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Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 19, 2025 $ / shares | May 31, 2023 USD ($) | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 $ / shares shares | Aug. 03, 2022 USD ($) | Dec. 31, 2021 shares
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  | 1,050,000,000 | 1,050,000,000 |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.01 | $ 0.01 |  |  |
Common stock, shares outstanding (in shares) |  |  | 699,100,000 | 703,600,000 |  |  |
Stock repurchase program, authorized amount available for repurchase | $ |  |  |  |  |  | $ 371 |
Share repurchase program, shares repurchased (in shares) |  |  | 6,300,000 | 11,400,000 |  |  |
Shares repurchased, average price (in dollars per share) | $ / shares |  |  | $ 16.99 | $ 15.93 |  |  |
Repurchase of common stock exclusive of commissions. | $ |  |  | $ 107 | $ 181 |  |  |
Stock issuance remaining capacity | $ |  |  | $ 600 |  |  |  |
Dividends taxable as ordinary |  |  | 100.00% | 91.80% |  |  |
Dividends taxable as unrecaptured Section 1250 gain |  |  |  | 8.20% |  |  |
Dividends taxable as ordinary income deduction section 199A |  |  | 20.00% | 20.00% |  |  |
Common stock dividends (in dollars per share) | $ / shares |  |  | $ 0.90 | $ 0.90 | $ 0.53 |  |
Subsequent Event |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock dividends (in dollars per share) | $ / shares | $ 0.20 |  |  |  |  |  |
Common Stock | Equity Distribution Program |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock issuances (in shares) |  |  | 0 | 0 |  |  |
Minimum |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Percentage of annual taxable income Host Inc is required to distribute |  |  | 90.00% |  |  |  |
Host L.P. |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Percentage of investment ownership |  |  | 99.00% |  |  |  |
HOST HOTELS & RESORTS, INC. |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 50,000,000 | 50,000,000 |  |  |
Preferred stock, no par value (in dollars per share) | $ / shares |  |  | $ 0 | $ 0 |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 0 | 0 |  |  |
Stock repurchase program, authorized amount available for repurchase | $ |  |  | $ 685 |  |  |  |
Common stock repurchase, authorized amount | $ |  |  |  |  |  | $ 1,000 |
HOST HOTELS & RESORTS, INC. | Maximum |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock issuable aggregate value | $ |  | $ 600 |  |  |  |  |
HOST HOTELS & RESORTS L.P. |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of OP units |  |  | 1.021494 | 1.021494 |  |  |
Common OP units outstanding (in units) |  |  | 693,600,000 | 698,300,000 |  |  |
Common OP units, outstanding (in units) |  |  | 684,400,000 | 688,800,000 | 698,400,000 |  | 699,000,000.0
Share repurchase program, shares repurchased (in shares) |  |  | 6,200,000 | 11,200,000 | 1,600,000 |  |
Common OP units, outstanding (in units) |  |  | 684,400,000 | 688,800,000 |  |  |

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