v3.26.1
Cover Page - shares
6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-36153  
Entity Registrant Name Criteo S.A.  
Entity Incorporation, State or Country Code N4  
Entity Address, Address Line One 5 Place de la Gare  
Entity Address, Postal Zip Code L-1616  
Entity Address, City or Town Luxembourg  
Entity Address, Country LU  
Country Region 352  
City Area Code 27  
Local Phone Number 866850  
Title of 12(b) Security Ordinary Shares, nominal value €0.025 per share  
Trading Symbol CRTO  
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   48,997,559
Entity Central Index Key 0001576427  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false