v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2011
Mar. 30, 2012
Common Class B [Member]
Mar. 30, 2012
Common Class A [Member]
Entity Information [Line Items]      
Entity Registrant Name Groupon, Inc.    
Entity Central Index Key 0001490281    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2011    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock A, Shares Outstanding   2,399,976 642,435,939
Entity Common Stock B, Shares Outstanding   2,399,976 642,435,939
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float $ 5,444,937,032