Organization - Additional Information (Detail) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
	Apr. 30, 2021 Hotel	Apr. 30, 2020 Hotel	Mar. 31, 2021 Hotel	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Draws on credit facility | $				$ 1,500
Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of additional hotel reopening | Hotel	1
COVID - 19 [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of hotels suspends operations | Hotel		35	4
Revolving Credit Facility | COVID - 19 [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Draws on credit facility | $					$ 1,500
Host L.P.
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of the common OP units			99.00%