SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	$ 17,644	$ 11,403	$ 1,348	$ 7,762
Stock-based compensation expense	14,759	17,520	40,334	36,802
Depreciation	12,555	8,796	24,693	15,795
Amortization of intangibles	12,978	13,713	25,958	28,252
Interest expense—third party	(1,620)	(2,963)	(3,894)	(5,957)
Other income, net	212	1,047	633	3,318
Earnings (loss) before income taxes	16,236	9,487	(1,913)	5,123
Income tax provision	(3,025)	(2,253)	5,940	11,962
Net earnings	13,211	7,234	4,027	17,085
Net earnings (loss) attributable to noncontrolling interests	(544)	(266)	(318)	(148)
Net earnings attributable to ANGI Homeservices Inc. shareholders	12,667	6,968	3,709	16,937
North America
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	16,190	12,473	8,082	13,215
Stock-based compensation expense	14,495	17,387	39,807	36,459
Depreciation	11,467	8,227	22,764	14,434
Amortization of intangibles	12,889	13,519	25,779	27,187
Adjusted EBITDA	55,041	51,606	96,432	91,295
Europe
Segment Reporting, Other Significant Reconciling Item
Operating income (loss)	1,454	(1,070)	(6,734)	(5,453)
Stock-based compensation expense	264	133	527	343
Depreciation	1,088	569	1,929	1,361
Amortization of intangibles	89	194	179	1,065
Adjusted EBITDA	$ 2,895	$ (174)	$ (4,099)	$ (2,684)