Related Party Transactions - Joint venture Relationships (Details)	Dec. 31, 2023
Penske Truck Leasing Co LP | Corporate Joint Venture
Related party transactions
Ownership percentage	28.90%
Penske Commercial Leasing Australia | Corporate Joint Venture
Related party transactions
Ownership percentage	28.00%
Fairfield, Connecticut | Audi, Mercedes-Benz, Sprinter, Porsche
Related party transactions
Ownership percentage of consolidated entity	80.00%
Greenwich, Connecticut | Mercedes-Benz
Related party transactions
Ownership percentage of consolidated entity	80.00%
Northern Italy | BMW, MINI, Maserati, Porsche, Audi, Jaguar, Land Rover, Volvo, Mercedes-Benz, smart, Lamborghini
Related party transactions
Ownership percentage of consolidated entity	84.10%
Frankfurt, Germany | Lexus, Toyota, Volkswagen
Related party transactions
Ownership percentage	50.00%
Barcelona, Spain | BMW, MINI
Related party transactions
Ownership percentage	50.00%