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Consolidated Variable Interest Entities and Investments in Affiliates - Schedule of Investments in Affiliates (Detail) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Schedule Of Equity Method Investments [Line Items]    
Investments in affiliates $ 53 $ 84
Hilton Berlin [Member]    
Schedule Of Equity Method Investments [Line Items]    
Ownership Percentage [1] 40.00%  
Investments in affiliates [1]   33
Hilton San Diego Bayfront [Member]    
Schedule Of Equity Method Investments [Line Items]    
Ownership Percentage 25.00%  
Investments in affiliates $ 20 20
All others (7 hotels) [Member]    
Schedule Of Equity Method Investments [Line Items]    
Investments in affiliates $ 33 $ 31
All others (7 hotels) [Member] | Minimum [Member]    
Schedule Of Equity Method Investments [Line Items]    
Ownership Percentage 20.00%  
All others (7 hotels) [Member] | Maximum [Member]    
Schedule Of Equity Method Investments [Line Items]    
Ownership Percentage 50.00%  
[1] Disposed of in May 2018. Refer to Note 3: “Dispositions” for additional information.