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Interim Financial Statements - Business Overview (Details) | 1 Months Ended | 3 Months Ended
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Apr. 30, 2024 dealership | Mar. 31, 2024 franchise dealership state location | Mar. 31, 2023 franchise
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired |  |  | 0
Retail automotive dealership |  |  |
Interim Financial Statements [Line Items] |  |  |
Total number of owned and operated franchises |  | 360 |
Retail automotive dealership | Outside the U.S. |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of owned and operated franchises outside US |  | 208 |
Retail automotive dealership | U.S. and U.K. |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of stand-alone used vehicle dealerships operated in United States and United Kingdom | dealership |  | 18 |
Retail automotive dealership | U.S. |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of owned and operated franchises in US |  | 152 |
Number of retail locations operated | dealership |  | 6 |
Retail automotive dealership | U.S. | Franchised Dealerships | Ford |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired | dealership |  | 1 |
Retail automotive dealership | U.S. | Franchised Dealerships | Chrysler, Jeep, Dodge, Ram |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired | dealership |  | 1 |
Retail automotive dealership | U.S. | CarShop Used Vehicle Dealerships |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of locations closed |  | 1 |
Retail automotive dealership | U.K. |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of retail locations operated | dealership |  | 12 |
Retail automotive dealership | U.K. | Franchised Dealerships |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired |  | 16 |
Number of franchises opened |  | 1 |
Retail automotive dealership | ITALY | Franchised Dealerships |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired |  | 2 |
Retail automotive dealership | AUSTRALIA | Franchised Dealerships | Porsche | Subsequent Event |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired | dealership | 2 |  |
Retail automotive dealership | AUSTRALIA | Franchised Dealerships | Ducati Motorcycle | Subsequent Event |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of franchises acquired | dealership | 1 |  |
Retail commercial truck dealership |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of operating locations | location |  | 43 |
Retail commercial truck dealership | U.S. and Ontario, Canada |  |  |
Interim Financial Statements [Line Items] |  |  |
Number of states with dealerships | state |  | 9 |
Penske Truck Leasing Co L P | Penske Corporation |  |  |
Interim Financial Statements [Line Items] |  |  |
Penske transportation solutions, ownership percentage |  | 41.10% |
Penske Truck Leasing Co L P | Mitsui and Co |  |  |
Interim Financial Statements [Line Items] |  |  |
Penske transportation solutions, ownership percentage |  | 30.00% |
Penske Truck Leasing Co L P |  |  |
Interim Financial Statements [Line Items] |  |  |
Penske transportation solutions, ownership percentage |  | 28.90% |

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