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Income Taxes Text (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income (Loss) from Continuing Operations before Income Taxes, Domestic | $ (20,057,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ 62,021,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ 88,638,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Income (Loss) from Continuing Operations before Income Taxes, Foreign | (28,138,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (80,930,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | 6,304,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
(Loss) income before provision for income taxes | (48,195,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | (18,909,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 94,942,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Current Income Tax Expense (Benefit) | 26,830,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 88,092,000 us-gaap_CurrentIncomeTaxExpenseBenefit | 153,624,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred income taxes | (11,106,000)us-gaap_DeferredIncomeTaxExpenseBenefit | (18,055,000)us-gaap_DeferredIncomeTaxExpenseBenefit | (7,651,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes | 15,724,000 us-gaap_IncomeTaxExpenseBenefit | 70,037,000 us-gaap_IncomeTaxExpenseBenefit | 145,973,000 us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
U.S. federal income tax (benefit) provision at statutory rate | (16,868,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (6,618,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 33,230,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount | 4,815,000 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | 14,299,000 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | 10,565,000 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Effective Income Tax Rate Reconciliation, Disposition of Asset, Amount |  |  | 17,404,000 us-gaap_IncomeTaxReconciliationDispositionOfAssets
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | (10,051,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (5,361,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 3,965,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 23,515,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 24,404,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 29,249,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 178,000 us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | 837,000 us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (487,000)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 13,098,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | 35,158,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | 31,011,000 us-gaap_IncomeTaxReconciliationOtherAdjustments
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount | 6,503,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 9,000,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 14,641,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount | (4,693,000)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | (4,650,000)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | 0 us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | (773,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | 2,968,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | 6,395,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther
Components of Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals | 32,379,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | 65,356,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 6,911,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 13,462,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
Deferred Tax Assets, Operating Loss Carryforwards | 221,674,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 152,271,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Deferred Tax Assets, Goodwill and Intangible Assets | 11,910,000 us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets | 30,039,000 us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets |
Deferred Tax Assets, Investments | 1,441,000 us-gaap_DeferredTaxAssetsInvestments | 3,730,000 us-gaap_DeferredTaxAssetsInvestments |
Deferred Tax Assets, Unrealized Currency Losses | 5,011,000 us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses | 0 us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses |
Deferred Tax Assets, Other | 2,610,000 us-gaap_DeferredTaxAssetsOther | 1,692,000 us-gaap_DeferredTaxAssetsOther |
Deferred Tax Assets, Gross | 281,936,000 us-gaap_DeferredTaxAssetsGross | 266,550,000 us-gaap_DeferredTaxAssetsGross |
Deferred Tax Assets, Valuation Allowance | (205,486,000)us-gaap_DeferredTaxAssetsValuationAllowance | (173,577,000)us-gaap_DeferredTaxAssetsValuationAllowance |
Deferred Tax Assets, Net of Valuation Allowance | 76,450,000 us-gaap_DeferredTaxAssetsNet | 92,973,000 us-gaap_DeferredTaxAssetsNet |
Deferred Tax Liabilities, Unrealized Currency Transaction Gains | 0 us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains | (3,034,000)us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains |
Deferred Tax Liabilities, Prepaid Expenses | (1,455,000)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses | (1,078,000)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses |
Deferred Tax Liabilities, Property, Plant and Equipment | (25,159,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (19,239,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Deferred Tax Liabilities, Tax Deferred Income | (25,013,000)us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome | (64,154,000)us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome |
Deferred Tax Liabilities, Gross | (51,627,000)us-gaap_DeferredIncomeTaxLiabilities | (87,505,000)us-gaap_DeferredIncomeTaxLiabilities |
Deferred Tax Assets, Net | 24,823,000 us-gaap_DeferredTaxAssetsLiabilitiesNet | 5,468,000 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Accumulated deficit | (921,960,000)us-gaap_RetainedEarningsAccumulatedDeficit | (848,870,000)us-gaap_RetainedEarningsAccumulatedDeficit |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | 9,600,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 121,200,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 270,500,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 714,900,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Unrecognized tax benefits, beginning balance | 110,305,000 us-gaap_UnrecognizedTaxBenefits | 85,481,000 us-gaap_UnrecognizedTaxBenefits | 55,127,000 us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 5,489,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 10,494,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 602,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | (27,875,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | (2,103,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | (790,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 17,348,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 14,565,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 29,465,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation | (6,946,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation |  |
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation |  | 1,868,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation | 1,077,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation
Unrecognized tax benefits, ending balance | 98,321,000 us-gaap_UnrecognizedTaxBenefits | 110,305,000 us-gaap_UnrecognizedTaxBenefits | 85,481,000 us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 72,300,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 80,000,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 39,300,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Income Tax Examination, Penalties and Interest Expense | 1,100,000 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 3,300,000 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 2,300,000 us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense
Income Tax Examination, Penalties and Interest Accrued | 5,700,000 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued | 5,300,000 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 21,000,000 us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations |  |
Increase (Decrease) in Income Taxes | 24,400,000 us-gaap_IncreaseDecreaseInIncomeTaxes |  |
Potential Change in Unrecognized Tax Benefits | 15,600,000 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound |  |
Undistributed Earnings of Foreign Subsidiaries | 271,100,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |  |
Current portion of unamortized tax effects on intercompany transactions | 14,193,000 us-gaap_PrepaidTaxes | 28,502,000 us-gaap_PrepaidTaxes |
Prepaid Expenses and Other Current Assets [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Current portion of unamortized tax effects on intercompany transactions | 14,193,000 us-gaap_PrepaidTaxes / us-gaap_BalanceSheetLocationAxis = us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember | 28,500,000 us-gaap_PrepaidTaxes / us-gaap_BalanceSheetLocationAxis = us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember |
Other Assets [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Current portion of unamortized tax effects on intercompany transactions |  | 20,400,000 us-gaap_PrepaidTaxes / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember |
Future amortization through 2015 [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Current portion of unamortized tax effects on intercompany transactions | 14,200,000 us-gaap_PrepaidTaxes / grpn_AmortizationPeriodAxis = grpn_Futureamortizationthrough2015Member |  |
Domestic Tax Authority [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Increase (Decrease) in Income Taxes | 7,700,000 us-gaap_IncreaseDecreaseInIncomeTaxes / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Foreign Tax Authority [Member] |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Increase (Decrease) in Income Taxes | 16,700,000 us-gaap_IncreaseDecreaseInIncomeTaxes / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
UNITED STATES |  |  |
Current Income Tax Expense (Benefit) | (3,518,000)us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US | 22,321,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US | 41,551,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US
Deferred income taxes | (5,132,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US | 4,675,000 us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US | (2,977,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = country_US
State and Local Jurisdiction [Member] |  |  |
Current Income Tax Expense (Benefit) | 69,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 1,693,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 4,778,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred income taxes | (742,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (5,687,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (236,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
International [Domain] |  |  |
Current Income Tax Expense (Benefit) | 30,279,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain | 64,078,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain | 107,295,000 us-gaap_CurrentIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain
Deferred income taxes | $ (5,232,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain | $ (17,043,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain | $ (4,438,000)us-gaap_DeferredIncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = grpn_InternationalDomain

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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 + Details
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