Capital Allocation between Controlling and Non-Controlling Interests (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Limited Partners Capital Account [Line Items]
Beginning Balance			$ 7,033
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 104	$ 107	472	$ 636
Other comprehensive income	20	(8)	26	28
Ending Balance	7,108		7,108
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance			7,033
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	106	108	478	644
Net income			472
Issuance of common stock for comprehensive stock plans			17
Distributions declared on common OP units			(443)
Distributions to non-controlling interests			(14)
Changes in ownership and other			17
Other comprehensive income	20	$ (8)	26	$ 28
Ending Balance	7,108		7,108
HOST HOTELS & RESORTS L.P. | Parent
Limited Partners Capital Account [Line Items]
Beginning Balance			6,994
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY			472
Issuance of common stock for comprehensive stock plans			17
Distributions declared on common OP units			(443)
Changes in ownership and other			14
Other comprehensive income			25
Ending Balance	7,079		7,079
HOST HOTELS & RESORTS L.P. | Non-controlling Interests
Limited Partners Capital Account [Line Items]
Beginning Balance			39
Distributions to non-controlling interests			(14)
Changes in ownership and other			3
Other comprehensive income			1
Ending Balance	29		29
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance			165
Net income			6
Distributions declared on common OP units			(5)
Changes in ownership and other			(9)
Ending Balance	$ 157		$ 157