Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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Number of shares of equity interests issued or issuable to acquire entity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands, shares in Millions		3 Months Ended		6 Months Ended
	Jul. 02, 2018	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2018	Mar. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 1,334,534	$ 1,334,534	$ 1,334,534	$ 15,498
Triangle [Member]
Business Acquisition [Line Items]
Ownership percentage	16.00%
Polycom [Member]
Business Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			255,038
Amortization of Intangible Assets		$ 70,945		$ 70,945
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				5 years 4 months 17 days
Goodwill	$ 1,319,036
Business Combination, Consideration Transferred	$ 2,200,000
Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Shares	6.4
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 500,000
Business Combination, Acquisition Related Costs	26,300
Payments to Acquire Businesses, Gross	1,700,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ (96,469)
Deferred Revenue Adjustment [Member]
Business Acquisition [Line Items]
Revenues	(36,600)
Fair Value Adjustment to Inventory [Member]
Business Acquisition [Line Items]
Revenues	30,400
Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Revenues	$ 12,300