XML 16 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Cover page - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2019
Entity Information [Line Items]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 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, Postal Zip Code 75009    
Entity Address, City or Town Paris    
Entity Address, Country FR    
Country Region 33    
City Area Code 40    
Local Phone Number 40 22 90    
Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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 Public Float     $ 1,100,000,000
Entity Common Stock, Shares Outstanding (in shares)   61,920,758  
Documents Incorporated by Reference
None.
    
Entity Central Index Key 0001576427    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag true    
Share capital      
Entity 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    
American Depositary Shares      
Entity 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