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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 6 Months Ended
Jul. 15, 2024
$ / shares
Jun. 13, 2024
$ / shares
Jun. 30, 2024
USD ($)
$ / shares
shares
Mar. 31, 2024
shares
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
shares
Stockholders Equity Note [Line Items]              
Shares repurchased (in shares) | shares     2,800,000 0      
Shares repurchased, average price (in dollars per share) | $ / shares     $ 17.81        
Amount available for repurchase | $     $ 742   $ 742    
Stock issuance remaining capacity | $     600   600    
Dividend declared (in dollars per share) | $ / shares   $ 0.20          
Repurchase of common stock | $     $ 50   $ 50 $ 50  
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 | $     $ 50   $ 50 $ 50  
HOST HOTELS & RESORTS L.P. | Redeemable Non Controlling Interests              
Stockholders Equity Note [Line Items]              
Common units outstanding | shares     9,400,000   9,400,000   9,500,000
HOST HOTELS & RESORTS L.P. | Subsequent Event              
Stockholders Equity Note [Line Items]              
Distribution per share (in dollars per share) | $ / shares $ 0.2042988