ORGANIZATION - NARRATIVE (Details)	Dec. 31, 2018
Match Group
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)	81.10%
Voting interest (as a percent)	97.60%
ANGI Homeservices
Noncontrolling Interest [Line Items]
Ownership interest (as a percent)	83.90%
Voting interest (as a percent)	98.10%