Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details)

v3.21.2
Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net $ 82 $ (1) $ 189 $ (1)
Fair Value, option, credit Risk, gains (losses) on assets     8  
TripCo Exchangeable Senior Debentures due 2051        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value, option, credit Risk, gains (losses) on assets     8  
Debt issuance costs     5  
TripCo Exchangeable Senior Debentures due 2051 | Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value, option, credit Risk, gains (losses) on assets 1      
TripCo Exchangeable Senior Debentures due 2051        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net 15   41  
Financial instrument liabilities        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net 66 $ (1) 147 (2)
Tripadvisor Foreign Currency Forward Contracts        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net $ 1   $ 1 $ 1