Equity of Host Inc. and Capital of Host L.P. - Components of Equity (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Stockholders Equity Note [Line Items]
Beginning Balance	$ 6,637	$ 6,715
Net income	268	287
Net income loss	268	287
Issuance of common stock for comprehensive stock plans, net	(12)	(4)
Repurchase of common stock		(50)
Dividends declared on common stock	(141)	(87)
Distributions to non-controlling interests	(1)	0
Changes in ownership and other	(8)
Other comprehensive income (loss)	(3)	2
Ending Balance	6,740	6,863
Common Stock
Stockholders Equity Note [Line Items]
Beginning Balance	7	7
Ending Balance	7	7
Additional Paid-in Capital
Stockholders Equity Note [Line Items]
Beginning Balance	7,535	7,717
Issuance of common stock for comprehensive stock plans, net	(12)	(4)
Repurchase of common stock		(50)
Changes in ownership and other	(9)
Ending Balance	7,514	7,663
Accumulated Other Comprehensive Income (Loss)
Stockholders Equity Note [Line Items]
Beginning Balance	(70)	(75)
Other comprehensive income (loss)	(3)	2
Ending Balance	(73)	(73)
Retained Earnings / (Deficit)
Stockholders Equity Note [Line Items]
Beginning Balance	(839)	(939)
Dividends declared on common stock	(141)	(87)
Ending Balance	(712)	(739)
Non-redeemable, non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance	4	5
Net income		0
Distributions to non-controlling interests	(1)
Changes in ownership and other	1
Ending Balance	4	5
Redeemable, non-controlling interests
Stockholders Equity Note [Line Items]
Beginning Balance	189	164
Net income	4	4
Distributions to non-controlling interests	(2)	(1)
Changes in ownership and other	9
Ending Balance	$ 200	$ 167