Stockholders' Equity Note [Abstract] Stockholders' Equity and Stock-Based Compensation Note [Text Block] Stockholders' Equity Note Disclosure [Text Block] SEGMENT INFORMATION [Abstract] SEGMENT INFORMATION [Abstract] Segment Reporting Disclosure [Text Block] GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract] GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Finite-Lived Intangible Assets [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Amortization of Intangible Assets Amortization of Intangible Assets Finite-Lived Intangible Assets, Net, Amortization Expense [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2014 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Finite-Lived Intangible Assets, Amortization Expense, Total Finite-Lived Intangible Assets, Amortization Expense, Total Finite-Lived Intangible Assets, Amortization Expense, Total - The sum of the amortization expense for the remainder of 2012 through the year 2016 and beyond for what is actually calculable. INCOME TAXES [Abstract] INCOME TAXES [Abstract] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity, Acquisition [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity, Acquisition [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity, Acquisition [Table Text Block] FAIR VALUE MEASUREMENTS [Abstract] FAIR VALUE MEASUREMENTS [Abstract] Fair Value, Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Debt Securities [Member] Debt Securities [Member] Redeemable Preferred Stock [Member] Redeemable Preferred Stock [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value [Member] Estimate of Fair Value Measurement [Member] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Available-for-Sale Securities Available-for-sale Securities Contingent Consideration, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Investments, All Other Investments [Abstract] Cost and Equity Method Investments Disclosure [Text Block] Cost and Equity Method Investments Disclosure [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs [Table Text Block] Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs [Table Text Block] Fair Value, Assets and Liabilities, Reconciliation of Level 3 Inputs [Table Text Block] Fair Value of Financial Assets and Liabilities not Measured at Fair Value [Table Text Block] Fair Value of Financial Assets and Liabilities not Measured at Fair Value [Table Text Block] Fair Value of Financial Assets and Liabilities not Measured at Fair Value Income Tax Disclosure [Abstract] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Amortization Period [Axis] Amortization Period [Axis] Amortization Period [Axis] Amortization Period [Domain] Amortization Period [Domain] [Domain] for Amortization Period [Axis] Future amortization through 2014 [Member] Future amortization through 2014 [Member] Future amortization through 2014 [Member] Future amortization through 2015 [Member] Future amortization through 2015 [Member] Future amortization through 2015 [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid Expenses and Other Current Assets [Member] Prepaid Expenses and Other Current Assets [Member] Other Assets [Member] Other Assets [Member] Statement [Line Items] Statement [Line Items] Provision for income taxes Income Tax Expense (Benefit) Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Effective Tax Rate, Percent Effective Income Tax Rate Reconciliation, Percent Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Potential Change in Unrecognized Tax Benefits Potential Change in Unrecognized Tax Benefits Potential Change in Unrecognized Tax Benefits Prepaid Taxes Prepaid Taxes Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock Options [Member] Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Options [Abstract] Options [Abstract] Options [Abstract] Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Exercise of stock options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options, Forfeited Shares Stock Issued During Period, Shares, Share-based Compensation, Forfeited Options, Outstanding, Number Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price [Abstract] Weighted-Average Exercise Price [Abstract] Weighted-Average Exercise Price [Abstract] Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options, Forfeitures in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Options, Outstanding, Weighted Average Exercise Price Options, Weighted Average Exercise Price Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Weighted Average Remaining Contractual Term [Abstract] Weighted Average Remaining Contractual Term [Abstract] Weighted Average Remaining Contractual Term [Abstract] Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options, Outstanding, Weighted Average Remaining Contractual Term Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value [Abstract] Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options, Outstanding, Intrinsic Value Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value LOSS PER SHARE OF CLASS A AND CLASS B COMMON STOCK [Abstract] [Abstract] LOSS PER SHARE OF CLASS A AND CLASS B COMMON STOCK [Abstract] [Abstract] Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and Diluted [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Earnings Per Share, Basic [Abstract] Earnings Per Share, Basic [Abstract] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net (loss) income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Basic, weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Basic Basic, net (loss) earnings per share Earnings Per Share, Basic Earnings Per Share, Diluted [Abstract] Earnings Per Share, Diluted [Abstract] Net Income (Loss) Available to Common Stockholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted Reallocation of net income attributable to common stockholders as a result of conversion of Class B Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Allocation of net income attributable to common stockholders Undistributed Earnings, Diluted Conversion of Class B Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock Employee stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Restricted shares and RSUs Diluted Restricted Stock Adjustment Diluted Restricted Stock Adjustment - Adjusted to weighted average shares outstanding for unveested restricted stock in the computation of diluted EPS. Diluted, weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted, net (loss) earnings per share Earnings Per Share, Diluted Loss Per Share of Class A and Class B Common Stock [Text Block] Earnings Per Share [Text Block] Consolidated Statements of Stockholders' (Deficit) Equity [Abstract] Consolidated Statements of Stockholders' (Deficit) Equity [Abstract] Condensed Consolidated Statement of Stockholders' Equity Condensed Consolidated Statement of Stockholders Equity [Table] Condensed Consolidated Statement of Stockholders Equity [Table] Treasury Stock [Member] Treasury Stock [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Common Stock [Member] Common Stock [Member] Parent [Member] Parent [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Total Equity [Member] Stockholders' Equity, Total [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance, Shares, Outstanding Shares, Outstanding Beginning Balance, Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Unrealized loss on available-for-sale debt security, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Common stock issued in connection with acquisition of business, shares Stock Issued During Period, Shares, Acquisitions Stock Issued During Period, Value, Acquisitions, Net of Issuance Costs Stock Issued During Period, Value, Acquisitions, Net of Issuance Costs Stock Issued During Period, Value, Acquisitions, Net of Issuance Costs Shares issued to settle liability-classified awards, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Shares issued to settle liability-classified awards and contingent consideration Shares issued to settle liability-classified awards Shares issued to settle liability-classified awards Exercise of stock options, shares Exercise of stock options, value Stock Issued During Period, Value, Stock Options Exercised Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vesting of restricted stock units, value Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Shares issued under employee stock purchase plan, shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Shares issued under employee stock purchase plan, value Stock Issued During Period, Value, Employee Stock Purchase Plan Tax withholding related to net share settlements of stock-based compensation awards, shares Shares Paid for Tax Withholding for Share Based Compensation Tax withholding related to net share settlements of stock-based compensation awards, value Adjustments Related to Tax Withholding for Share-based Compensation Stock-based compensation on equity-classified awards Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Excess tax benefits, net of shortfalls, on stock-based compensation awards Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Purchases of treasury stock, shares Treasury Stock, Shares, Acquired Purchases of treasury stock, value Treasury Stock, Value, Acquired, Cost Method Partnership distributions to noncontrolling interest holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Ending Balance, Shares, Outstanding Ending Balance, Equity Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Schedule of Cost and Equity Method Investments [Table Text Block] Schedule of Cost and Equity Method Investments [Table Text Block] [Table Text Block] for Schedule of Cost and Equity Method Investments [Table] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] SUPPLEMENTAL CONSOLIDATED BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION [Abstract] SUPPLEMENTAL CONSOLIDATED BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION [Abstract] [Abstract] Interest and Other Income [Abstract] Interest and Other Income [Abstract] Interest income Interest Income, Other Interest Expense Interest Expense Impairment of investment Cost-method Investments, Other than Temporary Impairment Loss on equity method investments Income (Loss) from Equity Method Investments Foreign exchange and other Foreign exchange and other income Foreign exchange and other income expense Other expense, net Other Nonoperating Income (Expense) Prepaid Expense and Other Assets, Current [Abstract] Prepaid Expense and Other Assets, Current [Abstract] Current portion of unamortized tax effects on intercompany transactions Current portion of unamortized tax effects on intercompany transactions Current portion of unamortized tax effects on intercompany transactions Finished goods inventories Inventory, Finished Goods, Net of Reserves Prepaid expenses Prepaid Expense, Current Restricted cash Restricted Cash and Cash Equivalents, Current VAT and income taxes receivable Value Added Tax Receivable, Current Prepaid marketing Prepaid Marketing Prepaid Marketing Other Other Assets, Current Total prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Merchant and Supplier Payables [Abstract] Merchant and Supplier Payables [Abstract] Merchant and Supplier Payables [Abstract] Accrued merchant payables Merchant payables Merchant payables Accrued supplier payables Payables to suppliers of inventories Payables to suppliers of inventories Total accrued merchant and supplier payables Accrued merchant payable Accrued merchant payable - payables due to merchants for groupons sold Accrued Expenses [Abstract] ACCRUED EXPENSES [Abstract] ACCRUED EXPENSES [Abstract] Marketing Accrued Marketing Costs, Current Refunds reserve Customer Refund Liability, Current Payroll and benefits Employee-related Liabilities, Current Customer credits Subscriber rewards and credits Subscriber Rewards and Credits - Liability for points and rewards granted to customers that frequently purchase Groupons. Additionally liability is for rewards issued to customers who participate in online games to earn points. Professional fees Accrued Professional Fees, Current Other Other Accrued Liabilities, Current Total accrued expenses Accrued Liabilities, Current Current liabilities [Abstract]: Other Current Liabilities [Abstract] Other Current Liabilities [Abstract] Income taxes payable Accrued Income Taxes, Current VAT payable Value Added Tax Payable Value Added Tax Payable Sales taxes payable Sales and Excise Tax Payable, Current Deferred revenue Deferred Revenue, Current Other Other Liabilities Total other current liabilities Other Liabilities, Current Liabilities, Noncurrent [Abstract] Other Non-Current Liabilities [Abstract] Other Non-Current Liabilities [Abstract] Long-term tax liabilities Accrued Income Taxes, Noncurrent Deferred rent Deferred Rent Credit, Noncurrent Other Liabilities, Noncurrent Total other non-current liabilities Other Liabilities, Noncurrent Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Unrealized loss on available-for-sale securities, net of tax Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Assets, Total [Member] Assets, Total [Member] Business Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] North America [Member] North America [Member] EMEA [Member] EMEA [Member] ROW [Member] ROW [Member] ROW [Member] United States [Member] United States [Member] United States [Member] Korea [Member] Korea [Member] Korea [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total Assets Assets Concentration of risk, percentage Concentration Risk, Percentage Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units [Abstract] Restricted Stock Units [Abstract] Restricted Stock Units [Abstract] Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Equity Instruments Other than Options, Vested in Period Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Equity Instruments Other than Options, Nonvested, Number Weighted Average Grant Date Fair Value [Abstract] Weighted Average Grant Date Fair Value [Abstract] Weighted Average Grant Date Fair Value [Abstract] Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Ticket Monster [Member] Ticket Monster [Member] Ticket Monster [Member] Ideeli [Member] Ideeli [Member] Ideeli [Member] Other Acquisitions [Member] Other Acquisitions [Member] Other Acquisitions [Member] Subscriber Relationships [Member] Customer Relationships [Member] Merchant Relationships [Member] Merchant relationships [Member] Merchant relationships [Member] - Intangible asset realized in purchase accounting for pre-existing relationships with merchant partners that resulted from a business combination. Brand Relationships [Member] Brand Relationships [Member] Brand Relationships [Member] Technology-Based Intangible Assets [Member] Technology-Based Intangible Assets [Member] Trade names [Member] Trade Names [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Number of Businesses Acquired Number of Businesses Acquired Business Combination, Transaction Costs Business Combination, Transaction Costs Business Combination, Transaction Costs Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Business Combinations, cash transferred Payments to Acquire Businesses, Gross Business Combination, Contingent Consideration Business Combination, Consideration Transferred, Other Business Combination, Consideration Transferred, Liabilities Incurred Business Combination, Consideration Transferred, Liabilities Incurred Business Combination, issuance of Class A common stock Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Receivable from seller for working capital adjustments in connection with acquisitions Receivable from seller for working capital adjustments in connection with acquisitions Receivable from seller for working capital adjustments in connection with acquisitions Business Combination, Consideration Transferred Business Combination, Consideration Transferred Purchase Price Allocation [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Cash and Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Combination, Current Assets, Receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Business Combination, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Current Assets, Prepaid Expense and Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Business Combination, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Goodwill Goodwill Business Combination, Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Deferred Tax Assets Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Business Combination, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Accrued Merchant and Supplier Payables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Merchant and Supplier Payables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Merchant and Supplier Payables Business Combinations, Accrued Expenses Business Combinations, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Business Combinations, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Expenses Business Combination, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Deferred Tax Liabilities Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Business Combination, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Balance Sheet Paranthetical [Abstract] Balance Sheet Paranthetical [Abstract] Condensed Consolidated Balance Sheet Parenthetical [Table] Condensed Consolidated Balance Sheet Parenthetical [Table] Condensed Consolidated Balance Sheet Parenthetical [Table] Condensed Consolidated Balance Sheet Parenthetical [Line Items] Condensed Consolidated Balance Sheet Parenthetical [Line Items] [Line Items] for Condensed Consolidated Balance Sheet Parenthetical [Table] Common Stock, Par Value Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Treasury Stock, Shares Treasury Stock, Shares Revenue by Segment and Category [Abstract] Revenue by Segment and Category [Abstract] Statement [Table] Statement [Table] Category [Axis] Category [Axis] Category [Axis] Category [Domain] Category [Domain] [Domain] for Category [Axis] Local [Member] Local [Member] Local [Member] Goods [Member] Goods [Member] Goods [Member] Travel [Member] Travel and other [Member] Travel and other [Member] Primary Categories Primary Categories Primary Categories Third party and other Revenue, third party and other Third party revenue arises from transactions in which we are acting as a third party marketing agent and consists of the net amount we retain from the sale of Groupons after paying an agreed upon portion of the purchase price to the featured merchant, excluding any applicable taxes and net of estimated refunds for which the merchant's share is recoverable. Other revenue primarily consists of advertising revenue. Direct Sales Revenue, Goods, Net Total revenue Revenues Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Convertible Debt Securities [Member] Convertible Debt Securities [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] AFS Securities, Beginning Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value AFS Debt Security, (losses) included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Purchase of redeemable preferred shares Purchase of redeemable preferred shares Purchase of redeemable preferred shares AFS Securities, Ending Asset Value Unrealized (Gains) Losses Still Held - Assets Unrealized (Gains) Losses Still Held - Assets Unrealized (Gains) Losses Still Held - Assets Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Restricted Stock [Member] Restricted Stock [Member] Employee Stock [Member] Employee Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Performance share units Performance share units Performance share units Developed Technology Rights [Member] Developed Technology Rights [Member] Other Intangible Assets [Member] Other Intangible Assets [Member] Gross Carrying Value, Intangible Assets Finite-Lived Intangible Assets, Gross Accumulated Amortization, Intangible Assets Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Value, Intangible Assets Finite-Lived Intangible Assets, Net Consolidated Balance Sheets [Abstract] Consolidated Balance Sheets [Abstract] Condensed Consolidated Balance Sheet [Table] Condensed Consolidated Balance Sheet [Table] Condensed Consolidated Balance Sheet [Table] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net Accounts Receivable, Net, Current Deferred income taxes Deferred Tax Assets, Net, Current Prepaid expense and other current assets Total current assets Assets, Current Property, equipment and software, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Investments Investments Deferred income taxes, non-current Deferred Tax Assets, Net, Noncurrent Other non-current assets Other Assets, Noncurrent Total Assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued merchant and supplier payables Accrued expenses Deferred income taxes Deferred Tax Liabilities, Net, Current Other current liabilities Total current liabilities Liabilities, Current Deferred income taxes, non-current Deferred Tax Liabilities, Net, Noncurrent Other non-current liabilities Total Liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Common Stock, Value, Issued Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury Stock, Value Treasury Stock, Value Accumulated Deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Total Groupon, Inc. Stockholders' Equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total Equity Total Liabilities and Equity Liabilities and Equity Schedule of Earnings per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Investment Type [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Gross Unrealized Gain (Loss) Available-for-sale Securities, Gross Unrealized Gain (Loss) Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Common Stock Outstanding [Abstract] Common Stock Outstanding [Abstract] Entities [Table] Entities [Table] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Common Stock, Shares, Outstanding Entity Common Stock, Shares Outstanding Schedule of Other Income (Expense) [Table Text Block] Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Prepaid Expenses and Other Current Assets [Table Text Block] Schedule of Other Current Assets [Table Text Block] Schedule of Accrued Merchant and Supplier Payables [Table Text Block] Schedule of Accrued Merchant and Supplier Payables [Table Text Block] [Table Text Block] for Schedule of Accrued Merchant and Supplier Payables [Table] Schedule of Accrued Expenses [Table Text Block] Schedule of Accrued Liabilities [Table Text Block] Schedule of Other Current Liabilities [Table Text Block] Other Current Liabilities [Table Text Block] Schedule of Other Liabilities, Noncurrent [Table Text Block] Other Noncurrent Liabilities [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract] DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract] Description of Business and Basis of Presentation [Text Block] Business Description and Basis of Presentation [Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Stock Based Compensation and Acquisition Related by Segment [Table Text Block] Stock Based Compensation and Acquisition Related by Segment [Table Text Block] Stock Based Compensation and Acquisition Related by Segment [Table Text Block] Schedule of Segment Assets [Table Text Block] Reconciliation of Assets from Segment to Consolidated [Table Text Block] Revenue by Segment and Category [Table Text Block] Third Party and Other and Direct Revenue [Table Text Block] Revenue broken out by the categories of Third party and other revenue, Goods and Travel and other. Gross Profit by Segment and Category [Table Text Block] Gross Profit by Category [Table Text Block] Gross Profit by Category Fair Value Measurements [Text Block] Fair Value Disclosures [Text Block] Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization of property, equipment and software Depreciation, Depletion and Amortization Amortization of acquired intangible assets Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Excess tax benefits on stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Loss on equity method investments (Gain) loss, net from changes in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Impairment of cost method investments Change in assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Restricted cash Increase (Decrease) in Restricted Cash for Operating Activities Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued merchant and supplier payables Increase (Decrease) in Accrued Merchant Payables Increase (Decrease) in Accrued Merchant Payables Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment and capitalized software Payments to Acquire Property, Plant, and Equipment Acquisitions of businesses, net of acquired cash Payments to Acquire Businesses, Net of Cash Acquired Purchases of investments Payments to Acquire Investments Settlement of liabilities related to purchase of additional interest in consolidated subsidiary Settlement of Liability Related to Purchase of Additional Interest in Consolidated Subsidiary Settlement of Liability Related to Purchase of Additional Interest in Consolidated Subsidiary Purchases of intangible assets Payments to Acquire Intangible Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Payments for purchases of treasury stock Payments for Repurchase of Common Stock Excess tax benefits on stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Taxes paid related to net share settlements of stock-based compensation awards Payments Related to Tax Withholding for Share-based Compensation Common stock issuance costs in connection with acquisition of business Payments of Stock Issuance Costs Payments of contingent consideration from acquisitions Payments of contingent consideration from acquisitions Payments of contingent consideration from acquisitions Settlements of purchase price obligations related to acquisitions Other Payments to Acquire Businesses Proceeds from stock option exercises and employee stock purchase plan Proceeds from Stock Options Exercised Partnership distribution payments to noncontrolling interest holders Payments to Noncontrolling Interests Payments of capital lease obligations Repayments of Long-term Capital Lease Obligations Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Issuance of common stock in connection with acquisition of business Stock Issued During Period, Value, Acquisitions Contingent consideration liabilities incurred in connection with acquisitions Contingent consideration in connection with acquisitions Contingent consideration in connection with acquisitions - noncash investing activity Receivable from seller for working capital adjustments in connection with acquisitions Equipment acquired under capital lease obligations Capital Lease Obligations Incurred Liability for purchases of treasury stock liability for purchases of treasury stock Liability for purchases of treasury stock Liability for purchase consideration Liability for purchase consideration Liability for purchase consideration Accounts payable and accrued expenses related to purchases of property and equipment and capitalized software Capital Expenditures Incurred but Not yet Paid Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Standby Letters of Credit [Member] Standby Letters of Credit [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Line of Credit [Member] Line of Credit [Member] Letter of Credit [Member] Letter of Credit [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Interest Rate Description Line of Credit Facility, Interest Rate Description Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Unrestricted Cash Covenant Terms Unrestricted cash covenant Unrestricted cash covenant on the line of credit agreement Line of Credit Facility, Cash Institution Covenant Cash institution covenant Cash institution covenant related to the unrestricted cash credit agreement covenant. Subsequent Events [Text Block] Subsequent Events [Text Block] Additional Financial Information Disclosures [Text Block] Additional Financial Information Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High Contingent Consideration, Beginning Value Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Contingent Consideration, Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Contingent Consideration, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Contingent Consideration, Reclass Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Contingent Consideration, Ending Value Contingent Consideration, Unrealized Gain Loss Fair Value, Measurement with Unobservable Inputs, Unrealized Gain Loss Fair Value, Measurement with Unobservable Inputs, Unrealized Gain Loss Business Combinations and Acquisitions of Noncontrolling Interests Disclosure [Text Block] Business Combination Disclosure [Text Block] Gross Profit by Segment and Category [Abstract] Gross Profit by Segment and Category [Abstract] Gross Profit by Segment and Category [Table] Gross Profit by Category [Table] Gross Profit by Category [Table] Third party and other [Member] Third party and other [Member] Third party and other gross profit [Member] Direct [Member] Direct [Member] Direct [Member] Gross Profit by Category [Line Items] Gross Profit by Category [Line Items] [Line Items] for Gross Profit by Category [Table] Gross Profit Gross Profit Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Business Acquisitions, Consideration Transferred Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Business Acquisitions, Purchase Price Allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due COMMITMENTS AND CONTINGENCIES [Abstract] COMMITMENTS AND CONTINGENCIES [Abstract] Restatement of Prior Year Revenue Restatement of Prior Year Revenue Restatement of Prior Year Revenue - Resulting effect of revision to prior year financial statements Restatement of Prior Year Operating Income Restatement of Prior Year Operating Income Restatement of Prior Year Operating Income - Resulting effect of revision to prior year financial statements Restatement of Prior Year Income, Net of Tax Restatement of Prior Year Income, Net of Tax Impact of Restatement on Earnings Per Share, Basic Impact of Restatement on Earnings Per Share, Basic Litigation Settlement, Expense Litigation Settlement, Expense Schedule of Cost and Equity Method Investments [Table] Schedule of Cost and Equity Method Investments [Table] Schedule of Cost and Equity Method Investments [Table] Cost-method Investments [Member] Cost-method Investments [Member] Schedule of Cost and Equity Method Investments [Line Items] Schedule of Cost and Equity Method Investments [Line Items] [Line Items] for Schedule of Cost and Equity Method Investments [Table] Cost Method Investments Cost Method Investments Cost Method Investments, Ownership Percentage Cost Method Ownership Percentage Cost Method Ownership Percentage - The Company's aggregate percent ownership of cost method investment. Equity Method Investments Equity Method Investments Equity Method Investments, Ownership Percentage Equity Method Investment, Ownership Percentage Investments, cost and equity method Investments, cost and equity method Investments, cost and equity method Available-for-Sale Securities, Ownership Percentage AFS Debt Security, Ownership Percentage AFS Debt Security, Ownership Percentage Investments Payments to Acquire Available-for-sale Securities Payments to Acquire Available-for-sale Securities Schedule of Goodwill [Table Text Block] Schedule of Goodwill [Table Text Block] Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Business Acquisitions, Pro Forma Information [Abstract] Business Acquisitions, Pro Forma Information [Abstract] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Net Income (Loss) Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual City Deal [Member] City Deal [Member] Relating to the acquisition of City Deal in 2010. Restricted Stock [Abstract] Restricted Stock [Abstract] Restricted Stock [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning of period Goodwill, related to acquisitions Goodwill, Acquired During Period Goodwill, other adjustments Goodwill, Translation and Purchase Accounting Adjustments Goodwill, end of period Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Performance Shares [Member] Performance Shares [Member] Performance Share Units, Shares Granted Performance Share Units, Shares Granted Performance Share Units, Shares Granted Accounting Policies [Abstract] Consolidation, Policy [Policy Text Block] Consolidation, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Classes of common stock, number Classes of common stock, number The number of classes of common stock Switzerland [Member] Switzerland [Member] Switzerland [Member] Number of Reportable Segments Number of Reportable Segments Segment Cost of Revenue and Operating Expenses Segment Cost of Revenue and Operating Expenses Segment cost of Revenue and Operating Expenses Segment operating income (loss) Segment operating (loss) income Segment operating (loss) income Acquisition-related expense (benefit), net Business Combination, Acquisition Related Costs (Loss) Income from operations Operating Income (Loss) Other expense, net Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements of Comprehensive Income Condensed Consolidated Statement of Comprehensive Income [Table] [Table] Condensed Consolidated Statement of Comprehensive Income [Table] Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized (loss) gain on available-for-sale debt securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interests Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest Comprehensive (loss) income attributable to Groupon Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Statement [Abstract] Revenue: Revenues [Abstract] Total revenue Cost of revenue: Cost of Revenue [Abstract] Third party and other Cost of revenue, third party and other Cost of revenue, where the Company acts as the third party agent Direct Cost of Goods Sold Total cost of revenue Cost of Revenue Gross Profit Operating expenses: Operating Expenses [Abstract] Marketing Marketing Expense Selling, general and administrative Selling, General and Administrative Expense Total operating expenses Operating Expenses (Loss) Income before provision for income taxes Net loss Net income attributable to noncontrolling interests Net loss attributable to Groupon, Inc. Net Income (Loss) Attributable to Parent Net loss per share Earnings Per Share [Abstract] Weighted average number of shares outstanding Weighted average number of shares outstanding, basic and diluted [Abstract] Weighted average number of shares outstanding, basic and diluted [Abstract] Diluted, weighted average number of shares outstanding Employee Stock Purchase Plan [Line Items] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Stock Repurchased During Period, Value Stock Repurchased During Period, Value Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount STOCKHOLDERS' EQUITY AND STOCK BASED COMPENSATION [Abstract] STOCKHOLDERS' EQUITY AND STOCK BASED COMPENSATION [Abstract] Share-based Compensation, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Employee Stock Purchase Plan, shares authorized Employee Stock Purchase Plan, shares authorized Employee Stock Purchase Plan, shares authorized Employee Stock Purchase Plan, issued shares Employee Stock Purchase Plan, issued shares Employee Stock Purchase Plan, issued shares Cost Method Investments, Fair Value Disclosure Cost Method Investments, Fair Value Disclosure