Business Combinations - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) franchise	Dec. 31, 2024 dealership franchise
Italian Retail Automotive Franchise
Business Combination, Separately Recognized Transaction [Line Items]
Revenue from date of acquisition of companies acquired | $	$ 14.1
Pre-tax income from date of acquisition of companies acquired | $	$ 0.4
Italy | Retail automotive dealership
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired	1
Italy | Retail automotive dealership | Franchised Dealerships
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired		2
U.K. | Retail automotive dealership | Franchised Dealerships
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired		16
Australia | Retail automotive dealership | Franchised Dealerships
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired		3
Australia | Retail automotive dealership | Used Vehicle Dealerships
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired		1
U.S. | Retail automotive dealership | Ford
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired		1
U.S. | Retail commercial truck dealership | Franchised Dealerships | Full-Service Dealership
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired | dealership		3
U.S. | Retail commercial truck dealership | Franchised Dealerships | Collision Center
Business Combination, Separately Recognized Transaction [Line Items]
Number of franchises acquired | dealership		2