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Interim Financial Statements - Business Overview (Details) | 3 Months Ended | 9 Months Ended
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Jun. 30, 2024 franchise | Sep. 30, 2024 dealership franchise state location
Retail automotive dealership |  |
Interim Financial Statements [Line Items] |  |
Total number of owned and operated franchises | franchise |  | 360
Retail automotive dealership | Outside the U.S. |  |
Interim Financial Statements [Line Items] |  |
Number of owned and operated franchises outside US | franchise |  | 211
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 |  | 16
Retail automotive dealership | U.S. |  |
Interim Financial Statements [Line Items] |  |
Number of owned and operated franchises in US | franchise |  | 149
Number of retail locations operated |  | 6
Retail automotive dealership | U.S. | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise |  | 2
Retail automotive dealership | U.S. | Franchised Dealerships | Ford |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise |  | 2
Retail automotive dealership | U.S. | Franchised Dealerships | Chrysler, Jeep, Dodge, Ram |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired |  | 1
Number of locations closed |  | 1
Retail automotive dealership | U.S. | Franchised Dealerships | Jaguar |  |
Interim Financial Statements [Line Items] |  |
Number of locations closed | franchise |  | 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 |  | 9
Retail automotive dealership | U.K. | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise |  | 16
Number of franchises opened | franchise |  | 1
Retail automotive dealership | U.K. | CarShop Used Vehicle Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of locations closed |  | 1
Number of locations sold |  | 2
Retail automotive dealership | AUSTRALIA |  |
Interim Financial Statements [Line Items] |  |
Number of retail locations operated |  | 1
Retail automotive dealership | AUSTRALIA | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise |  | 2
Retail automotive dealership | AUSTRALIA | Franchised Dealerships | Porsche |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise | 2 |
Retail automotive dealership | AUSTRALIA | CarShop Used Vehicle Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired |  | 1
Retail automotive dealership | ITALY | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired | franchise |  | 2
Retail automotive dealership | GERMANY | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of franchises opened | franchise |  | 1
Retail commercial truck dealership |  |
Interim Financial Statements [Line Items] |  |
Number of operating locations | location |  | 46
Retail commercial truck dealership | U.S. | Franchised Dealerships |  |
Interim Financial Statements [Line Items] |  |
Number of locations closed |  | 2
Retail commercial truck dealership | U.S. | Franchised Dealerships | Full-Service Dealership |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired |  | 3
Retail commercial truck dealership | U.S. | Franchised Dealerships | Collision Center |  |
Interim Financial Statements [Line Items] |  |
Number of franchises acquired |  | 2
Retail commercial truck dealership | U.S. and Ontario, Canada |  |
Interim Financial Statements [Line Items] |  |
Number of states with dealerships | state |  | 11
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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