Description of Business and Basis of Presentation	6 Months Ended
Jun. 30, 2013
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract]
Description of Business and Basis of Presentation [Text Block]	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Company Information Groupon, Inc. and subsidiaries (the "Company") is a local commerce marketplace (www.groupon.com) that connects merchants to consumers by offering goods and services at a discount. The Company also offers deals on products for which it acts as the merchant of record. The Company, which commenced operations in October 2008, sends emails to its subscribers each day with discounted offers for goods and services that are targeted by location and personal preferences. Consumers also access deals directly through the Company's website and mobile application. The Company's operations are organized into three principal segments: North America, EMEA, which is comprised of Europe, Middle East and Africa, and the remainder of the Company's international operations ("Rest of World"). During the second quarter of 2013, the Company changed the composition of its operating segments to separate its former International segment between EMEA and Rest of World. See Note 11 "Segment Information" for further information. Unaudited Interim Financial Information The Company has prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial reporting. These condensed consolidated financial statements are unaudited and, in the Company's opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the Company's condensed consolidated balance sheets, statements of operations, comprehensive income, cash flows and stockholders' equity for the periods presented. Operating results for the periods presented are not necessarily indicative of the results to be expected for the full year ending December 31, 2013. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been omitted in accordance with the rules and regulations of the SEC. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012, as filed with the SEC on February 27, 2013. Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The Company's condensed consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly‑owned subsidiaries and majority‑owned subsidiaries over which the Company exercises control and variable interest entities for which the Company has determined that it is the primary beneficiary. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as “Noncontrolling interests" and "Redeemable noncontrolling interests." Equity investments in entities in which the Company does not have a controlling financial interest are accounted for under either the equity method or cost method of accounting, as appropriate. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are utilized for, but not limited to, stock‑based compensation, income taxes, valuation of acquired goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

Company Information

Groupon, Inc. and subsidiaries (the "Company") is a local commerce marketplace (www.groupon.com) that connects merchants to consumers by offering goods and services at a discount. The Company also offers deals on products for which it acts as the merchant of record. The Company, which commenced operations in October 2008, sends emails to its subscribers each day with discounted offers for goods and services that are targeted by location and personal preferences. Consumers also access deals directly through the Company's website and mobile application.

The Company's operations are organized into three principal segments: North America, EMEA, which is comprised of Europe, Middle East and Africa, and the remainder of the Company's international operations ("Rest of World"). During the second quarter of 2013, the Company changed the composition of its operating segments to separate its former International segment between EMEA and Rest of World. See Note 11 "Segment Information" for further information.

Unaudited Interim Financial Information

The Company has prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial reporting. These condensed consolidated financial statements are unaudited and, in the Company's opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the Company's condensed consolidated balance sheets, statements of operations, comprehensive income, cash flows and stockholders' equity for the periods presented. Operating results for the periods presented are not necessarily indicative of the results to be expected for the full year ending December 31, 2013. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") have been omitted in accordance with the rules and regulations of the SEC. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012, as filed with the SEC on February 27, 2013.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The Company's condensed consolidated financial statements were prepared in accordance with U.S. GAAP and include the assets, liabilities, revenue and expenses of all wholly‑owned subsidiaries and majority‑owned subsidiaries over which the Company exercises control and variable interest entities for which the Company has determined that it is the primary beneficiary. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as “Noncontrolling interests" and "Redeemable noncontrolling interests." Equity investments in entities in which the Company does not have a controlling financial interest are accounted for under either the equity method or cost method of accounting, as appropriate.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires estimates and assumptions that affect the reported amounts and classifications of assets and liabilities, revenue and expenses, and the related disclosures of contingent liabilities in the condensed consolidated financial statements and accompanying notes. Estimates are utilized for, but not limited to, stock‑based compensation, income taxes, valuation of acquired goodwill and intangible assets, investments, customer refunds, contingent liabilities and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.