Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 22, 2019
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	000-30319
Entity Registrant Name	INNOVIVA, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3265960
Entity Address, Address Line One	1350 Old Bayshore Highway 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
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	INVA
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		101,279,069
Entity Central Index Key	0001080014
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false