Cover Page - shares
9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2019  
Entity File Number 001-37429  
Entity Registrant Name EXPEDIA GROUP, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-2705720  
Entity Address, Address Line One 1111 Expedia Group Way W.  
Entity Address, City or Town Seattle  
Entity Address, State or Province WA  
Entity Address, Postal Zip Code 98119  
City Area Code (206)  
Local Phone Number 481-7200  
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  
Entity Shell Company false  
Title of 12(b) Security Expedia Group, Inc. 2.500% Senior Notes due 2022  
Trading Symbol EXPE22  
Security Exchange Name NYSE  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001324424  
Current Fiscal Year End Date --12-31  
Common stock    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   139,362,820
Class B Common Stock    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   5,523,452
The Nasdaq Global Select Market    
Entity Information [Line Items]    
Title of 12(b) Security Common stock, $0.0001 par value  
Trading Symbol EXPE  
Security Exchange Name NASDAQ