CONTINGENCIES - Narrative (Details)	Sep. 03, 2020 arbitration	Jul. 13, 2020 plaintiff	Jun. 13, 2019 plaintiff	Aug. 31, 2018 plaintiff	Aug. 14, 2018 USD ($) plaintiff	Mar. 31, 2021 USD ($) 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 | $					$ 2,000,000,000