| Cover Page | Feb. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 18, 2021 |
| Entity Registrant Name | HOST HOTELS & RESORTS, INC. |
| Entity Central Index Key | 0001070750 |
| Entity Emerging Growth Company | false |
| 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 Avenue |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $.01 par value |
| Trading Symbol | HST |
| Security Exchange Name | NASDAQ |
