| Document and Entity Information | Jul. 29, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | FATE THERAPEUTICS INC |
| Amendment Flag | false |
| Entity Central Index Key | 0001434316 |
| Document Type | 8-K |
| Document Period End Date | Jul. 29, 2024 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-36076 |
| Entity Tax Identification Number | 65-1311552 |
| Entity Address, Address Line One | 12278 Scripps Summit Dr. |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92131 |
| City Area Code | (858) |
| Local Phone Number | 875-1800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value per share |
| Trading Symbol | FATE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
