XML 13 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 001-36153  
Entity Registrant Name Criteo S.A.  
Entity Incorporation, State or Country Code I0  
Entity Address, Address Line One 32, rue Blanche  
Entity Address, City or Town Paris  
Entity Address, Country FR  
Entity Address, Postal Zip Code 75009  
Country Region 33  
City Area Code 40  
Local Phone Number 40 22 90  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   65,171,310
Entity Central Index Key 0001576427  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Amendment Flag false  
American Depositary Shares    
Document Information [Line Items]    
Title of 12(b) Security American Depositary Shares, each representing one Ordinary Share,nominal value €0.025 per share  
Trading Symbol CRTO  
Security Exchange Name NASDAQ  
Ordinary Shares    
Document Information [Line Items]    
Title of 12(b) Security ​Ordinary Shares, nominal value €0.025 per share​  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ