Equity of Host Inc. and Capital of Host L.P. - Components of Capital (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	$ 239	$ 210	$ 507	$ 497
Net income	239	211	507	498
Other comprehensive income (loss)	(5)	3	(8)	5
Distributions to non-controlling interests		(1)	(1)	(1)
Repurchase of common OP units	(50)		(50)	(50)
Non-redeemable, non-controlling interests
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		1		1
Distributions to non-controlling interests		(1)	(1)	(1)
HOST HOTELS & RESORTS L.P.
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	6,740	6,863	6,637	6,715
Net income	242	213	514	504
Net income	239	211	507	498
Changes in ownership and other	29		21
Other comprehensive income (loss)	(5)	3	(8)	5
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	6	8	(6)	4
Distributions declared on common OP units	(142)	(107)	(283)	(194)
Distributions to non-controlling interests		(1)	(1)	(1)
Repurchase of common OP units	(50)		(50)	(50)
Ending Balance	6,817	6,977	6,817	6,977
HOST HOTELS & RESORTS L.P. | Non-redeemable, non-controlling interests
Increase (Decrease) in Partners' Capital [Roll Forward]
Changes in ownership and other	(1)		0
HOST HOTELS & RESORTS L.P. | Accumulated Other Comprehensive Loss
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	(73)	(73)	(70)	(75)
Other comprehensive income (loss)	(5)	3	(8)	5
Ending Balance	(78)	(70)	(78)	(70)
HOST HOTELS & RESORTS L.P. | Non-redeemable, non-controlling interests
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	4	5	4	5
Net income		1		1
Distributions to non-controlling interests		(1)	(1)	(1)
Ending Balance	3	5	3	5
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	200	167	189	164
Net income	3	3	7	7
Changes in ownership and other	(30)		(21)
Distributions declared on common OP units	(1)	(2)	(3)	(3)
Ending Balance	172	168	172	168
HOST HOTELS & RESORTS L.P. | General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	1	1	1	1
Ending Balance	1	1	1	1
HOST HOTELS & RESORTS L.P. | Limited Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	6,808	6,930	6,702	6,784
Net income	239	210	507	497
Changes in ownership and other	30		21
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	6	8	(6)	4
Distributions declared on common OP units	(142)	(107)	(283)	(194)
Repurchase of common OP units	(50)		(50)	(50)
Ending Balance	$ 6,891	$ 7,041	$ 6,891	$ 7,041