v3.8.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2018
Apr. 13, 2018
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Trading Symbol EXPE  
Entity Registrant Name EXPEDIA GROUP, INC.  
Entity Central Index Key 0001324424  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   137,514,137
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   12,799,999