Related Party Transactions - Joint venture Relationships (Details)	1 Months Ended
	Oct. 31, 2024	Sep. 30, 2024	Dec. 31, 2024
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%
The Nix Group
Related party transactions
Equity ownership interest sold, percentage			50.00%
Join Venture In Kerpen, Germany
Related party transactions
Subsidiary, ownership percentage purchased		0.3333
BMW, MINI, Maserati, Porsche, Audi, Jaguar, Land Rover, Volvo, Mercedes-Benz, smart, Lamborghini
Related party transactions
Subsidiary, ownership percentage purchased	0.109
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			95.00%
Barcelona, Spain | BMW, MINI, Dongfeng, Xpeng
Related party transactions
Ownership percentage			50.00%