Equity Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stockholders Equity Note [Line Items]
Beginning Balance			$ 7,104
NET INCOME (LOSS) ATTRIBUTABLE TO REPORTING ENTITY	$ 347	$ 212	529	$ 310
Net income (loss) attributable to non-controlling interests	(1)	(1)	(1)	(1)
Net income (loss)	5	3	7	4
Other comprehensive income	23	$ 3	36	$ (34)
Ending Balance	7,214		7,214
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Beginning Balance			7,104
Net income (loss)			528
Issuance of common stock			6
Repurchase of common stock /OP units	(81)		(162)
Dividends declared on common stock			(297)
Other changes in ownership			(1)
Other comprehensive income			36
Ending Balance	7,214		7,214
HOST HOTELS & RESORTS, INC. | Parent
Stockholders Equity Note [Line Items]
Beginning Balance			7,064
NET INCOME (LOSS) ATTRIBUTABLE TO REPORTING ENTITY			529
Issuance of common stock			6
Repurchase of common stock /OP units			(162)
Dividends declared on common stock			(297)
Other changes in ownership			(1)
Other comprehensive income			36
Ending Balance	7,175		7,175
HOST HOTELS & RESORTS, INC. | Non-redeemable, non-controlling interest
Stockholders Equity Note [Line Items]
Beginning Balance			40
Net income (loss) attributable to non-controlling interests			(1)
Ending Balance	39		39
HOST HOTELS & RESORTS, INC. | Redeemable non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance			143
Net income (loss)			7
Distributions to non-controlling interests			(4)
Other changes in ownership			1
Ending Balance	$ 147		$ 147