |
Aggregate principal amount | $ 24.8 | |
Stated interest rate | 6.30% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class A-1 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 34 | |
Aggregate principal amount | $ 63.2 | |
Stated interest rate | 5.632% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class A-2 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 127.8 | |
Aggregate principal amount | $ 127.8 | |
Stated interest rate | 6.09% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class A-3 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 100 | |
Aggregate principal amount | $ 100 | |
Stated interest rate | 6.12% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class A-4 | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 45 | |
Aggregate principal amount | $ 45 | |
Stated interest rate | 5.95% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class B | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 22.6 | |
Aggregate principal amount | $ 22.6 | |
Stated interest rate | 6.09% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class C | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 39.9 | |
Aggregate principal amount | $ 39.9 | |
Stated interest rate | 6.43% | |
Non-recourse notes payable | LAD Auto Receivables Trust 2023-3 Class D | Non-recourse | | |
Debt Instrument [Line Items] | | |
Long-term debt | $ 16.8 | |
Aggregate principal amount | $ 16.8 | |
Stated interest rate | 6.92% | |