| Document and Entity Information | Oct. 05, 2020 |
| Document And Entity Information [Line Items] | |
| Current Fiscal Year End Date | --12-31 |
| Amendment Flag | false |
| Entity Central Index Key | 0001435049 |
| Document Type | 8-K |
| Document Period End Date | Oct. 5, 2020 |
| Entity Registrant Name | ADURO BIOTECH, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35890 |
| Entity Tax Identification Number | 94-3348934 |
| Entity Address, Address Line One | 1600 Fairview Avenue East |
| Entity Address, City or Town | Seattle |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 98102 |
| City Area Code | 206 |
| Local Phone Number | 485-7051 |
| Entity Information, Former Legal or Registered Name | Aduro Biotech, Inc. |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | KDNY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Former Address [Member] | |
| Document And Entity Information [Line Items] | |
| Entity Address, Address Line One | 750 Heinz Avenue |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Berkeley |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94710 |
