Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, shares in Millions		3 Months Ended	6 Months Ended
	Jun. 15, 2016 $ / shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2015 USD ($)	Dec. 31, 2015	Oct. 31, 2015 USD ($)
Stockholders Equity Note [Line Items]
Amounts reclassified from other comprehensive income (loss)		$ (20,000,000)	$ (24,000,000)	$ 5,000,000
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Percentage of the common OP units		99.00%	99.00%
Dividend declaration date			Jun. 15, 2016
Dividend per share, declared | $ / shares	$ 0.20
Dividend payable date			Jul. 15, 2016
Dividend record date			Jun. 30, 2016
Common stock repurchase, shares | shares		5.2	10.3
Common stock repurchase, average price per share | $ / shares		$ 15.39	$ 15.73
Common stock repurchase, value		$ 81,000,000	$ 162,000,000
Stock Repurchase Program capacity		$ 162,000,000	$ 162,000,000
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Common stock repurchase, authorized amount						$ 500,000,000
HOST HOTELS & RESORTS L.P.
Stockholders Equity Note [Line Items]
Shares issuable upon conversion of one OP unit		1.021494	1.021494		1.021494
Amounts reclassified from other comprehensive income (loss)		$ (20,000,000)	$ (24,000,000)	$ 5,000,000
Common OP units, distribution paid | $ / shares			$ 0.2042988
Common stock repurchase, value			$ 162,000,000