Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Subsidiary Purchases of Common Stock (Details)

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Stockholders' Equity - Subsidiary Purchases of Common Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Nov. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 31, 2018
Jan. 25, 2017
Equity, Class of Treasury Stock [Line Items]            
Payment for shares repurchased   $ 60 $ 100 $ 250    
Dividends received $ 108          
Tripadvisor            
Equity, Class of Treasury Stock [Line Items]            
Dividend declared per share $ 3.50          
Dividends $ 488          
Tripadvisor | 2017 Stock Repurchase Program            
Equity, Class of Treasury Stock [Line Items]            
Stock repurchase program authorized amount           $ 250
Treasury shares acquired       6,079,003    
Payment for shares repurchased       $ 250    
Tripadvisor | 2018 Stock Repurchase Program            
Equity, Class of Treasury Stock [Line Items]            
Stock repurchase program authorized amount         $ 250  
Treasury shares acquired   2,059,846 2,582,198      
Payment for shares repurchased   $ 60 $ 100      
Additional amount authorized 100          
Stock repurchase remaining amount authorized $ 250 $ 190