Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Future Amortization Expense (Details)

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Goodwill and Other Intangible Assets - Future Amortization Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Future amortization expense      
2020 $ 92    
2021 77    
2022 35    
2023 32    
2024 29    
Tripadvisor      
Impairments      
Impairment of intangible assets   $ 0  
Goodwill impairment     $ 1,271
Accumulated goodwill impairment 1,271    
Tripadvisor | Trademarks      
Impairments      
Impairment of intangible assets $ 288   $ 527