Equity of Host Inc. and Capital of Host L.P. - Components of Capital (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Limited Partners Capital Account [Line Items]
Net income	$ 268	$ 287
Net income loss	268	287
Repurchase of common OP units		(50)
Distributions to non-controlling interests	(1)	0
Changes in ownership and other	8
Other comprehensive income (loss)	(3)	2
Non-redeemable, non-controlling interests
Limited Partners Capital Account [Line Items]
Net income		0
Distributions to non-controlling interests	(1)
Changes in ownership and other	(1)
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance	6,637	6,715
Net income	272	291
Net income loss	268	287
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	(12)	(4)
Repurchase of common OP units		(50)
Distributions declared on common OP units	(141)	(87)
Distributions to non-controlling interests	(1)
Changes in ownership and other		(8)
Other comprehensive income (loss)	(3)	2
Ending Balance	6,740	6,863
HOST HOTELS & RESORTS L.P. | Non-redeemable, non-controlling interests
Limited Partners Capital Account [Line Items]
Changes in ownership and other	1
HOST HOTELS & RESORTS L.P. | General Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	1	1
Ending Balance	1	1
HOST HOTELS & RESORTS L.P. | Limited Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	6,702	6,784
Net income	268	287
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	(12)	(4)
Repurchase of common OP units		(50)
Distributions declared on common OP units	(141)	(87)
Changes in ownership and other		(9)
Ending Balance	6,808	6,930
HOST HOTELS & RESORTS L.P. | Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Beginning Balance	(70)	(75)
Other comprehensive income (loss)	(3)	2
Ending Balance	(73)	(73)
HOST HOTELS & RESORTS L.P. | Non-redeemable, non-controlling interests
Limited Partners Capital Account [Line Items]
Beginning Balance	4	5
Net income		0
Distributions to non-controlling interests	(1)
Ending Balance	4	5
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance	189	164
Net income	4	4
Distributions declared on common OP units	(2)	(1)
Changes in ownership and other		9
Ending Balance	$ 200	$ 167