XML 52 R42.htm IDEA: XBRL DOCUMENT v3.21.2

INVESTMENTS - Summary of Investments (Details)	Sep. 30, 2021	Dec. 31, 2020
Minimum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	19.00%	19.00%
Minimum | Other equity investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	1.00%	1.00%
Minimum | Fair value option investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	10.00%	10.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	25.00%	25.00%
Maximum | Other equity investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	19.00%	19.00%
Maximum | Fair value option investments
Schedule of Equity Method Investments [Line Items]
Equity method investment, percent ownership of voting stock	19.00%	19.00%

X

- Definition

Available For Sale Securities, Redeemable Preferred Shares, Ownership Percentage

+ References

No definition available.

+ Details

Name:	grpn_AvailableForSaleSecuritiesRedeemablePreferredSharesOwnershipPercentage
Namespace Prefix:	grpn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=grpn_OtherEquityInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=grpn_FairValueOptionInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: