Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 16, 2022 $ / shares	Mar. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021
Stockholders Equity Note [Line Items]
Units issued | shares		0
Stock issuance remaining capacity | $		$ 460
Host L.P.
Stockholders Equity Note [Line Items]
Percentage of the common OP units		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
Cash dividend | $ / shares		$ 0.03064482
HOST HOTELS & RESORTS L.P. | Line Of Credit [Member] | Maximum
Stockholders Equity Note [Line Items]
Leverage ratio as calculated under the credit facility		7.25
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Share repurchase program, shares repurchased | shares		0
Cash dividend | $ / shares	$ 0.03
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Authorized Amount | $		$ 371