Consolidated Variable Interest Entities and Investments in Affiliates - Schedule of Investments in Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates	$ 84	$ 81
Hilton Berlin [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage	40.00%
Investments in affiliates	$ 33	31
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	$ 31	$ 30
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%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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