COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	Dec. 07, 2016	Sep. 01, 2016	Jul. 06, 2016	Jun. 30, 2017	Jun. 30, 2016
Loss Contingencies [Line Items]
Unconditional purchase obligations				$ 178.6
GN Netcom, Inc. vs. Plantronics, Inc. [Member]
Loss Contingencies [Line Items]
Punitive sanctions awarded against Plantronics, Inc.			$ 3.0
Accrued amounts					$ 5.0
GN Netcom, Inc. vs. Plantronics, Inc. [Member] | Punitive Sanctions [Member]
Loss Contingencies [Line Items]
Accrued amounts					3.0
Payment of punitive damages	$ 1.9	$ 3.0
GN Netcom, Inc. vs. Plantronics, Inc. [Member] | Estimate of Fees and Costs Incurred [Member]
Loss Contingencies [Line Items]
Accrued amounts					$ 2.0