XML 46 R31.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
3 Months Ended
Mar. 31, 2018
USD ($)
GroundLease
Jan. 01, 2018
USD ($)
Atlanta Marriott Marquis    
Significant Accounting Policies [Line Items]    
Environmental liabilities $ 400,000  
Maximum | Atlanta Marriott Marquis    
Significant Accounting Policies [Line Items]    
Environmental liabilities $ 5,000,000  
ASU 2016-02    
Significant Accounting Policies [Line Items]    
Number of ground leases | GroundLease 26  
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  
ASU No. 2014-09    
Significant Accounting Policies [Line Items]    
Adoption of revenue recognition, description We adopted these standards on January 1, 2018, using a modified retrospective approach with a cumulative effect recognized in our equity balance on the date of adoption and no restatements of prior period amounts. When applying the new standard for the cumulative effect, we elected to apply the new standard only to contracts that were not considered completed as of the date of adoption.  
Decrease in total liabilities   $ 4,500,000
Increase in total equity   $ 4,500,000
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%