Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Goodwill (Details)

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Goodwill and Other Intangible Assets - Goodwill (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
Goodwill        
Goodwill, beginning balance     $ 2,527 $ 2,443
Acquisitions       85
Goodwill impairment $ (18) $ (3) (300)  
Dispositions     (18)  
Other     31 (1)
Goodwill, ending balance     2,240 2,527
Tripadvisor        
Goodwill        
Goodwill, beginning balance       2,443
Allocation to new segments       (2,443)
Hotel, Media & Platform        
Goodwill        
Goodwill, beginning balance     1,923  
Allocation to new segments     6 1,923
Goodwill impairment     (279)  
Goodwill, ending balance     1,650 1,923
Experiences & Dining        
Goodwill        
Goodwill, beginning balance     333  
Allocation to new segments       250
Acquisitions       85
Other     29 (2)
Goodwill, ending balance     362 333
Corporate and other        
Goodwill        
Goodwill, beginning balance     271  
Allocation to new segments     (6) 270
Goodwill impairment     (21)  
Dispositions     (18)  
Other     2 1
Goodwill, ending balance     $ 228 $ 271