Business Combinations - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($) franchise dealership	Sep. 30, 2024 franchise
Italian Retail Automotive Franchise
Business Combination [Line Items]
Business combination, revenue | $	$ 7.0
Business combination, pre-tax income | $	$ 0.3
ITALY | Retail automotive dealership
Business Combination [Line Items]
Number of franchises acquired	1
ITALY | Retail automotive dealership | Franchised Dealerships
Business Combination [Line Items]
Number of franchises acquired		2
U.K. | Retail automotive dealership | Franchised Dealerships
Business Combination [Line Items]
Number of franchises acquired		16
AUSTRALIA | Retail automotive dealership | Franchised Dealerships
Business Combination [Line Items]
Number of franchises acquired		2
AUSTRALIA | Retail automotive dealership | Used Vehicle Dealerships
Business Combination [Line Items]
Number of franchises acquired		1
U.S. | Retail automotive dealership | Ford
Business Combination [Line Items]
Number of franchises acquired		1
U.S. | Retail commercial truck dealership | Franchised Dealerships | Full-Service Dealership
Business Combination [Line Items]
Number of franchises acquired | dealership	3
U.S. | Retail commercial truck dealership | Franchised Dealerships | Collision Center
Business Combination [Line Items]
Number of franchises acquired | dealership	2