Capital Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Limited Partners Capital Account [Line Items]
Beginning Balance			$ 7,368
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 85	$ 144	395	$ 478
Net income attributable to non-controlling interests	(1)	(1)	5	4
Net income	1	2	5	7
Other comprehensive loss	(35)	(35)	(69)	(23)
Ending Balance	6,988		6,988
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance			7,368
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	86	146	400	485
Net income			396
Issuance of common OP units			22
Repurchase of common stock /OP units			(352)
Distributions declared on common OP units			(449)
Distributions to non-controlling interests			(6)
Other changes in ownership			74
Other comprehensive loss	(35)	$ (35)	(69)	$ (23)
Ending Balance	6,988		6,988
HOST HOTELS & RESORTS L.P. | Parent
Limited Partners Capital Account [Line Items]
Beginning Balance			7,336
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY			395
Issuance of common OP units			22
Repurchase of common stock /OP units			(352)
Distributions declared on common OP units			(449)
Other changes in ownership			77
Other comprehensive loss			(69)
Ending Balance	6,960		6,960
HOST HOTELS & RESORTS L.P. | Non-controlling Interests
Limited Partners Capital Account [Line Items]
Beginning Balance			32
Net income attributable to non-controlling interests			5
Distributions to non-controlling interests			(6)
Other changes in ownership			(3)
Ending Balance	28		28
HOST HOTELS & RESORTS L.P. | Limited Partnership Interests Of Third Parties
Limited Partners Capital Account [Line Items]
Beginning Balance			225
Net income			4
Distributions declared on common OP units			(5)
Other changes in ownership			(77)
Ending Balance	$ 148		$ 148