Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Schedule of Investments in Affiliates (Detail) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates		$ 14	$ 35
Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage		50.00%
Hilton San Diego Bayfront [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage		25.00%
Investments in affiliates		$ 11	18
All others (6 hotels) [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates	[1]	$ 3	$ 17
All others (6 hotels) [Member] | Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage	[1]	20.00%
All others (6 hotels) [Member] | Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage	[1]	50.00%

[1] In November 2019, we disposed of our ownership interest in the Conrad Dublin. Refer to Note 3: “Acquisitions, Dispositions and Assets Held for Sale” for additional information.