Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, $ in Millions			12 Months Ended
	Feb. 15, 2023 $ / shares	May 06, 2021 USD ($)	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares	Aug. 03, 2022 USD ($)
Stockholders Equity Note [Line Items]
Common stock, shares authorized			1,050,000,000	1,050,000,000
Common stock, par value | $ / shares			$ 0.01	$ 0.01
Common stock, shares outstanding			713,400,000	714,100,000
Dividend policy			The amount of any future dividends will be determined by Host Inc.’s Board of Directors.
Issuance of common stock | $			$ 1	$ 138	$ 0
Common OP unit issuances (units)			0
Stock issuance remaining capacity | $			$ 460
Dividends taxable as ordinary			78.10%
Dividends taxable as unrecaptured Section 1250 gain			21.90%
Dividends taxable as ordinary income deduction section 199A			20.00%
Cash dividend | $ / shares			$ 0.53	$ 0	$ 0.20
Subsequent Event
Stockholders Equity Note [Line Items]
Cash dividend | $ / shares	$ 0.12
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]
Investment ownership percentage			99.00%	99.00%
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Common stock, shares authorized			1,050,000,000	1,050,000,000
Common stock, par value | $ / shares			$ 0.01	$ 0.01
Common stock, shares outstanding			713,400,000	714,100,000
Preferred stock, shares authorized			50,000,000	50,000,000
Preferred stock, no par value | $ / shares			$ 0	$ 0
Preferred stock, shares outstanding			0	0
Common OP units, outstanding			698,400,000	699,000,000.0
Common stock repurchase, authorized amount | $						$ 1,000
Stock repurchase program, Authorized amount available for repurchase | $			$ 973
Shares repurchased, average price | $ / shares			$ 15.93
Share repurchase program, shares repurchased			1,700,000	0
Repurchase of common stock, amount | $			$ 27
Common stock issuances (shares)				7,800,000
Shares Issued Price Per Share | $ / shares				$ 17.99
Issuance of common stock | $				$ 138
HOST HOTELS & RESORTS, INC. | Minimum
Stockholders Equity Note [Line Items]
Stock repurchase program, Authorized amount available for repurchase | $						$ 371
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 one common OP unit			1.021494	1.021494	1.021494
Common OP units, outstanding			708,400,000	706,100,000
Common OP unit issuances (units)				7,600,000