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v3.26.1

REVENUE RECOGNITION - Schedule of Activity in the Liability of Customer Credits (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2026 USD ($)
Customer Credits [Roll Forward] |
Customer credits, beginning balance | $ 25,942
Credits issued | 64,257
Credits redeemed | (53,869)
Breakage revenue recognized | (2,892)
Foreign currency translation | (93)
Customer credits, ending balance | $ 33,345
Customer credit, period to use within issuance | 1 year

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- Definition Customer Credit, Period To Use Within Issuance + References No definition available. + Details
Name: | grpn_CustomerCreditPeriodToUseWithinIssuance
Namespace Prefix: | grpn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- 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

X
- 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_CustomerCreditsCurrent
Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

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