Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail)		9 Months Ended
	Aug. 03, 2022 USD ($) $ / shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021
Stockholders Equity Note [Line Items]
Net proceeds		$ 1,000,000	$ 138,000,000
Units issued | shares		0
Stock issuance remaining capacity		$ 460,000,000
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		$ 0.12257928
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	$ 0.12
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Authorized Amount	$ 1,000,000,000	$ 1,000,000,000
HOST HOTELS & RESORTS, INC. | Minimum [Member]
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Authorized Amount	$ 371,000,000