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v2.4.1.9

Stockholders' Equity Initial Public Offering, Convertible Preferred Stock and Common Stock (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 NumberofClasses | Dec. 31, 2014
Preferred Stock, Shares Authorized |  | 50,000,000 us-gaap_PreferredStockSharesAuthorized
Classes of common stock, number | 3 grpn_ClassesOfCommonStockNumber |

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- Definition The number of classes of common stock + References No definition available. + Details
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Namespace Prefix: | grpn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant