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CONTINGENCIES - Narrative (Details)
1 Months Ended
Jun. 13, 2019
plaintiff
Aug. 31, 2018
plaintiff
Aug. 14, 2018
USD ($)
plaintiff
Nov. 30, 2018
USD ($)
Jun. 30, 2020
USD ($)
lawsuit
Loss Contingencies [Line Items]          
Loss contingency reserve         $ 0
Number of lawsuits with possible material impact (one or more) | lawsuit         1
Tinder Optionholder Litigation          
Loss Contingencies [Line Items]          
Number of plaintiffs | plaintiff 6 6 10    
Number of plaintiffs that were granted motion to dismiss merger-related claim for breach of contract | plaintiff 2        
Tinder Optionholder Litigation | Pending Litigation          
Loss Contingencies [Line Items]          
Damages sought     $ 2,000,000,000    
FTC Investigation of Business Practices | Pending Litigation          
Loss Contingencies [Line Items]          
Damages sought       $ 60,000,000