Equity of Host Inc. and Capital of Host L.P. - Components of Capital (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Limited Partners Capital Account [Line Items]
Net income loss	$ 287	$ 116
Dividends declared on common stock	(87)	(22)
Repurchase of common OP units	(50)
Other comprehensive income/(loss)	2	7
Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Other comprehensive income/(loss)	2	7
Non-controlling Interests
Limited Partners Capital Account [Line Items]
Net income loss		1
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance	6,715	6,446
Net income loss	291	117
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	(4)	(9)
Repurchase of common OP units	(50)
Distributions declared on common OP units	(87)	(22)
Changes in ownership and other		(14)
Other comprehensive income/(loss)	2	7
Ending Balance	6,863	6,525
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	6,784	6,516
Net income loss	287	116
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	(4)	(9)
Repurchase of common OP units	(50)
Distributions declared on common OP units	(87)	(22)
Changes in ownership and other		(13)
Ending Balance	6,930	6,588
HOST HOTELS & RESORTS L.P. | Total Capital
Limited Partners Capital Account [Line Items]
Net income loss	287	117
HOST HOTELS & RESORTS L.P. | Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Beginning Balance	(75)	(76)
Other comprehensive income/(loss)	2	7
Ending Balance	(73)	(69)
HOST HOTELS & RESORTS L.P. | Non-controlling Interests
Limited Partners Capital Account [Line Items]
Beginning Balance	5	5
Net income loss		1
Changes in ownership and other		(1)
Ending Balance	5	5
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance	164	126
Net income loss	4	1
Distributions declared on common OP units	(1)
Common OP unit issuances		56
Changes in ownership and other		20
Ending Balance	$ 167	$ 203