ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS - Acquired Intangible Assets (Details) - Polycom [Member] - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jul. 02, 2018	Sep. 30, 2018	Sep. 30, 2018
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 985,400
Amortization of Intangible Assets		$ 70,945	$ 70,945
Finite-Lived Intangible Assets, Net		914,455	914,455
Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 538,600
Amortization of Intangible Assets		27,568
Finite-Lived Intangible Assets, Net		511,032	511,032
Finite-Lived Intangible Assets, Remaining Amortization Period	4 years 8 months 16 days
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 245,100
Amortization of Intangible Assets		12,066
Finite-Lived Intangible Assets, Net		233,034	233,034
Finite-Lived Intangible Assets, Remaining Amortization Period	5 years 2 months 19 days
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 28,100
Amortization of Intangible Assets		28,100
Finite-Lived Intangible Assets, Net		0	0
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 115,600
Amortization of Intangible Assets		3,211
Finite-Lived Intangible Assets, Net		112,389	112,389
Finite-Lived Intangible Assets, Remaining Amortization Period	8 years 9 months
In Process Research and Development [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired	$ 58,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 58,000	$ 58,000