Income (Loss) Per Share of Class A and Class B Common Stock Basic and Diluted Earnings Per Share (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Basic net income (loss) per share
Allocation of net loss - continuing operations		$ (45,596,000)	$ (16,739,000)
Less: Allocation of net income attributable to noncontrolling interests		3,523,000	3,818,000
Net loss from discontinued operations		0	6,284,000
Net loss attributable to Groupon, Inc.		$ (49,119,000)	$ (14,273,000)
Basic, weighted average number of shares outstanding		582,751,678	676,382,937
Continuing operations		$ (0.08)	$ (0.03)
Discontinued operations		0.00	0.01
Basic, net (loss) earnings per share		$ (0.08)	$ (0.02)
Diluted net income (loss) per share
Basic, weighted average number of shares outstanding		582,751,678	676,382,937
Diluted, weighted average number of shares outstanding		582,751,678	676,382,937
Continuing operations		$ (0.08)	$ (0.03)
Discontinued operations		0.00	0.01
Diluted, net (loss) earnings per share		$ (0.08)	$ (0.02)
Common Class A [Member]
Basic net income (loss) per share
Allocation of net loss - continuing operations		$ (45,408,000)	$ (16,681,000)
Less: Allocation of net income attributable to noncontrolling interests		3,508,000	3,804,000
Allocation of net loss attributable to common stockholders - continuing operations		(48,916,000)	(20,485,000)
Net loss from discontinued operations		0	6,261,000
Net loss attributable to Groupon, Inc.		$ (48,916,000)	$ (14,224,000)
Basic, weighted average number of shares outstanding		580,351,702	673,982,961
Continuing operations			$ (0.03)
Discontinued operations			0.01
Basic, net (loss) earnings per share			$ (0.02)
Diluted net income (loss) per share
Allocation of net income attributable to common stockholders		$ (48,916,000)	$ (14,224,000)
Basic, weighted average number of shares outstanding		580,351,702	673,982,961
Conversion of Class B	[1]	0	0
Employee stock options	[1]	0	0
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	[1]	$ 0	$ 0
Diluted, weighted average number of shares outstanding	[1]	580,351,702	673,982,961
Continuing operations			$ (0.03)
Discontinued operations			0.01
Diluted, net (loss) earnings per share			$ (0.02)
Common Class B [Member]
Basic net income (loss) per share
Allocation of net loss - continuing operations		$ (188,000)	$ (58,000)
Less: Allocation of net income attributable to noncontrolling interests		15,000	14,000
Allocation of net loss attributable to common stockholders - continuing operations		(203,000)	(72,000)
Net loss from discontinued operations		0	23,000
Net loss attributable to Groupon, Inc.		$ (203,000)	$ (49,000)
Basic, weighted average number of shares outstanding		2,399,976	2,399,976
Continuing operations		$ (0.08)	$ (0.03)
Discontinued operations		0.00	0.01
Basic, net (loss) earnings per share		$ (0.08)	$ (0.02)
Diluted net income (loss) per share
Allocation of net income attributable to common stockholders		$ (203,000)	$ (49,000)
Basic, weighted average number of shares outstanding		2,399,976	2,399,976
Conversion of Class B	[1]	0	0
Employee stock options	[1]	0	0
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	[1]	$ 0	$ 0
Diluted, weighted average number of shares outstanding	[1]	2,399,976	2,399,976
Continuing operations		$ (0.08)	$ (0.03)
Discontinued operations		0.00	0.01
Diluted, net (loss) earnings per share		$ (0.08)	$ (0.02)
Continuing Operations [Member] | Common Class A [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation		$ (48,916,000)	$ (20,485,000)
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	[1]	0	0
Allocation of net income attributable to common stockholders		(48,916,000)	(20,485,000)
Continuing Operations [Member] | Common Class B [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation		(203,000)	(72,000)
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	[1]	0	0
Allocation of net income attributable to common stockholders		(203,000)	(72,000)
Discontinued Operations [Member] | Common Class A [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation		0	6,261,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	[1]	0	0
Allocation of net income attributable to common stockholders		0	6,261,000
Discontinued Operations [Member] | Common Class B [Member]
Diluted net income (loss) per share
Allocation of net loss attributable to common stockholders for basic computation		0	23,000
Reallocation of net income attributable to common stockholders as a result of conversion of Class B	[1]	0	0
Allocation of net income attributable to common stockholders		$ 0	$ 23,000

[1] Conversion of Class B shares into Class A shares and outstanding equity awards have not been reflected in the diluted income (loss) per share calculation for the three months ended March 31, 2016 and 2015 because the effect on net income (loss) per share from continuing operations would be antidilutive.