XML 73 R61.htm IDEA: XBRL DOCUMENT v3.21.2
Segment Information - Summary of Segment Information (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Segment Reporting Information [Line Items]        
General and administrative [1] $ 46 $ 43 $ 84 $ 94
Reportable Segments | Hotels, Media & Platform        
Segment Reporting Information [Line Items]        
General and administrative 20 16 36 34
Advertising expense $ 1 $ 1 $ 2 $ 5
[1] Includes stock-based compensation expense as follows (Note 9):