Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Registrant Name	HOST HOTELS & RESORTS, INC.
Entity Central Index Key	0001070750
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	HST
Security Exchange Name	NASDAQ
Entity File Number	001-14625
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	53-0085950
Entity Address, Address Line One	4747 Bethesda Ave
Entity Address, Address Line Two	Suite 1300
Entity Address, City or Town	Bethesda
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20814
City Area Code	240
Local Phone Number	744-1000
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		706,086,096
HOST HOTELS & RESORTS L.P.
Document Information [Line Items]
Entity Registrant Name	HOST HOTELS & RESORTS, L.P.
Entity Central Index Key	0001061937
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	0-25087
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	52-2095412
Entity Address, Address Line One	4747 Bethesda Ave
Entity Address, Address Line Two	Suite 1300
Entity Address, City or Town	Bethesda
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20814
City Area Code	240
Local Phone Number	744-1000