DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Company Information Groupon, Inc. and its subsidiaries, which commenced operations in October 2008, is a global scaled two-sided marketplace that connects consumers to merchants by offering goods and services, generally at a discount. Consumers access those marketplaces through our mobile applications and our websites, primarily localized groupon.com sites in many countries. Our operations are organized into two segments: North America and International. See Note 13, Segment Information. Reverse Stock Split In June 2020, we effectuated a reverse stock split of our common stock at a ratio of 1-for-20. See Note 7, Stockholders' Equity and Compensation Arrangements, for additional information. As a result, the number of shares and income (loss) per share disclosed throughout this Quarterly Report on Form 10-Q have been retrospectively adjusted to reflect the reverse stock split. COVID-19 Pandemic Since March 2020, the COVID-19 pandemic has led to a significant decrease in consumer demand, a decrease in customer redemptions and elevated refund levels due to changes in consumer behavior and actions taken by governments to control the spread of COVID-19, including quarantines, travel restrictions, as well as business restrictions and shutdowns. The COVID-19 pandemic has had an adverse impact on our financial condition, results of operations and cash flows, which included impairments of our goodwill and long-lived assets in 2020. Recovery from the COVID-19 pandemic could be volatile and prolonged given the unprecedented and continuously evolving nature of the situation. We continue to monitor the impact of COVID-19 on our business. Unaudited Interim Financial Information We have prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the SEC for interim financial reporting. These condensed consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations and comprehensive income (loss), cash flows and stockholders' equity for the periods presented. These condensed consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2020. Principles of Consolidation The condensed consolidated financial statements include the accounts of Groupon, Inc. and its wholly-owned subsidiaries, majority-owned subsidiaries over which we exercise control and variable interest entities for which we are the primary beneficiary. All intercompany accounts and transactions have been eliminated in consolidation. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as Noncontrolling interests. Investments in entities in which we do not have a controlling financial interest are accounted for at fair value, as available-for-sale securities or at cost adjusted for observable price changes and impairments, as appropriate. Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Estimates in our financial statements include, but are not limited to, the following: variable consideration from unredeemed vouchers; income taxes; leases; initial valuation and subsequent impairment testing of goodwill, other intangible assets and long-lived assets; investments; receivables; customer refunds and other reserves; contingent liabilities; and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates. Reclassifications Certain reclassifications have been made to the condensed consolidated financial statements of prior periods to conform to the current period presentation. Adoption of New Accounting Standards We adopted the guidance in ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, on January 1, 2021. This ASU simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The adoption of ASU 2019-12 did not have a material impact on the condensed consolidated financial statements. We adopted the guidance in ASU 2020-03, Codification Improvements to Financial Instruments, on January 1, 2021. This ASU amends a wide variety of Topics in the Codification, including revolving-debt arrangements and allowance for credit losses related to leases. The adoption of ASU 2020-03 did not have a material impact on the condensed consolidated financial statements. We early adopted the guidance in ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, on January 1, 2021. The ASU removes the separation models for convertible debt with a cash conversion feature or convertible instruments with a beneficial conversion feature. Additionally, the ASU removes certain conditions for equity classification related to contracts in an entity’s own equity (e.g., warrants) and amends certain guidance related to the computation of earnings per share for convertible instruments and contracts in an entity’s own equity. As a result of adopting ASU 2020-06, we recorded a $67.0 million net reduction to additional paid-in capital, a $19.0 million increase to non-current liabilities and a $48.0 million reduction to our opening accumulated deficit as of January 1, 2021. See Note 5, Financing Arrangements, for additional information.

Groupon, Inc. and its subsidiaries, which commenced operations in October 2008, is a global scaled two-sided marketplace that connects consumers to merchants by offering goods and services, generally at a discount. Consumers access those marketplaces through our mobile applications and our websites, primarily localized groupon.com sites in many countries.

In June 2020, we effectuated a reverse stock split of our common stock at a ratio of 1-for-20. See Note 7, Stockholders' Equity and Compensation Arrangements, for additional information. As a result, the number of shares and income (loss) per share disclosed throughout this Quarterly Report on Form 10-Q have been retrospectively adjusted to reflect the reverse stock split.

Since March 2020, the COVID-19 pandemic has led to a significant decrease in consumer demand, a decrease in customer redemptions and elevated refund levels due to changes in consumer behavior and actions taken by governments to control the spread of COVID-19, including quarantines, travel restrictions, as well as business restrictions and shutdowns. The COVID-19 pandemic has had an adverse impact on our financial condition, results of operations and cash flows, which included impairments of our goodwill and long-lived assets in 2020. Recovery from the COVID-19 pandemic could be volatile and prolonged given the unprecedented and continuously evolving nature of the situation. We continue to monitor the impact of COVID-19 on our business.

We have prepared the accompanying condensed consolidated financial statements pursuant to the rules and regulations of the SEC for interim financial reporting. These condensed consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals, necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations and comprehensive income (loss), cash flows and stockholders' equity for the periods presented. These condensed consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2020.

The condensed consolidated financial statements include the accounts of Groupon, Inc. and its wholly-owned subsidiaries, majority-owned subsidiaries over which we exercise control and variable interest entities for which we are the primary beneficiary. All intercompany accounts and transactions have been eliminated in consolidation. Outside stockholders' interests in subsidiaries are shown on the condensed consolidated financial statements as Noncontrolling interests. Investments in entities in which we do not have a controlling financial interest are accounted for at fair value, as available-for-sale securities or at cost adjusted for observable price changes and impairments, as appropriate.

The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Estimates in our financial statements include, but are not limited to, the following: variable consideration from unredeemed vouchers; income taxes; leases; initial valuation and subsequent impairment testing of goodwill, other intangible assets and long-lived assets; investments; receivables; customer refunds and other reserves; contingent liabilities; and the useful lives of property, equipment and software and intangible assets. Actual results could differ materially from those estimates.

Certain reclassifications have been made to the condensed consolidated financial statements of prior periods to conform to the current period presentation.

We adopted the guidance in ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, on January 1, 2021. This ASU simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The adoption of ASU 2019-12 did not have a material impact on the condensed consolidated financial statements.

We adopted the guidance in ASU 2020-03, Codification Improvements to Financial Instruments, on January 1, 2021. This ASU amends a wide variety of Topics in the Codification, including revolving-debt arrangements and allowance for credit losses related to leases. The adoption of ASU 2020-03 did not have a material impact on the condensed consolidated financial statements.