v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Entity Registrant Name Liberty TripAdvisor Holdings, Inc.  
Entity Central Index Key 0001606745  
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Series A    
Entity Common Stock, Shares Outstanding   72,146,830
Series B    
Entity Common Stock, Shares Outstanding   2,929,777