Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred Merchant Payables, Certain Risks and Concentrations, Earnings (Loss) per Common Share (Details)

v3.20.4
Summary of Significant Accounting Policies - Deferred Merchant Payables, Certain Risks and Concentrations, Earnings (Loss) per Common Share (Details)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
item
shares
Dec. 31, 2019
USD ($)
item
shares
Dec. 31, 2018
USD ($)
item
shares
Numerator      
Net earnings (loss) attributable to Liberty TripAdvisor Holdings, Inc. shareholders | $ $ (238) $ (22) $ (64)
Less: Preferred stock carrying value adjustment and transaction costs | $ 150    
Net earnings (loss) available to common shareholders | $ $ (388) $ (22) $ (64)
Denominator      
Basic EPS (In Shares) 75 75 74
Potentially dilutive shares (In Shares) 1    
Diluted EPS (In Shares) 76 75 74
Tripadvisor      
Product Information [Line Items]      
Deferred merchant payable | $ $ 36 $ 159  
Number of most significant travel partners | item 2 2 2
Tripadvisor | Expedia and Booking Holdings Inc. | Customer | Revenue      
Product Information [Line Items]      
Customer concentration (as a percent) 25.00% 33.00% 37.00%
Stock Options      
Earnings (Loss) Per Common Share (EPS)      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1 2 2
Preferred Stock Put Option      
Earnings (Loss) Per Common Share (EPS)      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 13