Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Entity Registrant Name	IKENA ONCOLOGY, INC.
Entity Central Index Key	0001835579
Entity Incorporation, State or Country Code	DE
Entity File Number	001-40287
Entity Tax Identification Number	81-1697316
Entity Address, Address Line One	645 Summer Street
Entity Address, Address Line Two	Suite 101
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02210
City Area Code	857
Local Phone Number	273-8343
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	IKNA
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		36,257,493