Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Impairments (Details)

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Goodwill and Other Intangible Assets - Impairments (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Impairments        
Goodwill impairments $ 18 $ 3 $ 300  
Hotel, Media & Platform        
Impairments        
Goodwill impairments     279  
Tripadvisor        
Impairments        
Accumulated goodwill impairment     1,571  
Tripadvisor | Hotel, Media & Platform | Goodwill        
Impairments        
Goodwill impairments     279  
Tripadvisor | Hotel, Media & Platform | Trademarks        
Impairments        
Impairment of intangible assets     $ 250 $ 288