COVER PAGE - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 13, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-35335
Entity Registrant Name	Groupon, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0903295
Entity Address, Address Line One	600 W Chicago Avenue
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60654
City Area Code	(312)
Local Phone Number	334-1579
Title of 12(b) Security	Common stock, par value $0.0001 per share
Trading Symbol	GRPN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 215,199,008
Entity Common Stock, Shares Outstanding		30,707,303
Documents Incorporated by Reference	The information required by Part III of this Report, to the extent not set forth herein, is incorporated herein by reference from the registrant's definitive proxy statement relating to the Annual Meeting of Stockholders to be held in 2023 or, if not filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates, from an amended report on Form 10-K/A filed in the same time period.
Entity Central Index Key	0001490281
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY