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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 |  |  |  |  |

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