| Document and Entity Information | Aug. 24, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | ASBURY AUTOMOTIVE GROUP INC |
| Amendment Flag | true |
| Entity Central Index Key | 0001144980 |
| Document Type | 8-K/A |
| Document Period End Date | Aug. 24, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-31262 |
| Entity Tax Identification Number | 01-0609375 |
| Entity Address, Address Line One | 2905 Premiere Parkway NW |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Duluth |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30097 |
| City Area Code | 770 |
| Local Phone Number | 418-8200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, Par Value $0.01 |
| Trading Symbol | ABG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | On August 24, 2020, Asbury Automotive Group, Inc. (the “Company”) filed a Current Report on Form 8-K (the “Initial Report”) with the Securities and Exchange Commission (the “SEC”) to report the completion of the acquisition by Asbury Automotive Group, LLC, a wholly owned subsidiary of the Company, of all of the assets of, and leases of the real property related to, 12 new vehicle dealership franchises (3 Mercedes-Benz, 3 Sprinter, 2 Lexus, 1 Jaguar, 1 Land Rover, 1 Porsche, and 1 Volvo), 2 collision centers and an auto auction comprising the Park Place Dealership group (collectively, the “Acquisition”) in accordance with the terms of the Asset Purchase Agreement (the “Asset Purchase Agreement”) entered into with certain members of the Park Place Dealership group, Park Place Mid-Cities, Ltd., a Texas limited partnership, and the identified principal. In order to comply with the financial statement requirements related to registration statements under the Securities Act of 1933, the Company hereby amends Item 9.01 of our Initial Report for the purpose of filing the financial statements of Park Place and the related pro forma financial information in accordance with Article 11 of Regulation S-X, which were not previously filed with the Initial Form 8-K and are permitted to be filed by amendment no later than 71 calendar days after the date the Initial Form 8-K was required to be filed with the SEC. |
