Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Details)

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Goodwill and Other Intangible Assets (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill      
Goodwill, beginning balance $ 2,445,000,000 $ 3,694,000,000  
Acquisition 11,000,000    
Impairment   (1,271,000,000)  
Other (13,000,000) 22,000,000  
Goodwill, ending balance 2,443,000,000 2,445,000,000 $ 3,694,000,000
Intangible Assets subject to amortization      
Gross carrying amount 1,473,000,000 1,450,000,000  
Accumulated amortization (1,162,000,000) (1,068,000,000)  
Net carrying amount 311,000,000 382,000,000  
Amortization expense 137,000,000 188,000,000 198,000,000
Future amortization expense      
2019 91,000,000    
2020 86,000,000    
2021 70,000,000    
2022 28,000,000    
2023 $ 27,000,000    
Impairments      
Impairment expense   1,798,000,000  
Customer relationships      
Intangible Assets subject to amortization      
Weighted Average Remaining Useful Life 3 years    
Gross carrying amount $ 885,000,000 908,000,000  
Accumulated amortization (761,000,000) (735,000,000)  
Net carrying amount $ 124,000,000 173,000,000  
Other      
Intangible Assets subject to amortization      
Weighted Average Remaining Useful Life 4 years    
Gross carrying amount $ 588,000,000 542,000,000  
Accumulated amortization (401,000,000) (333,000,000)  
Net carrying amount 187,000,000 209,000,000  
TripAdvisor      
Goodwill      
Goodwill, beginning balance 2,445,000,000 3,694,000,000  
Acquisition 11,000,000    
Impairment   (1,271,000,000)  
Other (13,000,000) 22,000,000  
Goodwill, ending balance 2,443,000,000 2,445,000,000 $ 3,694,000,000
Impairments      
Goodwill, Impaired, Accumulated Impairment Loss $ 1,271,000,000    
TripAdvisor | Trademarks      
Impairments      
Impairment of Intangible Assets (Excluding Goodwill)   $ 527,000,000