Business Combinations (Narrative) (Details)	9 Months Ended
	Sep. 30, 2022 dealership franchise	Sep. 30, 2021 dealership franchise
Retail commercial truck dealership | TEAM Truck Centres
Business Acquisition [Line Items]
Number of full service dealerships acquired	4
Retail commercial truck dealership | KCFL
Business Acquisition [Line Items]
Number of full service dealerships acquired		4
Number of parts and service centers acquired		4
Number of collision centers acquired		2
U.S. | Retail automotive dealership
Business Acquisition [Line Items]
Number of acquired franchises | franchise	4	1
United States And United Kingdom | Retail automotive dealership
Business Acquisition [Line Items]
Number of acquired franchises | franchise	19
U.K. | Retail automotive dealership
Business Acquisition [Line Items]
Number of acquired franchises | franchise	15