CONTINGENCIES - Narrative (Details)	Jun. 09, 2021 USD ($)	Sep. 03, 2020 arbitration	Jul. 13, 2020 plaintiff	Jun. 13, 2019 plaintiff	Aug. 31, 2018 plaintiff	Aug. 14, 2018 USD ($) plaintiff	Jun. 30, 2021 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				6	6	10
Number of plaintiffs with discontinuance of their claims without prejudice					4
Number of plaintiffs that were granted motion to dismiss merger-related claim for breach of contract				2
Number of plaintiffs who filed a discontinuance of claims			4
Number of arbitrations | arbitration		4
Tinder Optionholder Litigation | Pending Litigation
Loss Contingencies [Line Items]
Damages sought (at least) | $	$ 5,600,000,000					$ 2,000,000,000