Interim Financial Statements - Business Overview (Details)	3 Months Ended
	Mar. 31, 2025 franchise location state dealership
Retail automotive dealership
Interim Financial Statements [Line Items]
Total number of owned and operated franchises | franchise	352
Retail automotive dealership | Outside the U.S.
Interim Financial Statements [Line Items]
Number of owned and operated franchises outside US | franchise	205
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	16
Retail automotive dealership | U.S.
Interim Financial Statements [Line Items]
Number of owned and operated franchises in US | franchise	147
Number of retail locations operated | dealership	6
Number of retail automotive franchises sold | franchise	1
Retail automotive dealership | U.K.
Interim Financial Statements [Line Items]
Number of retail locations operated | dealership	9
Retail automotive dealership | AUSTRALIA
Interim Financial Statements [Line Items]
Number of retail locations operated | dealership	1
Retail commercial truck dealership
Interim Financial Statements [Line Items]
Number of operating locations | location	45
Retail commercial truck dealership | U.S. and Ontario, Canada
Interim Financial Statements [Line Items]
Number of states with dealerships | state	10
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%