Annual report pursuant to Section 13 and 15(d)

Cover

v3.21.1
Cover - USD ($)
$ in Millions
Dec. 31, 2020
Jan. 31, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K/A    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2020    
Current Fiscal Year End Date --12-31    
Entity File Number 001-36603    
Entity Registrant Name LIBERTY TRIPADVISOR HOLDINGS, INC.    
Entity Central Index Key 0001606745    
Entity Tax Identification Number 46-3337365    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 12300 Liberty Boulevard    
Entity Address, City or Town Englewood    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80112    
City Area Code 720    
Local Phone Number 875-5200    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 153
ICFR Auditor Attestation Flag true    
Common Class A [Member]      
Document Information [Line Items]      
Title of 12(b) Security Series A Common Stock    
Trading Symbol LTRPA    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   72,227,256  
Common Class B [Member]      
Document Information [Line Items]      
Title of 12(b) Security Series B Common Stock    
Trading Symbol LTRPB    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   2,973,665