Annual report pursuant to Section 13 and 15(d)

Acquisitions and Dispositions (Details)

v3.10.0.1
Acquisitions and Dispositions (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
item
Dec. 31, 2016
USD ($)
item
Dec. 31, 2017
USD ($)
Acquisitions      
Goodwill $ 2,443 $ 3,694 $ 2,445
TripAdvisor | 2018 Acquisitions      
TripAdvisor, Inc. transactions      
Cash consideration for acquisition $ 23    
Acquisitions      
Number of businesses acquired | item 1    
Goodwill $ 11    
Intangible assets 14    
Deferred tax liabilities, net (2)    
Total purchase price consideration $ 23    
Definite-lived intangible assets weighted-average life 8 years    
TripAdvisor | 2018 Acquisitions | Customer relationships      
Acquisitions      
Intangible assets $ 6    
TripAdvisor | 2018 Acquisitions | Technology-Based Intangible Assets      
Acquisitions      
Intangible assets $ 8    
TripAdvisor | 2016 Acquisitions      
TripAdvisor, Inc. transactions      
Acquisition purchase price   34  
Cash consideration for acquisition   29  
Cash Acquired from Acquisition   4  
Business Combination, Contingent Consideration, Liability   $ 1  
Acquisitions      
Number of businesses acquired | item   5  
Goodwill   $ 17  
Intangible assets   25  
Net liabilities assumed   (8)  
Total purchase price consideration   $ 34  
Definite-lived intangible assets weighted-average life   6 years  
TripAdvisor | 2016 Acquisitions | Trade Names      
Acquisitions      
Intangible assets   $ 4  
TripAdvisor | 2016 Acquisitions | Customer Lists and Relationships      
Acquisitions      
Intangible assets   4  
TripAdvisor | 2016 Acquisitions | Subscriber Relationships      
Acquisitions      
Intangible assets   5  
TripAdvisor | 2016 Acquisitions | Technology-Based Intangible Assets      
Acquisitions      
Intangible assets   $ 12