v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Document Documentand Entity Information [Abstract]    
Document Period End Date Mar. 31, 2019  
Document Type 10-Q  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol CAR  
Entity Registrant Name AVIS BUDGET GROUP, INC.  
Entity Central Index Key 0000723612  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   75,912,038