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Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Oct. 15, 2024
$ / shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
Dec. 31, 2023
Stockholders Equity Note [Line Items]            
Shares repurchased (in shares) | shares   3,500,000   6,300,000    
Shares repurchased, average price (in dollars per share) | $ / shares   $ 16.33   $ 16.99    
Repurchase of common stock | $   $ 57 $ 100 $ 107 $ 150  
Amount available for repurchase | $   685   685    
Stock issuance remaining capacity | $   $ 600   $ 600    
Dividend declared (in dollars per share) | $ / shares   $ 0.20        
Subsequent Event            
Stockholders Equity Note [Line Items]            
Dividend paid in cash (in dollars per share) | $ / shares $ 0.20          
Common Stock | Equity Distribution Program            
Stockholders Equity Note [Line Items]            
Shares issued (in shares) | shares       0    
Host L.P.            
Stockholders Equity Note [Line Items]            
Percentage of the common OP units   99.00%   99.00%    
HOST HOTELS & RESORTS L.P.            
Stockholders Equity Note [Line Items]            
Shares issuable upon conversion of one common OP unit (in shares)   1.021494   1.021494   1.021494
Repurchase of common stock | $   $ 57 $ 100 $ 107 $ 150  
HOST HOTELS & RESORTS L.P. | Subsequent Event            
Stockholders Equity Note [Line Items]            
Distribution per share (in dollars per share) | $ / shares $ 0.2042988