Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, $ in Millions			6 Months Ended
	Aug. 03, 2022 USD ($) $ / shares	May 04, 2022 $ / shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Mar. 31, 2022	Dec. 31, 2021
Stockholders Equity Note [Line Items]
Net proceeds | $			$ 0	$ 138
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	1.021494
Cash dividend | $ / shares			$ 0.06128964
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		$ 0.06
HOST HOTELS & RESORTS, INC. | Subsequent Event
Stockholders Equity Note [Line Items]
Cash dividend | $ / shares	$ 0.12
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Authorized Amount | $	$ 1,000		$ 371