Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, shares in Millions		3 Months Ended	9 Months Ended
	Sep. 15, 2016 $ / shares	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2015 USD ($)	Dec. 31, 2015	Oct. 31, 2015 USD ($)
Stockholders Equity Note [Line Items]
Amounts reclassified from other comprehensive income (loss)		$ 7,000,000	$ (17,000,000)	$ 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			Sep. 15, 2016
Dividend per share, declared | $ / shares	$ 0.20
Dividend payable date			Oct. 17, 2016
Dividend record date			Sep. 30, 2016
Common stock repurchase, shares | shares		2.8	13.1
Common stock repurchase, average price per share | $ / shares		$ 16.04	$ 15.79
Common stock repurchase, value		$ 44,000,000	$ 206,000,000
Stock Repurchase Program capacity		$ 117,000,000	$ 117,000,000
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)		$ 7,000,000	$ (17,000,000)	$ 5,000,000
Common OP units, distribution paid | $ / shares			$ 0.2042988
Common stock repurchase, value			$ 206,000,000