Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($) Entity	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant Accounting Policies [Line Items]
Draws on credit facility	$ 0	$ 0	$ 2,245,000,000
Repayment of credit facility	(683,000,000)	(800,000,000)	(762,000,000)
Total assets of VIE	12,269,000,000	12,352,000,000
Liabilities of VIE	5,390,000,000	5,780,000,000
Advances to and investments in affiliates	$ 132,000,000	42,000,000
Percentage of property revenue allocated for renewal and replacement capital expenditures	5.00%
Impairment charges		92,000,000	0
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated | Entity	2
Non-redeemable non-controlling interests-other consolidated partnerships	$ 5,000,000	5,000,000
Net income (loss) attributable to non-controlling interests	1,000,000	1,000,000	(1,000,000)
Net income (loss)	$ 9,000,000	(1,000,000)	(8,000,000)
Percentage greater than threshold of income tax examination minimum likelihood of tax benefits being realized upon settlement	50.00%
RSU Awards | Vesting over one-year Period
Significant Accounting Policies [Line Items]
Equity award vesting period	1 year
RSU Awards | Vesting over two-year Period
Significant Accounting Policies [Line Items]
Equity award vesting period	2 years
RSU Awards | Vesting over three-year Period
Significant Accounting Policies [Line Items]
Equity award vesting period	3 years
Property, Plant and Equipment, Other Types
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Variable Interest Entities Not Primary Beneficiary
Significant Accounting Policies [Line Items]
Advances to and investments in affiliates	$ 7,000,000
HOST HOTELS & RESORTS L.P.
Significant Accounting Policies [Line Items]
Draws on credit facility	0	0	2,245,000,000
Repayment of credit facility	(683,000,000)	(800,000,000)	$ (762,000,000)
Total assets of VIE	12,269,000,000	12,352,000,000
Liabilities of VIE	5,390,000,000	5,780,000,000
Advances to and investments in affiliates	$ 132,000,000	$ 42,000,000
OP units conversion basis		one OP unit may be exchanged for 1.021494 shares of Host Inc. common stock) valued at the market price of Host Inc.
Shares issuable upon conversion of one common OP unit	1.021494	1.021494	1.021494
Houston Airport Marriott at George Bush Intercontinental | Variable Interest Entities
Significant Accounting Policies [Line Items]
Total assets of VIE	$ 54,000,000
Liabilities of VIE	$ 27,000,000
Houston Airport Marriott at George Bush Intercontinental | General Partner
Significant Accounting Policies [Line Items]
General partner and limited partner interest	85.00%
Maximum
Significant Accounting Policies [Line Items]
Percentage of property revenue allocated for renewal and replacement capital expenditures	5.00%
Maximum | Variable Interest Entities Not Primary Beneficiary
Significant Accounting Policies [Line Items]
General partner and limited partner interest	19.00%
Minimum
Significant Accounting Policies [Line Items]
Percentage of property revenue allocated for renewal and replacement capital expenditures	4.00%
Minimum | Variable Interest Entities Not Primary Beneficiary
Significant Accounting Policies [Line Items]
General partner and limited partner interest	11.00%
Host L.P.
Significant Accounting Policies [Line Items]
Investment ownership percentage	99.00%	99.00%