Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017 USD ($) GroundLease
ASU 2016-02
Significant Accounting Policies [Line Items]
Number of ground leases | GroundLease	25
Percentage of operating lease payments	85.00%
ASU 2016-02 | Asset | Minimum
Significant Accounting Policies [Line Items]
Adjustment applied due to new accounting principle in period of adoption	$ 400,000,000
ASU 2016-02 | Asset | Maximum
Significant Accounting Policies [Line Items]
Adjustment applied due to new accounting principle in period of adoption	500,000,000
ASU 2016-02 | Liability | Minimum
Significant Accounting Policies [Line Items]
Adjustment applied due to new accounting principle in period of adoption	400,000,000
ASU 2016-02 | Liability | Maximum
Significant Accounting Policies [Line Items]
Adjustment applied due to new accounting principle in period of adoption	$ 500,000,000
HOST HOTELS & RESORTS, INC.
Significant Accounting Policies [Line Items]
Percentage of the common OP units	99.00%
HOST HOTELS & RESORTS, INC. | Sole General Partner | Variable Interest Entities
Significant Accounting Policies [Line Items]
Percentage of the common OP units	99.00%