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GOODWILL AND LONG-LIVED ASSETS - Schedule of Impairment Charges Presented Within Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Impaired Long-Lived Assets Held and Used [Line Items] |  |
Impairment of long-lived assets | $ 13,903 | $ 36,254
Long-lived asset impairment |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |
Impairment of long-lived assets | 0 | 22,351
Restructuring and related charges |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |
Impairment of long-lived assets | $ 13,903 | $ 13,903

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- Definition Asset Impairment Charges, Excluding Goodwill Impairment + References No definition available. + Details
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Namespace Prefix: | grpn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_RestructuringChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |