Cover Document - shares	6 Months Ended
	Jun. 30, 2016	Jul. 25, 2016
Entity Registrant Name	Groupon, Inc.
Entity Central Index Key	0001490281
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Common Class A [Member]
Common Stock, Shares, Outstanding		572,189,761
Common Class B [Member]
Common Stock, Shares, Outstanding		2,399,976