| Cover | Apr. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 29, 2020 |
| Entity File Number | 000-30319 |
| Entity Registrant Name | INNOVIVA, INC. |
| Entity Central Index Key | 0001080014 |
| Entity Tax Identification Number | 94-3265960 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1350 Old Bayshore Highway |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Burlingame |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94010 |
| City Area Code | 650 |
| Local Phone Number | 238-9600 |
| 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 $0.01 per share |
| Trading Symbol | INVA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
