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VARIABLE INTEREST ENTITY (Details) | 12 Months Ended
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Dec. 31, 2021
Variable Interest Entity [Abstract] |
Variable interest entity, ownership percentage | 50.00%

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- Definition Variable Interest Entity [Abstract] + References No definition available. + Details
Name: | grpn_VariableInterestEntityAbstract
Namespace Prefix: | grpn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration