Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Schedule of Investments in Affiliates (Detail) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates		$ 14	$ 14
Hilton San Diego Bayfront [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage		25.00%
Investments in affiliates		$ 11	11
All others (6 hotels) [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates	[1]	$ 3	$ 3
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] The ground lease for the Embassy Suites Secaucus Meadowlands expired on October 31, 2021 and the property was turned over to the ground lessor on that date.