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Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail)
9 Months Ended
Sep. 18, 2017
$ / shares
Sep. 30, 2017
$ / shares
Dec. 31, 2016
HOST HOTELS & RESORTS, INC.      
Stockholders Equity Note [Line Items]      
Percentage of the common OP units   99.00%  
Dividend declaration date Sep. 18, 2017    
Dividend per share, declared $ 0.20    
Dividend paid date Oct. 16, 2017    
Dividend record date Sep. 29, 2017    
HOST HOTELS & RESORTS L.P.      
Stockholders Equity Note [Line Items]      
Shares issuable upon conversion of one common OP unit   1.021494 1.021494
Common OP units, distribution paid   $ 0.2042988