Goodwill - Summary of Goodwill Activity by Reportable Segments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Line Items]
Balance as of December 31, 2019	$ 840
Balance as of June 30, 2020	837
Operating Segments
Goodwill [Line Items]
Balance as of December 31, 2019	840
Disposition	(6)
Other adjustments	3
Balance as of June 30, 2020	837
Operating Segments | Hotels, Media & Platform
Goodwill [Line Items]
Balance as of December 31, 2019	405
Re-allocation of goodwill	2
Balance as of June 30, 2020	407
Operating Segments | Experiences & Dining Segment
Goodwill [Line Items]
Balance as of December 31, 2019	333
Other adjustments	6
Balance as of June 30, 2020	339
Operating Segments | Other
Goodwill [Line Items]
Balance as of December 31, 2019	102
Re-allocation of goodwill	(2)
Disposition	(6)
Other adjustments	(3)
Balance as of June 30, 2020	$ 91