(LOSS) EARNINGS PER SHARE - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net (loss) earnings	$ (70,494)	$ (4,160)	$ 35,314
Net earnings attributable to noncontrolling interests	(884)	(2,123)	(485)
Net (loss) earnings attributable to Angi Inc. shareholders	$ (71,378)	$ (6,283)	$ 34,829
Weighted average basic Class A and Class B common stock shares outstanding, basic (shares)	502,761	498,159	504,875
Dilutive securities (shares)	0	0	13,044
Denominator for (loss) earnings per share - weighted average shares, diluted (shares)	502,761	498,159	517,919
(Loss) earnings per share attributable to Angi Inc. shareholders:
(Loss) earnings per share, basic (USD per share)	$ (0.14)	$ (0.01)	$ 0.07
(Loss) earnings per share, diluted (USD per share)	$ (0.14)	$ (0.01)	$ 0.07
Stock Options and Subsidiary Denominated Equity and Vesting of Restricted Common Stock, Restricted Stock Units (RSU's)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (shares)	17,500	24,900	5,500
Market-based Awards and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (shares)	2,200	2,000	900