Discontinued Operations and Other Dispositions (Details) - USD ($) $ in Thousands, number in Millions						1 Months Ended		3 Months Ended			6 Months Ended
	Mar. 21, 2017	Mar. 10, 2017	Mar. 03, 2017	May 09, 2016	Apr. 12, 2016	Mar. 09, 2017	Feb. 14, 2017	Jun. 30, 2017		Jun. 30, 2016	Jun. 30, 2017		Jun. 30, 2016	Feb. 16, 2017	Dec. 31, 2016
Disposal Group Income Statement [Abstract]
Third party and other revenue								$ 315,854		$ 294,576	$ 617,426		$ 604,205
Direct revenue								346,765		429,184	718,819		817,990
Third party and other cost of revenue								(38,478)		(38,109)	(81,351)		(79,169)
Direct cost of revenue								(296,074)		(370,274)	(617,376)		(707,547)
Marketing expense								(100,658)		(89,180)	(187,000)		(176,475)
Selling, general and administrative expense								(230,187)		(258,737)	(462,233)		(521,715)
Restructuring Charges								(4,584)		(15,702)	(7,315)		(27,215)
Other income, net								5,878		(11,253)	1,276		(8,635)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax										1,800			300
Gain (Loss) on Disposition of Business								0		9,339	0		9,339
Accounts receivable, net								60,785			60,785				$ 71,272
Prepaid Expense and Other Assets, Current								107,527			107,527				94,441
Property, equipment and software, net								162,577			162,577				169,452
Goodwill								282,011			282,011				274,551
Assets, Noncurrent								17,457			17,457				23,484
Accrued merchant and supplier payable								606,020			606,020				770,992
Accrued Liabilities, Current								328,998			328,998				366,456
Deferred Tax Liabilities, Net, Noncurrent								1,833			1,833				1,714
Other Liabilities, Noncurrent								36,301			36,301				38,298
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash															28,866
Disposal Group Income Statement [Abstract]
Third party and other revenue								0		23,553	12,602		48,492
Direct revenue								0		8,717	2,962		17,314
Third party and other cost of revenue								0		(5,691)	(2,557)		(11,412)
Direct cost of revenue								0		(8,368)	(3,098)		(16,957)
Marketing expense								0		(2,813)	(1,239)		(5,283)
Selling, general and administrative expense								(1,376)	[1]	(18,431)	(11,284)		(36,441)
Restructuring Charges								0		(383)	(778)		(1,314)
Other income, net								0		492	3,852		1,360
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax								(1,376)		(2,924)	460		(4,241)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax								0		0	(1,268)		0
Discontinued Operation, Tax Effect of Discontinued Operation								0	[2]	(39)	(81)	[2]	(779)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent								(1,376)	[2]	(2,963)	(889)	[2]	(5,020)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax								0		$ 0	14,718		0
Accounts receivable, net															15,386
Prepaid Expense and Other Assets, Current															18,994
Property, equipment and software, net															1,554
Goodwill															9,411
Assets, Noncurrent															1,041
Disposal Group, Including Discontinued Operation, Assets								$ 0			0				75,252
Accounts Payable															722
Accrued merchant and supplier payable															29,705
Accrued Liabilities, Current															16,625
Deferred Tax Liabilities, Net, Noncurrent															2,501
Other Liabilities, Noncurrent															426
Disposal Group, Including Discontinued Operation, Liabilities															$ 49,979
Groupon Israel [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business Disposition, Controlling Stake Sold, Percentage	0.00%
Disposal Group Income Statement [Abstract]
Noncash or Part Noncash Acquisition, Investments Acquired											400
Proceeds from Divestiture of Businesses, Net of Cash Divested											2,000
Professional Fees	$ 100
Net Book Value	700
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	$ 200
Gain (Loss) on Disposition of Business											1,800
Noncash or Part Noncash Divestiture, Amount of Consideration Received											2,300
Groupon Singapore [Member]
Disposal Group Income Statement [Abstract]
Noncash or Part Noncash Acquisition, Investments Acquired											1,600
Professional Fees		$ 500
Net Book Value		500
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax		$ 1,100
Gain (Loss) on Disposition of Business											500
Noncash or Part Noncash Divestiture, Amount of Consideration Received											1,100
Groupon Hong Kong [Member]
Disposal Group Income Statement [Abstract]
Proceeds from Divestiture of Businesses, Net of Cash Divested											200
Professional Fees			$ 100
Net Book Value			$ 200
Gain (Loss) on Disposition of Business											300
Noncash or Part Noncash Divestiture, Amount of Consideration Received											100
Groupon Latin America [Member]
Disposal Group Income Statement [Abstract]
Proceeds from Divestiture of Businesses, Net of Cash Divested											3,200
Professional Fees						$ 700
Net Book Value														$ 13,600
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax						15,700
Gain (Loss) on Disposition of Business											2,900
Unfavorable Contract Liability						2,100
Indemnification Liability						$ 5,400
Noncash or Part Noncash Divestiture, Amount of Consideration Received											$ 2,500
Groupon Russia [Member]
Disposal Group Income Statement [Abstract]
Professional Fees					$ 400
Net Book Value					1,600
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax													7,700
Gain (Loss) on Disposition of Business					$ 8,900
Breadcrumb [Member]
Disposal Group Income Statement [Abstract]
Noncash or Part Noncash Acquisition, Investments Acquired													8,300
Professional Fees				$ 100
Net Book Value				7,800
Gain (Loss) on Disposition of Business				$ 400
Noncash or Part Noncash Divestiture, Amount of Consideration Received													$ 8,200
Capital Unit, Class B [Member] | Monster LP [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair-Value Option Investment, Recapitalization Transaction, Shares Exchanged							61,484,539

[1] (2)Selling, general and administrative expense from discontinued operations for the three months ended June 30, 2017 primarily relates to increases to contingent liabilities under indemnification agreements. See Note 7, Commitments and Contingencies, for information about indemnification obligations related to discontinued operations.

[2] The income (loss) from discontinued operations before loss on dispositions and provision for income taxes for the three and six months ended June 30, 2017 includes the results of each business through its respective disposition date.