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	Oct. 01, 2021 USD ($)	Sep. 30, 2021 USD ($) 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 | plaintiff				6	6	10
Number of plaintiffs with discontinuance of their claims without prejudice | plaintiff					4
Number of plaintiffs that were granted motion to dismiss merger-related claim for breach of contract | plaintiff				2
Number of plaintiffs who filed a discontinuance of claims | plaintiff			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
Tinder Optionholder Litigation | Pending Litigation | Minimum | Subsequent Event
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss | $							$ 0
Tinder Optionholder Litigation | Pending Litigation | Maximum | Subsequent Event
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss | $							$ 2,500,000,000