Capital Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Limited Partners Capital Account [Line Items]
Beginning Balance			$ 7,002
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 209	$ 210	462	$ 368
Other comprehensive loss	(13)	1	(8)	6
Ending Balance	7,166		7,166
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance			7,002
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	211	212	467	372
Net income			462
Issuance of common stock for comprehensive stock plans, net			6
Distributions declared on common OP units			(296)
Distributions to non-controlling interests			(1)
Changes in ownership and other			(4)
Other comprehensive loss	(13)	$ 1	(8)	$ 6
Cumulative effect of accounting change	5		5
Ending Balance	7,166		7,166
HOST HOTELS & RESORTS L.P. | Parent
Limited Partners Capital Account [Line Items]
Beginning Balance			6,973
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY			462
Issuance of common stock for comprehensive stock plans, net			6
Distributions declared on common OP units			(296)
Changes in ownership and other			(4)
Other comprehensive loss			(8)
Cumulative effect of accounting change	5		5
Ending Balance	7,138		7,138
HOST HOTELS & RESORTS L.P. | Non-controlling Interests
Limited Partners Capital Account [Line Items]
Beginning Balance			29
Distributions to non-controlling interests			(1)
Ending Balance	28		28
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance			167
Net income			5
Distributions declared on common OP units			(3)
Changes in ownership and other			4
Ending Balance	$ 173		$ 173