Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2014
Jun. 30, 2014
Feb. 28, 2015
Entity Registrant Name Liberty TripAdvisor Holdings, Inc.    
Entity Central Index Key 0001606745    
Document Type 10-K    
Document Period End Date Dec. 31, 2014    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float   $ 0dei_EntityPublicFloat  
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Series A      
Entity Common Stock, Shares Outstanding     71,709,941dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Series B      
Entity Common Stock, Shares Outstanding     2,929,777dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember