GOODWILL AND PURCHASED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 28, 2020	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Impairment prior to re-segmentation	$ 323,100	$ 323,088
Cost of revenues		1,144,755	$ 980,396	$ 417,788
Operating Expenses		1,356,290	803,434	$ 315,614
Polycom
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets		183,700	160,200
Product
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets to be Disposed of	179,600
Cost of revenues	174,200	$ 1,049,826	$ 902,625
Operating Expenses	5,400
Product | Voice
Finite-Lived Intangible Assets [Line Items]
Impairment prior to re-segmentation	47,800
Product | Video
Finite-Lived Intangible Assets [Line Items]
Impairment prior to re-segmentation	112,800
Other Intangible Assets [Member] | Product
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets to be Disposed of	175,000
Machinery and equipment | Product
Finite-Lived Intangible Assets [Line Items]
Impairment of Long-Lived Assets to be Disposed of	$ 4,600