INCOME TAXES (Details) - USD ($)		12 Months Ended
		Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Current:
Federal		$ 15,794,000	$ (1,199,000)	$ 82,523,000
State		2,310,000	2,550,000	4,274,000
Foreign		9,526,000	(1,550,000)	6,860,000
Total current provision for income taxes		27,630,000	(199,000)	93,657,000
Deferred:
Federal		(15,606,000)	(37,577,000)	9,002,000
State		1,939,000	(4,160,000)	(1,585,000)
Foreign		(83,364,000)	(8,195,000)	22,000
Total deferred benefit for income taxes		(97,031,000)	(49,932,000)	7,439,000
Income tax expense (benefit)		(69,401,000)	(50,131,000)	101,096,000
Components of income before income taxes
United States		(756,095,000)	(179,387,000)	17,654,000
Foreign		(140,488,000)	(6,305,000)	82,573,000
Income (loss) before income taxes		(896,583,000)	(185,692,000)	100,227,000
Reconciliation between statutory federal income taxes and income tax expense
Tax expense at statutory rate		(188,282,000)	(38,995,000)	31,631,000
Foreign operations taxed at different rates		2,497,000	(4,965,000)	(17,970,000)
State taxes, net of federal benefit		(14,326,000)	(1,610,000)	2,689,000
Research and development credit		(6,498,000)	(4,288,000)	(2,023,000)
US tax on foreign earnings		10,889,000	4,398,000	0
Impact of Tax Act		0	(3,728,000)	87,790,000
Goodwill impairment		101,604,000	0	0
Stock based compensation		7,369,000	(1,196,000)	(1,771,000)
Internal restructuring related benefit		(65,069,000)	0	0
Withholding tax		2,657,000	0	0
Deferred tax valuation allowance		68,486,000	0	0
Altera accrual		9,467,000	0	0
Other, net		1,805,000	253,000	750,000
Income tax expense (benefit)		(69,401,000)	(50,131,000)	101,096,000
Components of Deferred Tax Assets
Accruals and other reserves					$ 29,788,000	$ 24,167,000
Deferred compensation					277,000	2,980,000
Net operating loss carry forward					11,810,000	16,921,000
Stock compensation					10,867,000	9,484,000
Interest expense					10,676,000	11,550,000
Tax credits					12,437,000	7,072,000
Engineering costs					41,123,000	31,015,000
Intangible assets					94,809,000	0
Other deferred tax assets					3,826,000	635,000
Deferred Tax Assets, Valuation Allowance					81,436,000	15,787,000
Total deferred tax assets					134,177,000	88,037,000
Components of Deferred Tax Liabilities
Deferred gains on sales of properties					(1,128,000)	(1,155,000)
Deferred Tax Liabilities, Intangible Assets					(55,586,000)	(92,544,000)
Deferred Tax Liabilities, Unearned Revenue					6,521,000	(5,054,000)
Unremitted earnings of certain subsidiaries					(7,123,000)	(17,879,000)
Fixed asset depreciation					818,000
Fixed asset depreciation						(7,881,000)
Right of use assets					(5,316,000)	0
Total deferred tax liabilities					61,814,000	124,513,000
Net deferred tax assets	[1]				$ 72,363,000
Deferred Tax Liabilities, Net	[1]					36,476,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period		26,458,000	12,612,000	12,854,000
Increase (decrease) of unrecognized tax benefits related to prior fiscal years		11,226,000	254,000	(1,310,000)
Unrecognized Tax Benefits, Increase Resulting from Acquisition		89,000	13,329,000	0
Increase of unrecognized tax benefits related to the current year		115,824,000	2,069,000	3,085,000
Reductions to unrecognized tax benefits related to settlements with taxing authorities		(995,000)	0	(115,000)
Reductions to unrecognized tax benefits related to lapse of applicable statute of limitations		(295,000)	(1,806,000)	(1,902,000)
Balance at end of period		152,307,000	26,458,000	12,612,000
Deferred Tax Assets, Valuation Allowance, Percent					100.00%
Valuation allowance					$ 71,600,000
Deferred Tax Liabilities, Intangible Assets					(55,586,000)	(92,544,000)
Intangible assets					94,809,000	0
Tax penalties accrued						0	$ 0
Unrecognized tax benefits		26,458,000	$ 26,458,000	$ 12,854,000	152,307,000	26,458,000	$ 12,612,000
Interest related to unrecognized tax benefits					4,000,000.0	2,000,000.0
Unrecognized Tax Benefits, Period Increase (Decrease)		$ 7,300,000
Net operating loss carry forward					11,810,000	16,921,000
Tax credits					12,437,000	$ 7,072,000
Polycom
Components of Deferred Tax Assets
Intangible assets					76,500,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Intangible assets					$ 76,500,000

[1] The Company's deferred tax assets for the Fiscal Year ended March 28, 2020 and March 30, 2019, are included as a component of other assets on the consolidated balance sheets.