Description of Business and Summary of Significant Accounting Policies (Organization and Business, Inventory) (Details)	12 Months Ended
	Dec. 31, 2022 store franchises brand
Product Information [Line Items]
Owned and operated new vehicle franchises | franchises	343
Number of brands | brand	33
Percentage of new vehicle sales from core brands (percent)	89.00%
Dealerships [Member]
Product Information [Line Items]
Number of stores	247
Collision Center [Member]
Product Information [Line Items]
Number of stores	55
AutoNation USA Stores [Member]
Product Information [Line Items]
Number of stores	13
Automotive Auction Operations [Member]
Product Information [Line Items]
Number of stores	4
Parts Distribution Centers [Member]
Product Information [Line Items]
Number of stores	3