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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 24, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-31262    
Entity Registrant Name ASBURY AUTOMOTIVE GROUP, INC    
Entity Incorporation, State or Country Code DE    
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    
Title of 12(b) Security Common stock, $0.01 par value per share    
Trading Symbol ABG    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 4,520
Entity Common Stock, Shares Outstanding   19,645,447  
Documents Incorporated by Reference
List hereunder the following documents if incorporated by reference and the Part of the Form 10-K into which the document is incorporated:
Portions of the registrant's definitive Proxy Statement for the 2025 Annual Meeting of Stockholders, to be filed within 120 days after the end of the registrant's fiscal year, are incorporated by reference into Part III, Items 10 through 14 of this Annual Report on Form 10-K.
    
Entity Central Index Key 0001144980    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false