Equity of Host Inc. and Capital of Host L.P. - Additional Information (Detail) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 21, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 $ / shares shares	Oct. 29, 2015 USD ($)	Apr. 30, 2015 USD ($)	Dec. 31, 2013 shares
Stockholders Equity Note [Line Items]
Common stock, shares authorized		1,050,000,000	1,050,000,000
Common stock, par value | $ / shares		$ 0.01	$ 0.01
Common stock, shares outstanding		737,800,000	750,300,000
Dividend policy		The amount of any future dividends will be determined by Host Inc.’s Board of Directors.
Dividends taxable as ordinary income to stockholders		66.00%	80.00%
Dividends taxable as qualified income to stockholders		4.00%	8.00%
Dividends taxable as unrecaptured Section 1250 gain		6.00%	7.00%
Capital Gains Distribution Percentage		24.00%	5.00%
Dividend per share, declared | $ / shares		$ 0.85	$ 0.80	$ 0.75
Lower Limit
Stockholders Equity Note [Line Items]
Percentage of annual taxable income Host Inc is required to distribute		90.00%
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Common stock, shares authorized		1,050,000,000	1,050,000,000
Common stock, par value | $ / shares		$ 0.01	$ 0.01
Common stock, shares outstanding		737,800,000	750,300,000
Preferred stock, shares authorized		50,000,000
Preferred stock, no par value | $ / shares
Preferred stock, shares outstanding		0	0
Percentage of the common OP units		99.00%
Common stock repurchase, shares		13,800,000	38,300,000
Common stock repurchase, average price per share | $ / shares		$ 15.79	$ 17.64
Common stock repurchase, value | $		$ 218	$ 675
Debt converted into shares of Host Inc. common stock			32,000,000
HOST HOTELS & RESORTS, INC. | Maximum
Stockholders Equity Note [Line Items]
Common stock repurchase, authorized amount | $					$ 500	$ 500
HOST HOTELS & RESORTS, INC. | Subsequent Event
Stockholders Equity Note [Line Items]
Dividend declaration date	Feb. 21, 2017
Dividend per share, declared | $ / shares	$ 0.20
Dividend payable date	Apr. 17, 2017
Dividend record date	Mar. 31, 2017
HOST HOTELS & RESORTS, INC. | Subsequent Event | Maximum
Stockholders Equity Note [Line Items]
Common stock repurchase, authorized amount | $	$ 500
HOST HOTELS & RESORTS L.P.
Stockholders Equity Note [Line Items]
Percentage of the common OP Units		1.00%
Shares issuable upon conversion of one OP unit		1.021494	1.021494
Common OP units, outstanding		730,800,000	743,700,000
Exchangeable senior debentures, exchanged | $			$ 399
Debt converted into shares of Host Inc. common stock			32,000,000
HOST HOTELS & RESORTS L.P. | Limited Partner
Stockholders Equity Note [Line Items]
Common OP units, outstanding		722,200,000	734,500,000	739,900,000			738,900,000
Common stock repurchase, shares		13,500,000	37,500,000
Common stock repurchase, value | $		$ 218	$ 675