Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended		6 Months Ended
	Jun. 14, 2023 $ / shares	May 31, 2023 USD ($)	Jun. 30, 2023 USD ($) shares	Mar. 31, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022
Stockholders Equity Note [Line Items]
Repurchase of common stock, amount					$ 50
Units issued | shares					0.0
Stock issuance remaining capacity			$ 600		$ 600
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			1.021494		1.021494	1.021494
Repurchase of common stock, amount					$ 50
Cash dividend | $ / shares					$ 0.1532241
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Share repurchase program, shares repurchased | shares			0.0	3.2
Repurchase of common stock, amount				$ 50
Stock Repurchase Program, Authorized Amount			$ 923		$ 923
Shares repurchased, average price | $ / shares				$ 15.65
Cash dividend | $ / shares	$ 0.15
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Common stock issuable aggregate value		$ 600