v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 13, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Registrant Name COLUMBUS CIRCLE CAPITAL CORP I  
Entity Central Index Key 0002056263  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Small Business true  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Entity File Number 001-42653  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 3 Columbus Circle  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
City Area Code (646)  
Local Phone Number 792-5600  
Entity Address, Postal Zip Code 10019  
Document Quarterly Report true  
Document Transition Report false  
Entity Tax Identification Number 99-3947168  
Entity Ex Transition Period false  
Entity Interactive Data Current Yes  
Entity Current Reporting Status No  
Entity Shell Company true  
Entity Address, Address Line Two 24th Floor  
Class A Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   25,705,000
Class B Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   8,333,333
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant    
Document Information [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant  
Trading Symbol CCCMU  
Security Exchange Name NASDAQ  
Class A ordinary shares, par value $0.0001 per share    
Document Information [Line Items]    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share  
Trading Symbol CCCM  
Security Exchange Name NASDAQ  
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share    
Document Information [Line Items]    
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Trading Symbol CCCMW  
Security Exchange Name NASDAQ