Equity Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stockholders Equity Note [Line Items]
Beginning Balance			$ 7,368
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 212	$ 155	310	$ 334
Net income attributable to non-controlling interests	1	2	6	5
Net income	3	2	4	5
Other comprehensive loss	3	$ 5	(34)	$ 12
Ending Balance	7,262		7,262
HOST HOTELS & RESORTS, INC.
Stockholders Equity Note [Line Items]
Beginning Balance			7,368
Net income			316
Issuance of common stock			12
Repurchase of common stock /OP units			(131)
Dividends declared on common stock			(301)
Distributions to non-controlling interests			(5)
Other changes in ownership			37
Other comprehensive loss			(34)
Ending Balance	7,262		7,262
HOST HOTELS & RESORTS, INC. | Parent
Stockholders Equity Note [Line Items]
Beginning Balance			7,336
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY			310
Issuance of common stock			12
Repurchase of common stock /OP units			(131)
Dividends declared on common stock			(301)
Other changes in ownership			38
Other comprehensive loss			(34)
Ending Balance	7,230		7,230
HOST HOTELS & RESORTS, INC. | Non-redeemable, non-controlling interest
Stockholders Equity Note [Line Items]
Beginning Balance			32
Net income attributable to non-controlling interests			6
Distributions to non-controlling interests			(5)
Other changes in ownership			(1)
Ending Balance	32		32
HOST HOTELS & RESORTS, INC. | Redeemable non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance			225
Net income			4
Distributions to non-controlling interests			(4)
Other changes in ownership			(39)
Ending Balance	$ 186		$ 186