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Document and Entity Information
Jul. 06, 2020
Apr. 29, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Jul. 06, 2020  
Entity Registrant Name CRITEO S.A.  
Entity Incorporation, State or Country Code I0  
Entity File Number 001-36153  
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 14  
Local Phone Number 040 2290  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Entity Central Index Key 0001576427  
Amendment Flag false