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COMMITMENTS AND CONTINGENCIES - Narrative (Details)
Sep. 03, 2020
arbitration
Jul. 13, 2020
plaintiff
Jun. 13, 2019
plaintiff
Aug. 31, 2018
plaintiff
Aug. 14, 2018
USD ($)
plaintiff
Dec. 31, 2020
USD ($)
lawsuit
Other Commitments [Line Items]            
Loss contingency reserve           $ 0
Number of lawsuits with possible material impact (one or more) | lawsuit           1
Purchase Obligation            
Other Commitments [Line Items]            
Purchase obligations due in next twelve months           $ 54,000,000.0
Purchase obligations due between one and three years           9,000,000.0
Purchase obligations due between three and five years           12,000,000.0
Total purchase obligations           75,000,000.0
Surety Bond            
Other Commitments [Line Items]            
Funding commitments           $ 200,000
Tinder Optionholder Litigation            
Other Commitments [Line Items]            
Number of plaintiffs | plaintiff     2 6 10  
Number of plaintiffs who filed a discontinuance of claims | plaintiff   4   4    
Number of arbitrations | arbitration 4          
Tinder Optionholder Litigation | Pending Litigation            
Other Commitments [Line Items]            
Damages sought         $ 2,000,000,000