Components of Capital (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Limited Partners Capital Account [Line Items]
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	$ 286		$ 209		$ 472	$ 462
Other comprehensive income/(loss)	3		(13)		3	(8)
Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Other comprehensive income/(loss)	3		(13)	$ 5
Non-redeemable, non-controlling interests
Limited Partners Capital Account [Line Items]
Net income attributable to non-controlling interests	1	$ 1
Distributions to non-controlling interests		(67)	(1)
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance		7,566			7,566
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	289		211		477	467
Other comprehensive income/(loss)	3		(13)		3	(8)
Ending Balance	7,474				7,474
HOST HOTELS & RESORTS L.P. | General Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	1	1	1	1	1	1
Ending Balance	1	1	1	1	1	1
HOST HOTELS & RESORTS L.P. | Limited Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	7,571	7,552	7,153	7,032	7,552	7,032
NET INCOME ATTRIBUTABLE TO REPORTING ENTITY	286	186	209	253
Issuance of common stock for comprehensive stock plans, net	4	(2)	7	(1)
Repurchase of common OP units	(200)
Distributions declared on common OP units	(145)	(149)	(148)	(148)
Changes in ownership and other	6	(16)	(16)	13
Cumulative effect of accounting change				4
Ending Balance	7,522	7,571	7,205	7,153	7,522	7,205
HOST HOTELS & RESORTS L.P. | Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Beginning Balance	(59)	(59)	(55)	(60)	(59)	(60)
Other comprehensive income/(loss)	3		(13)	5
Ending Balance	(56)	(59)	(68)	(55)	(56)	(68)
HOST HOTELS & RESORTS L.P. | Non-redeemable, non-controlling interests
Limited Partners Capital Account [Line Items]
Beginning Balance	7	72	29	29	72	29
Net income attributable to non-controlling interests	1	1
Distributions to non-controlling interests		(67)	(1)
Changes in ownership and other	(1)	1
Ending Balance	7	7	28	29	7	28
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance	147	128	156	167	128	167
Net income	3	2	2	3
Distributions declared on common OP units		(2)	(1)	(2)
Distributions to non-controlling interests	(1)
Changes in ownership and other	(8)	19	16	(12)
Ending Balance	$ 141	$ 147	$ 173	$ 156	$ 141	$ 173