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v3.21.1

REVENUE RECOGNITION - Customer Credits (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 USD ($)
Customer Credits [Roll Forward] |
Customer credits, beginning balance | $ 61,006
Credits issued | 50,051
Credits redeemed | (41,283)
Breakage revenue recognized | (6,205)
Foreign currency translation | (745)
Customer credits, ending balance | $ 62,824

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- Definition Credits to customers that can be applied to future purchases on our online marketplaces. Credits are primarily issued for refunds or for customer relationship purposes. + References No definition available. + Details
Name: | grpn_CustomerCredits
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Customer Credits, Breakage Revenue Recognized + References No definition available. + Details
Name: | grpn_CustomerCreditsBreakageRevenueRecognized
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Customer Credits, Credits Issued + References No definition available. + Details
Name: | grpn_CustomerCreditsCreditsIssued
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Customer Credits, Credits Redeemed + References No definition available. + Details
Name: | grpn_CustomerCreditsCreditsRedeemed
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Customer Credits, Foreign Currency Translation Gain (Loss) + References No definition available. + Details
Name: | grpn_CustomerCreditsForeignCurrencyTranslationGainLoss
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Customer Credits + References No definition available. + Details
Name: | grpn_CustomerCreditsRollForward
Namespace Prefix: | grpn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration