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Organization - Additional Information (Detail)	Sep. 30, 2024
Host L.P.
Organization Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Percentage of the common OP units	99.00%

X

- Definition

Organization consolidation and presentation of financial statements disclosure.

+ References

No definition available.

+ Details

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Namespace Prefix:	hst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_OwnershipAxis=hst_HostLimitedPartnershipInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: