(LOSS) EARNINGS PER SHARE - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net earnings	$ (9,184)	$ 9,851
Net loss attributable to noncontrolling interests	226	118
Net earnings attributable to ANGI Homeservices Inc. shareholders	$ (8,958)	$ 9,969
Weighted average basic shares outstanding (shares)	499,454	504,404
Dilutive securities (shares)	0	18,721
Weighted average diluted shares outstanding (shares)	499,454	523,125
Earnings per share attributable to ANGI Homeservices Inc. shareholders:
Basic (loss) earnings per share (USD per share)	$ (0.02)	$ 0.02
Diluted (loss) earnings per share (USD per share)	$ (0.02)	$ 0.02
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (shares)	38,000
Stock appreciation rights, stock options, subsidiary denominated equity, and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (shares)		4,200
PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from calculation of diluted earnings per share (shares)		800

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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