Business And Credit Concentrations	9 Months Ended
Sep. 30, 2017
Risks and Uncertainties [Abstract]
Business And Credit Concentrations	BUSINESS AND CREDIT CONCENTRATIONS We own and operate franchised automotive stores in the United States pursuant to franchise agreements with vehicle manufacturers. We are subject to a concentration of risk in the event of financial distress of or other adverse event related to a major vehicle manufacturer or related lender or supplier. The core brands of vehicles that we sell, representing approximately 93% of the new vehicles sold during the nine months ended September 30, 2017, are manufactured by Toyota (including Lexus), Honda, Ford, General Motors, FCA US, Mercedes-Benz, Nissan, BMW, and Volkswagen (including Audi and Porsche). Our business could be materially adversely impacted by a bankruptcy of or other adverse event related to a major vehicle manufacturer or related lender or supplier. We had receivables from manufacturers or distributors of $222.9 million at September 30, 2017, and $234.9 million at December 31, 2016. Additionally, a large portion of our Contracts-in-Transit included in Receivables, Net, in the accompanying Unaudited Condensed Consolidated Balance Sheets, are due from automotive manufacturers’ captive finance subsidiaries, which provide financing directly to our new and used vehicle customers. Concentrations of credit risk with respect to non-manufacturer trade receivables are limited due to the wide variety of customers and markets in which our products are sold as well as their dispersion across many different geographic areas in the United States. Consequently, at September 30, 2017, we do not consider AutoNation to have any significant non-manufacturer concentrations of credit risk. During the nine months ended September 30, 2017, approximately 62% of our total retail new vehicle unit sales was generated by our stores in Florida, Texas, and California. During the third quarter of 2017, certain stores in our Texas and Florida markets were impacted by Hurricanes Harvey and Irma, respectively. We incurred approximately $3 million of unrecovered hurricane-related losses associated with flooded vehicles and minor property damage sustained at multiple locations.

BUSINESS AND CREDIT CONCENTRATIONS

We own and operate franchised automotive stores in the United States pursuant to franchise agreements with vehicle manufacturers. We are subject to a concentration of risk in the event of financial distress of or other adverse event related to a major vehicle manufacturer or related lender or supplier. The core brands of vehicles that we sell, representing approximately 93% of the new vehicles sold during the nine months ended September 30, 2017, are manufactured by Toyota (including Lexus), Honda, Ford, General Motors, FCA US, Mercedes-Benz, Nissan, BMW, and Volkswagen (including Audi and Porsche). Our business could be materially adversely impacted by a bankruptcy of or other adverse event related to a major vehicle manufacturer or related lender or supplier.

We had receivables from manufacturers or distributors of $222.9 million at September 30, 2017, and $234.9 million at December 31, 2016. Additionally, a large portion of our Contracts-in-Transit included in Receivables, Net, in the accompanying Unaudited Condensed Consolidated Balance Sheets, are due from automotive manufacturers’ captive finance subsidiaries, which provide financing directly to our new and used vehicle customers. Concentrations of credit risk with respect to non-manufacturer trade receivables are limited due to the wide variety of customers and markets in which our products are sold as well as their dispersion across many different geographic areas in the United States. Consequently, at September 30, 2017, we do not consider AutoNation to have any significant non-manufacturer concentrations of credit risk.

During the nine months ended September 30, 2017, approximately 62% of our total retail new vehicle unit sales was generated by our stores in Florida, Texas, and California. During the third quarter of 2017, certain stores in our Texas and Florida markets were impacted by Hurricanes Harvey and Irma, respectively. We incurred approximately $3 million of unrecovered hurricane-related losses associated with flooded vehicles and minor property damage sustained at multiple locations.