v3.10.0.1
Document and Entity Information - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Jan. 25, 2019
Jun. 30, 2018
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol EXPE    
Entity Registrant Name EXPEDIA GROUP, INC.    
Entity Central Index Key 0001324424    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Emerging Growth Company false    
Entity Smaller Reporting Company false    
Entity Shell Company false    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 14,376,116
Common stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   134,390,305  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   12,799,999