v3.26.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2026
May 06, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Registrant Name CIRCLE INTERNET GROUP, INC.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-42671  
Entity Tax Identification Number 99-2840247  
Entity Address, Address Line One One World Trade Center  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10007  
City Area Code 332  
Local Phone Number 334-0660  
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol CRCL  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001876042  
Current Fiscal Year End Date --12-31  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   229,857,799
Class B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   18,718,231
Common Class C    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   0