v3.26.1

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2026	Apr. 29, 2026
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Securities Act File Number	814-00941
Entity Registrant Name	CĪON Investment Corporation
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	45-3058280
Entity Address, Address Line One	100 Park Avenue
Entity Address, Address Line Two	25th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10017
City Area Code	(212)
Local Phone Number	418-4700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		49,789,210
Central Index Key	0001534254
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	CION
Security Exchange Name	NYSE
2029 Notes
Document Information [Line Items]
Title of 12(b) Security	7.50% Notes due 2029
Trading Symbol	CICB
Security Exchange Name	NYSE
2031 Notes
Document Information [Line Items]
Title of 12(b) Security	7.50% Notes due 2031
Trading Symbol	CICC
Security Exchange Name	NYSE

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CION Investment Corp 10-Q