Earnings Per Share - Schedule of Basic Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Net income attributable to shareholders of Criteo S.A.	$ 7,817	$ 37,928
Weighted average number of shares outstanding of Criteo S.A. (in shares)	50,352,465	53,979,157
Basic earnings per share (in USD per share)	$ 0.16	$ 0.70

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details