| Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 270 | 414 | 364 | 419 | 488 | 516 | 348 | 336 | 291 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 397 | 484 | 474 | 482 | 474 | 582 | 709 | 776 | 801 |
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| Income taxes | 3 | 9 | 19 | 22 | 11 | 9 | 24 | 2 | 2 |
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| Other taxes | 53 | 58 | 53 | 61 | 70 | 73 | 78 | 109 | 54 |
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| Other current assets | 19 | 26 | 23 | 17 | 21 | 34 | 52 | 48 | 51 |
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| Restricted Cash, Current | - | - | - | - | - | - | 25 | 75 | 0 |
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| Marketable Securities, Current | - | - | - | - | - | 50 | 25 | 6 | 26 |
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| Total current assets | 743 | 992 | 934 | 1,000 | 1,065 | 1,264 | 1,261 | 1,353 | 1,224 |
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| Property and equipment, net | 109 | 162 | 184 | 194 | 190 | 140 | 131 | 126 | 107 |
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| Intangible assets, net | 103 | 96 | 112 | 87 | 80 | 83 | 176 | 181 | 158 |
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| Goodwill | 209 | 237 | 313 | 317 | 326 | 330 | 515 | 524 | 515 |
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| Operating Lease, Right-of-Use Asset | - | - | - | 142 | 114 | 120 | 102 | 112 | 99 |
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| Marketable Securities, Noncurrent | - | - | - | - | 42 | 5 | - | 17 | 16 |
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| Noncurrent financial assets | 17 | 20 | 20 | 22 | 18 | 6 | 6 | 5 | 4 |
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| Other noncurrent assets | - | - | - | - | - | - | 51 | 61 | 61 |
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| Deferred tax assets | 31 | 25 | 34 | 28 | 20 | 35 | 32 | 53 | 81 |
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| Total noncurrent assets | 469 | 540 | 663 | 790 | 789 | 719 | 1,088 | 1,079 | 1,042 |
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| Total assets | 1,211 | 1,531 | 1,597 | 1,790 | 1,853 | 1,984 | 2,349 | 2,432 | 2,266 |
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| Trade payables | 366 | 417 | 425 | 390 | 367 | 430 | 743 | 839 | 803 |
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| Contingencies - current portion | - | - | - | - | - | - | - | 1 | 2 |
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| Income taxes | 14 | 10 | 8 | 3 | 3 | 7 | 13 | 17 | 35 |
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| Financial Liabilities, Current | 8 | 1 | 1 | 4 | 3 | 1 | 0 | 3 | 3 |
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| Operating Lease, Liability, Current | - | - | - | 46 | 48 | 34 | 31 | 35 | 26 |
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| Other taxes | 45 | 59 | 56 | 50 | 58 | 60 | 58 | 67 | 19 |
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| Employee-related payables | 56 | 66 | 66 | 75 | 85 | 98 | 86 | 113 | 109 |
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| Other current liabilities | 30 | 66 | 47 | 36 | 33 | 40 | 83 | 105 | 50 |
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| Total current liabilities | 520 | 621 | 605 | 610 | 600 | 673 | 1,080 | 1,180 | 1,047 |
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| Deferred tax liabilities | 1 | 2 | 11 | 9 | 5 | 3 | 3 | 1 | 4 |
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| Retirement benefit obligation | 3 | 5 | 6 | 8 | 6 | 6 | 4 | 4 | 5 |
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| Financial Liabilities, Noncurrent | 78 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
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| Operating Lease, Liability, Noncurrent | - | - | - | 118 | 83 | 94 | 78 | 83 | 78 |
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| Contingencies - noncurrent portion | - | - | - | - | - | - | 34 | 33 | 32 |
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| Other noncurrent liabilities | - | 3 | 5 | 6 | 6 | 10 | 69 | 19 | 20 |
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| Total noncurrent liabilities | 82 | 13 | 24 | 142 | 100 | 113 | 188 | 140 | 139 |
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| Total liabilities | 601 | 634 | 629 | 752 | 701 | 785 | 1,268 | 1,321 | 1,185 |
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| Common Stock, Value, Issued | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
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| Treasury stock, 3,467,417 and 5,400,572 shares at cost as of December 31, 2024 and December 31, 2023, respectively. | - | - | 79 | 75 | 86 | 132 | 174 | 162 | 125 |
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| Additional paid-in capital | 488 | 591 | 663 | 668 | 693 | 731 | 734 | 769 | 710 |
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| Accumulated other comprehensive income (loss) | -89 | -12 | -31 | -40 | 16 | -40 | -92 | -85 | -109 |
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| Retained earnings | 198 | 300 | 388 | 452 | 491 | 602 | 578 | 555 | 572 |
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| Equity - attributable to shareholders of Criteo S.A. | 610 | 898 | 968 | 1,038 | 1,153 | 1,198 | 1,081 | 1,111 | 1,081 |
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| Noncontrolling interests | 10 | 16 | 24 | 31 | 36 | 35 | 33 | 32 | 32 |
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| Total equity | 610 | 898 | 968 | 1,038 | 1,153 | 1,198 | 1,081 | 1,111 | 1,081 |
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| Total equity and liabilities | 1,211 | 1,531 | 1,597 | 1,790 | 1,853 | 1,984 | 2,349 | 2,432 | 2,266 |
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