Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Schedule of Investments in Affiliates (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates	$ 49	$ 50
Hilton San Diego Bayfront [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership Percentage	25.00%
Investments in affiliates	$ 18	19
All others (7 hotels) [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in affiliates	$ 31	$ 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%

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

No definition available.

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