$CRTO
Criteo S.A. Stock $crto

$crto Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000157642721000008 Filed on February 26, 2021

Income Statement

Concept	2019 Q4	2019	2018 Q4
Revenue	$652.6M	$2.262B	$670.1M
YoY Change	-2.6%	-1.69%	-0.58%
Cost Of Revenue	$417.7M	$1.432B	$437.0M
YoY Change	-4.42%	-2.29%	1.92%
Gross Profit	$234.9M	$829.0M	$233.1M
YoY Change	0.8%	-0.62%	-4.95%
Gross Profit Margin	36.0%	36.66%	34.78%
Selling, General & Admin	$114.1M	$515.2M	$118.5M
YoY Change	-3.65%	1.45%	-0.78%
% of Gross Profit	48.59%	62.15%	50.83%
Research & Development	$33.45M	$172.6M	$40.99M
YoY Change	-18.4%	-3.72%	-1.23%
% of Gross Profit	14.24%	20.82%	17.59%
Depreciation & Amortization	$39.73M	$56.60M	$32.83M
YoY Change	21.03%	-27.61%	4.87%
% of Gross Profit	16.91%	6.83%	14.08%
Operating Expenses	$165.4M	$687.8M	$169.7M
YoY Change	-2.51%	0.1%	-0.09%
Operating Profit	$69.54M	$141.2M	$63.40M
YoY Change	9.68%	-4.01%	-15.91%
Interest Expense	-$1.493M	$2.383M	-$1.723M
YoY Change	-13.35%	13.1%	-21.68%
% of Operating Profit	-2.15%	1.69%	-2.72%
Other Income/Expense, Net	-$28.00K	-$5.749M	-$23.00K
YoY Change	21.74%	13.08%
Pretax Income	$57.36M	$135.5M	$60.43M
YoY Change	-5.09%	-4.62%	-11.52%
Income Tax	$15.88M	$39.50M	$18.30M
% Of Pretax Income	27.69%	29.16%	30.28%
Net Earnings	$42.02M	$90.75M	$37.97M
YoY Change	10.69%	2.37%	-28.37%
Net Earnings / Revenue	6.44%	4.01%	5.67%
Basic Earnings Per Share		$1.41
Diluted Earnings Per Share	$650.1K	$1.38	$566.2K
COMMON SHARES
Basic Shares Outstanding	64.08M shares	64.31M shares	67.36M shares
Diluted Shares Outstanding		65.60M shares

Balance Sheet

Concept	2019 Q4	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$418.8M	$418.8M	$364.4M
YoY Change	14.91%	14.93%	-12.0%
Cash & Equivalents	$418.8M		$364.4M
Short-Term Investments	$189.1M	$189.1M	$125.4M
Other Short-Term Assets	$17.23M	$13.00M	$22.82M
YoY Change	-24.5%	-28.18%	-13.34%
Inventory
Prepaid Expenses	$7.891M		$12.30M
Receivables	$481.7M	$481.7M	$473.9M
Other Receivables	$86.97M	$87.00M	$77.47M
Total Short-Term Assets	$1.000B	$1.001B	$933.9M
YoY Change	7.13%	7.13%	-5.84%
LONG-TERM ASSETS
Property, Plant & Equipment	$194.2M	$336.2M	$184.0M
YoY Change	5.51%	82.72%	13.77%
Goodwill	$317.1M		$312.9M
YoY Change	1.35%		32.11%
Intangibles	$86.89M		$112.0M
YoY Change	-22.45%		16.43%
Long-Term Investments	$21.75M	$21.70M	$20.46M
YoY Change	6.29%	5.85%	4.92%
Other Assets	$27.99M	$28.00M	$33.89M
YoY Change	-17.43%	-17.4%	34.5%
Total Long-Term Assets	$789.9M	$789.9M	$663.3M
YoY Change	19.09%	19.1%	22.94%
TOTAL ASSETS
Total Short-Term Assets	$1.000B	$1.001B	$933.9M
Total Long-Term Assets	$789.9M	$789.9M	$663.3M
Total Assets	$1.790B	$1.790B	$1.597B
YoY Change	12.1%	12.1%	4.3%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$394.7M	$394.7M	$446.8M
YoY Change	-11.67%	-11.66%	-0.22%
Accrued Expenses	$120.6M	$120.6M	$65.88M
YoY Change	83.12%	83.0%	-0.49%
Deferred Revenue	$227.0K		$623.0K
YoY Change	-63.56%		-11.76%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$3.636M	$3.600M	$1.018M
YoY Change	257.17%	260.0%	3.67%
Total Short-Term Liabilities	$610.3M	$610.3M	$605.3M
YoY Change	0.83%	0.83%	-2.52%
LONG-TERM LIABILITIES
Long-Term Debt	$769.0K	$800.0K	$2.490M
YoY Change	-69.12%	-68.0%	38.49%
Other Long-Term Liabilities	$5.543M	$132.0M	$5.103M
YoY Change	8.62%	1145.28%	82.71%
Total Long-Term Liabilities	$142.1M	$132.8M	$23.90M
YoY Change	494.38%	913.74%	89.73%
TOTAL LIABILITIES
Total Short-Term Liabilities	$610.3M	$610.3M	$605.3M
Total Long-Term Liabilities	$142.1M	$132.8M	$23.90M
Total Liabilities	$752.4M	$783.1M	$629.2M
YoY Change	19.57%	19.83%	-0.69%
SHAREHOLDERS EQUITY
Retained Earnings	$451.7M		$387.9M
YoY Change	16.46%		29.2%
Common Stock	$670.5M		$665.5M
YoY Change	0.76%		12.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$74.90M		$79.16M
YoY Change	-5.38%
Treasury Stock Shares	3.900M shares		3.500M shares
Shareholders Equity	$1.007B	$1.007B	$943.7M
YoY Change
Total Liabilities & Shareholders Equity	$1.790B	$1.790B	$1.597B
YoY Change	12.1%	12.1%	4.3%

Cashflow Statement

Concept	2019 Q4	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$42.02M	$90.75M	$37.97M
YoY Change	10.69%	2.37%	-28.37%
Depreciation, Depletion And Amortization	$39.73M	$56.60M	$32.83M
YoY Change	21.03%	-27.61%	4.87%
Cash From Operating Activities	$59.36M	$222.8M	$85.63M
YoY Change	-30.68%	-14.53%	8.39%
INVESTING ACTIVITIES
Capital Expenditures	-$17.52M	-$97.90M	-$38.58M
YoY Change	-54.59%	-21.99%	-19.46%
Acquisitions
YoY Change
Other Investing Activities	-$17.00K	-$5.900M	-$59.14M
YoY Change	-99.97%	-64.91%	-362.84%
Cash From Investing Activities	-$17.54M	-$103.9M	-$97.72M
YoY Change	-82.05%	-54.18%	283.2%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$56.90M
YoY Change		-27.54%
Debt Paid & Issued, Net		$1.022M
YoY Change		6.02%
Cash From Financing Activities	-40.47M	-$59.11M	-79.38M
YoY Change	-49.01%	-5.69%	-1468.55%
NET CHANGE
Cash From Operating Activities	59.36M	$222.8M	85.63M
Cash From Investing Activities	-17.54M	-$103.9M	-97.72M
Cash From Financing Activities	-40.47M	-$59.11M	-79.38M
Net Change In Cash	1.349M	$54.34M	-91.47M
YoY Change	-101.47%	-209.36%	-254.24%
FREE CASH FLOW
Cash From Operating Activities	$59.36M	$222.8M	$85.63M
Capital Expenditures	-$17.52M	-$97.90M	-$38.58M
Free Cash Flow	$76.88M	$320.7M	$124.2M
YoY Change	-38.1%	-16.96%	-2.12%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001576427
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-36153
CY2020	dei	Entity Registrant Name EntityRegistrantName	Criteo S.A.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	I0
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	32 Rue Blanche
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	75009
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Paris
CY2020	dei	Entity Address Country EntityAddressCountry	FR
CY2020	dei	Country Region CountryRegion	33
CY2020	dei	City Area Code CityAreaCode	40
CY2020	dei	Local Phone Number LocalPhoneNumber	40 22 90
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	754000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	60761359	shares
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	488011000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	418763000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	39900000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16100000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	474055000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	481732000	USD
CY2020Q4	crto	Prepaid Income Taxes PrepaidIncomeTaxes	11092000	USD
CY2019Q4	crto	Prepaid Income Taxes PrepaidIncomeTaxes	21817000	USD
CY2020Q4	crto	Prepaid Other Taxesand Other Taxes Receivable PrepaidOtherTaxesandOtherTaxesReceivable	69987000	USD
CY2019Q4	crto	Prepaid Other Taxesand Other Taxes Receivable PrepaidOtherTaxesandOtherTaxesReceivable	60924000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	21405000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	17225000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1064550000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	1000461000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	189505000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	194161000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	79744000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	86886000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	325805000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	317100000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	114012000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	142044000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	41809000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	0	USD
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CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	19876000	USD
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CY2020Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	788860000	USD
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CY2020Q4	us-gaap	Assets Assets	1853410000	USD
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CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	367025000	USD
CY2019Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	390277000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2250000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	6385000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2626000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	3422000	USD
CY2020Q4	crto	Financial Liabilities Current FinancialLiabilitiesCurrent	2889000	USD
CY2019Q4	crto	Financial Liabilities Current FinancialLiabilitiesCurrent	3636000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	48388000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	45853000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	58491000	USD
CY2019Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	50099000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	85272000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	74781000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	33390000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	35886000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	600331000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	610339000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	5297000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	9272000	USD
CY2020Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	6167000	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	8485000	USD
CY2020Q4	crto	Financial Liabilities Noncurrent FinancialLiabilitiesNoncurrent	386000	USD
CY2019Q4	crto	Financial Liabilities Noncurrent FinancialLiabilitiesNoncurrent	769000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	83007000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	117988000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5535000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5543000	USD
CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	100392000	USD
CY2019Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	142057000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2072617000	USD
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CY2019Q4	us-gaap	Liabilities Liabilities	752396000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.025
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.025
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	66272106	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	66272106	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	66272106	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	66197181	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	66197181	shares
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CY2020Q4	us-gaap	Common Stock Value CommonStockValue	2161000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	2158000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5632536	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3903673	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	85570000	USD
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CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	693164000	USD
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CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	491359000	USD
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CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1117142000	USD
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CY2020Q4	us-gaap	Minority Interest MinorityInterest	35545000	USD
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CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1853410000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1790384000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2261516000	USD
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CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1247571000	USD
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CY2020	us-gaap	Gross Profit GrossProfit	688018000	USD
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CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	132513000	USD
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CY2019	us-gaap	Operating Expenses OperatingExpenses	687822000	USD
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CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	108825000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	141214000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	147107000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1939000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5749000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5084000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	106886000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	135465000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	142023000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39496000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46144000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	74689000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	95969000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	95879000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	71679000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	90745000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	88644000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3010000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5224000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	7235000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.18
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.41
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
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CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60876480	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64305965	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	66456890	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61818593	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65598588	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	67662904	shares
CY2020	us-gaap	Profit Loss ProfitLoss	74689000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	95969000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	95879000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	53213000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-8070000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18781000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	53213000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-8070000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-18781000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4692000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1211000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-916000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-5214000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	1373000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-1235000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-522000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	162000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-319000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	132594000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	86688000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	78014000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	130821000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	86353000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	77594000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1773000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	335000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	420000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	897698000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	95879000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-17865000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2955000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	79159000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	65118000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	-3265000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	967891000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	95969000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-9282000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1831000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	58883000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	39613000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	-849000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1037988000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	74689000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	57906000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1936000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	43587000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	27101000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	3346000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1152687000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	74689000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	95969000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	95879000	USD
CY2020	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	154629000	USD
CY2019	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	126281000	USD
CY2018	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	154436000	USD
CY2020	crto	Depreciation Depletionand Amortizationand Provisionsfor Various DepreciationDepletionandAmortizationandProvisionsforVarious	106591000	USD
CY2019	crto	Depreciation Depletionand Amortizationand Provisionsfor Various DepreciationDepletionandAmortizationandProvisionsforVarious	97110000	USD
CY2018	crto	Depreciation Depletionand Amortizationand Provisionsfor Various DepreciationDepletionandAmortizationandProvisionsforVarious	111825000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	28770000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	40999000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	66600000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-2714000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3720000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15418000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-8157000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	10867000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-28015000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-12744000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1967000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-769000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	3088000	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	43962000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-582000	USD
CY2018	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-10411000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3957000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-876000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1358000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-33314000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-14145000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	9047000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	7188000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-7631000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-3974000	USD
CY2020	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	6261000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	11390000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-3968000	USD
CY2020	crto	Increase Decrease In Operating Lease Liabilities Assets IncreaseDecreaseInOperatingLeaseLiabilitiesAssets	-5764000	USD
CY2019	crto	Increase Decrease In Operating Lease Liabilities Assets IncreaseDecreaseInOperatingLeaseLiabilitiesAssets	-5170000	USD
CY2018	crto	Increase Decrease In Operating Lease Liabilities Assets IncreaseDecreaseInOperatingLeaseLiabilitiesAssets	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	185356000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	222832000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	260726000	USD
CY2020	crto	Payments To Acquire Intangible Assets Property Plant And Equipment PaymentsToAcquireIntangibleAssetsPropertyPlantAndEquipment	67287000	USD
CY2019	crto	Payments To Acquire Intangible Assets Property Plant And Equipment PaymentsToAcquireIntangibleAssetsPropertyPlantAndEquipment	82716000	USD
CY2018	crto	Payments To Acquire Intangible Assets Property Plant And Equipment PaymentsToAcquireIntangibleAssetsPropertyPlantAndEquipment	116984000	USD
CY2020	crto	Increase Decreasein Accounts Payable Relatedto Intangible Assets Property Plantand Equipment IncreaseDecreaseinAccountsPayableRelatedtoIntangibleAssetsPropertyPlantandEquipment	1818000	USD
CY2019	crto	Increase Decreasein Accounts Payable Relatedto Intangible Assets Property Plantand Equipment IncreaseDecreaseinAccountsPayableRelatedtoIntangibleAssetsPropertyPlantandEquipment	-15224000	USD
CY2018	crto	Increase Decreasein Accounts Payable Relatedto Intangible Assets Property Plantand Equipment IncreaseDecreaseinAccountsPayableRelatedtoIntangibleAssetsPropertyPlantandEquipment	-8494000	USD
CY2020	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	1176000	USD
CY2019	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	4582000	USD
CY2018	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	101180000	USD
CY2020	crto	Paymentsfor Proceedsfrom Changein Other Financial Noncurrent Assets PaymentsforProceedsfromChangeinOtherFinancialNoncurrentAssets	34448000	USD
CY2019	crto	Paymentsfor Proceedsfrom Changein Other Financial Noncurrent Assets PaymentsforProceedsfromChangeinOtherFinancialNoncurrentAssets	1366000	USD
CY2018	crto	Paymentsfor Proceedsfrom Changein Other Financial Noncurrent Assets PaymentsforProceedsfromChangeinOtherFinancialNoncurrentAssets	59000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-101093000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-103888000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-226717000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	153188000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	167344000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1022000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	964000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1727000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1691000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1473000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	43655000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	58588000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	80000000	USD
CY2020	crto	Proceedsfrom Paymentsfor Changein Other Financial Liabilities ProceedsfromPaymentsforChangeinOtherFinancialLiabilities	-1663000	USD
CY2019	crto	Proceedsfrom Paymentsfor Changein Other Financial Liabilities ProceedsfromPaymentsforChangeinOtherFinancialLiabilities	-1192000	USD
CY2018	crto	Proceedsfrom Paymentsfor Changein Other Financial Liabilities ProceedsfromPaymentsforChangeinOtherFinancialLiabilities	16815000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-57747000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-59111000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-62676000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	42732000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-5496000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-21018000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	69248000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	54337000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-49685000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	418763000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	364426000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	414111000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	488011000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	418763000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	364426000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	17610000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	52093000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	67045000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	2155000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1403000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	1695000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27100000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	39600000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates </span></div><div style="margin-bottom:3pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of our Consolidated Financial Statements requires the use of estimates, assumptions and judgments that affect the reported amounts of assets, liabilities, and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amount of revenue and expenses during the period. We base our estimates and assumptions on historical experience and other factors that we believe to be reasonable under the circumstances. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates. </span></div><div style="margin-bottom:3pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On an on-going basis, management evaluates its estimates, primarily those related to: (1) revenue recognition criteria (2) allowances for credit losses, (3) research tax credits (4) income taxes, including i) recognition of deferred tax assets arising from the subsidiaries projected taxable profit for future years, ii) evaluation of uncertain tax positions associated with our transfer pricing policy and iii) recognition of income tax position in respect with tax reforms recently enacted in countries we operate, (5) assumptions used in valuing acquired assets and assumed liabilities in business combinations, (6) assumptions used in the valuation of goodwill, intangible assets and right of use assets - operating lease, and (7) assumptions used in the valuation model to determine the fair value of share-based compensation plan.</span></div><div style="margin-bottom:3pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The severity, magnitude, duration and after effects of the COVID-19 pandemic on general economic conditions increase uncertainty associated with these estimates, in particular those related to allowance for credit losses, assumptions used in the valuation of goodwill and estimates relating to income taxes.</span></div>
CY2020	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Property, Plant and Equipment and Impairment of Long-lived Assets</span></div><div style="margin-bottom:12pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset is impaired or the estimated useful life is no longer appropriate. If indicators of impairment exist and the undiscounted projected cash flows associated with an asset are less than the carrying amount of the asset, an impairment loss is recorded to write the asset down to its estimated fair value. Fair value is estimated based on discounted future cash flows.</span></div>
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-top:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div style="margin-bottom:12pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents and accounts receivable. The Company’s cash and cash equivalents are held and foreign exchange contracts are transacted with major financial institutions that the Company's management has assessed to be of high credit quality. The Company has not experienced any losses in such accounts.</span></div><div style="margin-bottom:12pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company mitigates its credit risk with respect to accounts receivable by performing credit evaluations and monitoring agencies' and advertisers' accounts receivable balances. As of December 31, 2020 and 2019 no customer accounted for 10% or more of accounts receivable. During the years ended December 31, 2020, 2019 and 2018, no single customer represented 10% or more of revenue.</span></div>
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3500000	shares
CY2019Q1	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1600000	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3900000	shares
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	474055000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	481732000	USD
CY2020Q4	crto	Prepaid Other Taxesand Other Taxes Receivable PrepaidOtherTaxesandOtherTaxesReceivable	69987000	USD
CY2019Q4	crto	Prepaid Other Taxesand Other Taxes Receivable PrepaidOtherTaxesandOtherTaxesReceivable	60924000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	21405000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	17225000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	41809000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	0	USD
CY2020Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	18109000	USD
CY2019Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	21747000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	625365000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	581628000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-23800000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-9900000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	41809000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	0	USD
CY2020Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	162457000	USD
CY2019Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	189119000	USD
CY2020Q4	us-gaap	Cash Cash	325554000	USD
CY2019Q4	us-gaap	Cash Cash	229644000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	488011000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	418763000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	513954000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	497800000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	39899000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16068000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	474055000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	481732000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16068000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	25918000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	20818000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	30818000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11072000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	17656000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	11555000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	20811000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	11956000	USD
CY2020	crto	Allowance For Doubtful Accounts Change In Consolidation Scope AllowanceForDoubtfulAccountsChangeInConsolidationScope	0	USD
CY2019	crto	Allowance For Doubtful Accounts Change In Consolidation Scope AllowanceForDoubtfulAccountsChangeInConsolidationScope	0	USD
CY2018	crto	Allowance For Doubtful Accounts Change In Consolidation Scope AllowanceForDoubtfulAccountsChangeInConsolidationScope	-150000	USD
CY2020	crto	Allowance For Doubtful Accounts Receivable Currency Translation Adjustment AllowanceForDoubtfulAccountsReceivableCurrencyTranslationAdjustment	-1046000	USD
CY2019	crto	Allowance For Doubtful Accounts Receivable Currency Translation Adjustment AllowanceForDoubtfulAccountsReceivableCurrencyTranslationAdjustment	111000	USD
CY2018	crto	Allowance For Doubtful Accounts Receivable Currency Translation Adjustment AllowanceForDoubtfulAccountsReceivableCurrencyTranslationAdjustment	750000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	39899000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16068000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	25918000	USD
CY2020	us-gaap	Proceeds Accounts Receivable Previously Written Off Recovery ProceedsAccountsReceivablePreviouslyWrittenOffRecovery	3600000	USD
CY2020Q4	crto	Prepayments To Suppliers PrepaymentsToSuppliers	5613000	USD
CY2019Q4	crto	Prepayments To Suppliers PrepaymentsToSuppliers	5109000	USD
CY2020Q4	crto	Other Debtors OtherDebtors	5991000	USD
CY2019Q4	crto	Other Debtors OtherDebtors	4225000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	9801000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	7891000	USD
CY2020Q4	crto	Other Assetsand Receivables Gross Current OtherAssetsandReceivablesGrossCurrent	21405000	USD
CY2019Q4	crto	Other Assetsand Receivables Gross Current OtherAssetsandReceivablesGrossCurrent	17225000	USD
CY2020Q4	crto	Other Assetsand Receivables Current OtherAssetsandReceivablesCurrent	21405000	USD
CY2019Q4	crto	Other Assetsand Receivables Current OtherAssetsandReceivablesCurrent	17225000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	184013000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	70542000	USD
CY2019	us-gaap	Property Plant And Equipment Disposals PropertyPlantAndEquipmentDisposals	1915000	USD
CY2019	us-gaap	Depreciation Depreciation	56599000	USD
CY2019	crto	Property Plantand Equipment Changein Scope PropertyPlantandEquipmentChangeinScope	3000	USD
CY2019	crto	Property Plant And Equipment Currency Translation Adjustment Gain Loss PropertyPlantAndEquipmentCurrencyTranslationAdjustmentGainLoss	-1883000	USD
CY2019	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	0	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	194161000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	452679000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	258518000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	194161000	USD
CY2020	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	52867000	USD
CY2020	us-gaap	Property Plant And Equipment Disposals PropertyPlantAndEquipmentDisposals	4313000	USD
CY2020	us-gaap	Depreciation Depreciation	63297000	USD
CY2020	crto	Property Plantand Equipment Changein Scope PropertyPlantandEquipmentChangeinScope	6000	USD
CY2020	crto	Property Plant And Equipment Currency Translation Adjustment Gain Loss PropertyPlantAndEquipmentCurrencyTranslationAdjustmentGainLoss	10081000	USD
CY2020	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	0	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	189505000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	482859000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	293354000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	112036000	USD
CY2019	crto	Intangible Assets Acquired IntangibleAssetsAcquired	12175000	USD
CY2019	crto	Intangible Assets Disposed IntangibleAssetsDisposed	0	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	36888000	USD
CY2019	crto	Intangible Assets Changein Consolidation Scope IntangibleAssetsChangeinConsolidationScope	111000	USD
CY2019	crto	Intangible Assets Foreign Currency Translation Gain Loss IntangibleAssetsForeignCurrencyTranslationGainLoss	548000	USD
CY2019	crto	Intangible Assets Transfers Increase Decrease IntangibleAssetsTransfersIncreaseDecrease	0	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	86886000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	203294000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	116408000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	86886000	USD
CY2019	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	2	business
CY2020	crto	Intangible Assets Acquired IntangibleAssetsAcquired	14415000	USD
CY2020	crto	Intangible Assets Disposed IntangibleAssetsDisposed	0	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	24940000	USD
CY2020	crto	Intangible Assets Changein Consolidation Scope IntangibleAssetsChangeinConsolidationScope	64000	USD
CY2020	crto	Intangible Assets Foreign Currency Translation Gain Loss IntangibleAssetsForeignCurrencyTranslationGainLoss	-3319000	USD
CY2020	crto	Intangible Assets Transfers Increase Decrease IntangibleAssetsTransfersIncreaseDecrease	0	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	79744000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	227233000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	147489000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	24040000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	21081000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	17530000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	9467000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	7626000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	79744000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	312881000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	5277000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-1058000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	317100000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2807000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	5898000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	325805000	USD
CY2020	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	1	business
CY2020Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2018Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2640000	USD
CY2019	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	4258000	USD
CY2019	crto	Loss Contingency Accrual Provision Used LossContingencyAccrualProvisionUsed	82000	USD
CY2019	crto	Loss Contingency Accrual Provision Released Not Used LossContingencyAccrualProvisionReleasedNotUsed	402000	USD
CY2019	crto	Loss Contingency Accrual Foreign Currency Translation Gain Loss LossContingencyAccrualForeignCurrencyTranslationGainLoss	-29000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	6385000	USD
CY2020	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	1501000	USD
CY2020	crto	Loss Contingency Accrual Provision Used LossContingencyAccrualProvisionUsed	831000	USD
CY2020	crto	Loss Contingency Accrual Provision Released Not Used LossContingencyAccrualProvisionReleasedNotUsed	2240000	USD
CY2020	crto	Loss Contingency Accrual Foreign Currency Translation Gain Loss LossContingencyAccrualForeignCurrencyTranslationGainLoss	111000	USD
CY2020	crto	Loss Contingency Accrual Other Increase Decrease LossContingencyAccrualOtherIncreaseDecrease	-2676000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2250000	USD
CY2020Q4	crto	Longterm Debt Maturities Repaymentsof Principalin Year Six LongtermDebtMaturitiesRepaymentsofPrincipalinYearSix		USD
CY2020Q4	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	2250000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual Carrying Value Noncurrent LossContingencyAccrualCarryingValueNoncurrent	0	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1505000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1505000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo		USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree		USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour		USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive		USD
CY2020Q4	crto	Other Financial Liabilities OtherFinancialLiabilities	845000	USD
CY2020Q4	crto	Other Financial Liabilities Duein Next Fiscal Year OtherFinancialLiabilitiesDueinNextFiscalYear	459000	USD
CY2020Q4	crto	Other Financial Liabilities Duein Second Year OtherFinancialLiabilitiesDueinSecondYear	45000	USD
CY2020Q4	crto	Other Financial Liabilities Duein Third Year OtherFinancialLiabilitiesDueinThirdYear	0	USD
CY2020Q4	crto	Other Financial Liabilities Duein Fourth Year OtherFinancialLiabilitiesDueinFourthYear	0	USD
CY2020Q4	crto	Other Financial Liabilities Duein Fifth Year OtherFinancialLiabilitiesDueinFifthYear	341000	USD
CY2020Q4	crto	Other Financial Liabilities Duein Sixth Year OtherFinancialLiabilitiesDueinSixthYear	0	USD
CY2020Q4	crto	Financial Derivatives FinancialDerivatives	925000	USD
CY2020Q4	crto	Derivative Liability Duein Next Fiscal Year DerivativeLiabilityDueinNextFiscalYear	925000	USD
CY2020Q4	crto	Financial Liabilities FinancialLiabilities	3275000	USD
CY2020Q4	crto	Financial Liabilities Duein Next Fiscal Year FinancialLiabilitiesDueinNextFiscalYear	2889000	USD
CY2020Q4	crto	Financial Liabilities Duein Second Year FinancialLiabilitiesDueinSecondYear	45000	USD
CY2020Q4	crto	Financial Liabilities Duein Third Year FinancialLiabilitiesDueinThirdYear	0	USD
CY2020Q4	crto	Financial Liabilities Duein Fourth Year FinancialLiabilitiesDueinFourthYear	0	USD
CY2020Q4	crto	Financial Liabilities Duein Fifth Year FinancialLiabilitiesDueinFifthYear	341000	USD
CY2020Q4	crto	Financial Liabilities Duein Sixth Year FinancialLiabilitiesDueinSixthYear	0	USD
CY2020Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	13744000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	55033000	USD
CY2020Q4	us-gaap	Short Term Lease Cost ShortTermLeaseCost	822000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1154000	USD
CY2020Q4	us-gaap	Variable Lease Cost VariableLeaseCost	14000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	444000	USD
CY2020Q4	us-gaap	Sublease Income SubleaseIncome	242000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	756000	USD
CY2020Q4	us-gaap	Lease Cost LeaseCost	14338000	USD
CY2020	us-gaap	Lease Cost LeaseCost	55875000	USD
CY2019Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	19002000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	63506000	USD
CY2019Q4	us-gaap	Short Term Lease Cost ShortTermLeaseCost	605000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	4122000	USD
CY2019Q4	us-gaap	Variable Lease Cost VariableLeaseCost	-817000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	599000	USD
CY2019Q4	us-gaap	Sublease Income SubleaseIncome	378000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	2916000	USD
CY2019Q4	us-gaap	Lease Cost LeaseCost	18412000	USD
CY2019	us-gaap	Lease Cost LeaseCost	65311000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	53565000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	39393000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	22245000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	10698000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7591000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2424000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	135916000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4521000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	131395000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	61343000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	54259000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	57550000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	15714000	USD
CY2020Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	12234000	USD
CY2019Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	13618000	USD
CY2020Q4	us-gaap	Notes Payable Current NotesPayableCurrent	14433000	USD
CY2019Q4	us-gaap	Notes Payable Current NotesPayableCurrent	16420000	USD
CY2020Q4	crto	Accounts Payable Capital Expenditures AccountsPayableCapitalExpenditures	4721000	USD
CY2019Q4	crto	Accounts Payable Capital Expenditures AccountsPayableCapitalExpenditures	4408000	USD
CY2020Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	1918000	USD
CY2019Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	1213000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	84000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	227000	USD
CY2020Q4	crto	Accounts Payable Accrued Liabilities Employeerelated Payablesand Taxes Payable Current AccountsPayableAccruedLiabilitiesEmployeerelatedPayablesandTaxesPayableCurrent	33390000	USD
CY2019Q4	crto	Accounts Payable Accrued Liabilities Employeerelated Payablesand Taxes Payable Current AccountsPayableAccruedLiabilitiesEmployeerelatedPayablesandTaxesPayableCurrent	35886000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	8485000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	5537000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	5149000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	2232000	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	1556000	USD
CY2018	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	1690000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	95000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	113000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	86000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	5214000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-1374000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1235000	USD
CY2020	crto	Defined Benefit Plan Changein Consolidation Scope DefinedBenefitPlanChangeinConsolidationScope	0	USD
CY2019	crto	Defined Benefit Plan Changein Consolidation Scope DefinedBenefitPlanChangeinConsolidationScope	0	USD
CY2018	crto	Defined Benefit Plan Changein Consolidation Scope DefinedBenefitPlanChangeinConsolidationScope	98000	USD
CY2020	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-569000	USD
CY2019	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	95000	USD
CY2018	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	251000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	6167000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	8485000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	5537000	USD
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0085
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.011
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.021
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.050
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.050
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.050
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	16211000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	15686000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	16912000	USD
CY2018Q4	us-gaap	Shares Outstanding SharesOutstanding	64249084	shares
CY2019	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	83266	shares
CY2019	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1594288	shares
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	444554	shares
CY2019Q4	us-gaap	Shares Outstanding SharesOutstanding	62293508	shares
CY2020	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	231784	shares
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Shares Authorized For Issuance DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance	156859	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1728863	shares
CY2020Q4	us-gaap	Shares Outstanding SharesOutstanding	60639570	shares
CY2019Q1	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1594288	shares
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1247571000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1314947000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1334334000	USD
CY2020	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	137028000	USD
CY2019	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	117533000	USD
CY2018	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	131744000	USD
CY2020	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	55935000	USD
CY2019	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	44866000	USD
CY2018	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	67346000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	1384599000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	1432480000	USD
CY2018	us-gaap	Cost Of Revenue CostOfRevenue	1466078000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	378957000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	436351000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	451428000	USD
CY2020	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	278934000	USD
CY2019	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	306862000	USD
CY2018	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	296336000	USD
CY2020	us-gaap	Severance Costs1 SeveranceCosts1	5251000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	12504000	USD
CY2018	us-gaap	Severance Costs1 SeveranceCosts1	6922000	USD
CY2020	crto	Social Charges SocialCharges	75552000	USD
CY2019	crto	Social Charges SocialCharges	76594000	USD
CY2018	crto	Social Charges SocialCharges	77284000	USD
CY2020	crto	Other Social Expenses OtherSocialExpenses	7091000	USD
CY2019	crto	Other Social Expenses OtherSocialExpenses	15513000	USD
CY2018	crto	Other Social Expenses OtherSocialExpenses	14375000	USD
CY2020	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	28771000	USD
CY2019	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	40999000	USD
CY2018	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	66600000	USD
CY2020	crto	Profit Sharing Expense ProfitSharingExpense	0	USD
CY2019	crto	Profit Sharing Expense ProfitSharingExpense	92000	USD
CY2018	crto	Profit Sharing Expense ProfitSharingExpense	598000	USD
CY2020	crto	Research Tax Credit ResearchTaxCredit	16642000	USD
CY2019	crto	Research Tax Credit ResearchTaxCredit	16213000	USD
CY2018	crto	Research Tax Credit ResearchTaxCredit	10687000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	378957000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	436351000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	451428000	USD
CY2020	crto	Sharebased Compensation Arrangementby Sharebased Payment Award Exercise Price Average Percentof Closing Share Pricesforthe Last20 Trading Days SharebasedCompensationArrangementbySharebasedPaymentAwardExercisePriceAveragePercentofClosingSharePricesfortheLast20TradingDays	0.95
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7405216	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	4146709	shares
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	137348	shares
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	1362873	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	2084102	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7967602	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	3586098	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	83266	shares
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	1219112	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	2712801	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7538521	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	2824915	shares
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	223934	shares
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	1478894	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	1600759	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	3600	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7056249	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7967602	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	26.94
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2241036	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	25.39
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y8M12D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7538521	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.09
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	1834243	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	24.12
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y2M12D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7056249	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	26.81
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	1607995	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	24.87
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y9M18D
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	27101000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	39613000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	65117000	USD
CY2020	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	28771000	USD
CY2019	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	40999000	USD
CY2018	crto	Sharebased Compensation Expense Employeeand Non Employee SharebasedCompensationExpenseEmployeeandNonEmployee	66600000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	1117000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	1528000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	1055000	USD
CY2020	us-gaap	Interest Expense InterestExpense	2811000	USD
CY2019	us-gaap	Interest Expense InterestExpense	2383000	USD
CY2018	us-gaap	Interest Expense InterestExpense	2107000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	2381000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	1756000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	1796000	USD
CY2020	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	430000	USD
CY2019	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	627000	USD
CY2018	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	311000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-150000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-4425000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3945000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-95000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-469000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-87000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1939000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5749000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5084000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1900000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5700000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	28477000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	24078000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	54301000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	16379000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8410000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	37223000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	12098000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	15668000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	17078000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3720000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15418000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-8157000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-4548000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	14109000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-11155000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	8268000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1309000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	2998000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39496000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46144000	USD
CY2020	crto	Current Federal Tax Expense Benefit Value Added Taxes CurrentFederalTaxExpenseBenefitValueAddedTaxes	5100000	USD
CY2019	crto	Current Federal Tax Expense Benefit Value Added Taxes CurrentFederalTaxExpenseBenefitValueAddedTaxes	5500000	USD
CY2018	crto	Current Federal Tax Expense Benefit Value Added Taxes CurrentFederalTaxExpenseBenefitValueAddedTaxes	5900000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3202
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	106886000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	135465000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	142023000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3202
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3443
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.3443
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	34225000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	46641000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	48899000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	5298000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	10851000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	10211000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	11604000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	13432000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	17674000	USD
CY2020	crto	Effective Income Tax Rate Reconciliation Beat Waiver Election EffectiveIncomeTaxRateReconciliationBEATWaiverElection	18640000	USD
CY2019	crto	Effective Income Tax Rate Reconciliation Beat Waiver Election EffectiveIncomeTaxRateReconciliationBEATWaiverElection	15962000	USD
CY2018	crto	Effective Income Tax Rate Reconciliation Beat Waiver Election EffectiveIncomeTaxRateReconciliationBEATWaiverElection	0	USD
CY2020	crto	Effective Income Tax Rate Reconciliation Other Permanent Differences Amount EffectiveIncomeTaxRateReconciliationOtherPermanentDifferencesAmount	-8979000	USD
CY2019	crto	Effective Income Tax Rate Reconciliation Other Permanent Differences Amount EffectiveIncomeTaxRateReconciliationOtherPermanentDifferencesAmount	7667000	USD
CY2018	crto	Effective Income Tax Rate Reconciliation Other Permanent Differences Amount EffectiveIncomeTaxRateReconciliationOtherPermanentDifferencesAmount	11982000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	6026000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2713000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11664000	USD
CY2020	crto	Effective Income Tax Rate Reconciliation Loss Carryforward Recognition Amount EffectiveIncomeTaxRateReconciliationLossCarryforwardRecognitionAmount	2511000	USD
CY2019	crto	Effective Income Tax Rate Reconciliation Loss Carryforward Recognition Amount EffectiveIncomeTaxRateReconciliationLossCarryforwardRecognitionAmount	20636000	USD
CY2018	crto	Effective Income Tax Rate Reconciliation Loss Carryforward Recognition Amount EffectiveIncomeTaxRateReconciliationLossCarryforwardRecognitionAmount	4461000	USD
CY2020	crto	Effective Income Tax Rate Reconciliation Value Added Taxes Amount EffectiveIncomeTaxRateReconciliationValueAddedTaxesAmount	3464000	USD
CY2019	crto	Effective Income Tax Rate Reconciliation Value Added Taxes Amount EffectiveIncomeTaxRateReconciliationValueAddedTaxesAmount	3632000	USD
CY2018	crto	Effective Income Tax Rate Reconciliation Value Added Taxes Amount EffectiveIncomeTaxRateReconciliationValueAddedTaxesAmount	3849000	USD
CY2020	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	13402000	USD
CY2019	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	15946000	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	38577000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3963000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-5441000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	377000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-7609000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2323000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	4948000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39496000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46144000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.301
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.292
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.325
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	23124000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15418000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	163000	USD
CY2019	crto	Deferred Tax Asset Liability Activity Acquisition Divestitures And Consolidations Increase Decrease DeferredTaxAssetLiabilityActivityAcquisitionDivestituresAndConsolidationsIncreaseDecrease	0	USD
CY2019	crto	Deferred Tax Asset Liability Activity Other Activity Adjustment DeferredTaxAssetLiabilityActivityOtherActivityAdjustment	11105000	USD
CY2019	crto	Deferred Tax Asset Liability Activity Currency Translation Adjustments Gain Loss DeferredTaxAssetLiabilityActivityCurrencyTranslationAdjustmentsGainLoss	-261000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	18713000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	18713000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3720000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-522000	USD
CY2020	crto	Deferred Tax Asset Liability Activity Acquisition Divestitures And Consolidations Increase Decrease DeferredTaxAssetLiabilityActivityAcquisitionDivestituresAndConsolidationsIncreaseDecrease	-48000	USD
CY2020	crto	Deferred Tax Asset Liability Activity Other Activity Adjustment DeferredTaxAssetLiabilityActivityOtherActivityAdjustment	0	USD
CY2020	crto	Deferred Tax Asset Liability Activity Currency Translation Adjustments Gain Loss DeferredTaxAssetLiabilityActivityCurrencyTranslationAdjustmentsGainLoss	156000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	14579000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	9200000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	71679000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	90745000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	88644000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60876480	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64305965	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	66456890	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.18
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.41
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2020	us-gaap	Net Income Loss NetIncomeLoss	71679000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	90745000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	88644000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	60876480	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64305965	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	66456890	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	796609	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	978521	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	786932	shares
CY2020	crto	Incremental Common Shares Attributableto Dilutive Effectof Sharebased Payment Arrangements Options And Bspce IncrementalCommonSharesAttributabletoDilutiveEffectofSharebasedPaymentArrangementsOptionsAndBSPCE	133177	shares
CY2019	crto	Incremental Common Shares Attributableto Dilutive Effectof Sharebased Payment Arrangements Options And Bspce IncrementalCommonSharesAttributabletoDilutiveEffectofSharebasedPaymentArrangementsOptionsAndBSPCE	279270	shares
CY2018	crto	Incremental Common Shares Attributableto Dilutive Effectof Sharebased Payment Arrangements Options And Bspce IncrementalCommonSharesAttributabletoDilutiveEffectofSharebasedPaymentArrangementsOptionsAndBSPCE	382512	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	12327	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	34832	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	36570	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	61818593	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	65598588	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	67662904	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.31
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1796763	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1262819	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1504718	shares
CY2020Q4	us-gaap	Number Of Countries In Which Entity Operates NumberOfCountriesInWhichEntityOperates	3	market
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2300314000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2261516000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2072617000	USD
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	281047000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	269249000	USD

Files In Submission

Name	View Source	Status
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0001576427-21-000008-index.html	Edgar Link	pending
0001576427-21-000008.txt	Edgar Link	pending
0001576427-21-000008-xbrl.zip	Edgar Link	pending
amendmenttoconsultingagr.htm	Edgar Link	pending
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crto-20201231.htm	Edgar Link	pending
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crto-20201231_htm.xml	Edgar Link	completed
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exhibit211subsidiariesfy20.htm	Edgar Link	pending
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$CRTO
Criteo S.A. Stock $crto

2019 Q4 Form 10-K Financial Statement

#000157642721000008 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CRTO Criteo S.A. Stock $crto

2019 Q4 Form 10-K Financial Statement

#000157642721000008 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CRTO
Criteo S.A. Stock $crto