v3.25.4
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Examination [Line Items]      
Provision for income taxes related to Pillar Two $ 700 $ 3,000  
Valuation allowance 18,979 27,621 $ 29,794
Unrecognized tax benefits 29,979 18,017 16,787
Share-Based Payment Arrangement      
Income Tax Examination [Line Items]      
Unrecognized tax benefits 8,400    
UK | Her Majesty's Revenue and Customs (HMRC)      
Income Tax Examination [Line Items]      
Decrease of valuation allowance 9,700    
Net operating loss carryforwards, not subject to expiration 30,400    
US | Internal Revenue Service (IRS)      
Income Tax Examination [Line Items]      
Net operating loss carryforwards, subject to expiration 35,400    
US | State Administration of Taxation, China | Research tax credit carryforward      
Income Tax Examination [Line Items]      
Net operating loss carryforwards, not subject to expiration 5,900    
Criteo Corp.      
Income Tax Examination [Line Items]      
Valuation allowance 5,900 5,900 5,700
Criteo Do Brasil      
Income Tax Examination [Line Items]      
Valuation allowance 0 0 2,700
Criteo Ltd      
Income Tax Examination [Line Items]      
Valuation allowance 0 9,300 10,700
Criteo Singapore      
Income Tax Examination [Line Items]      
Valuation allowance 0 0 1,200
Criteo Australia Pty Ltd      
Income Tax Examination [Line Items]      
Valuation allowance 4,000 2,900 2,900
Criteo France      
Income Tax Examination [Line Items]      
Valuation allowance $ 9,000 $ 8,700 $ 5,000