Organization - Additional Information (Detail)	Sep. 30, 2017 Hotel Fund Country JointVenture
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of hotels	94
European Joint Venture
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of funds | Fund	2
Foreign operations, number of countries | Country	7
European Joint Venture | Fund I
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Investment ownership percentage	32.10%
Number of hotels	3
European Joint Venture | Fund II
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Investment ownership percentage	33.40%
Number of hotels	7
Other Joint Venture
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of hotels	8
Number of joint ventures | JointVenture	6
HOST HOTELS & RESORTS, INC.
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of the common OP units	99.00%