BALANCE SHEET ITEMS - Goodwill and Other Intangible Assets (Details) $ in Thousands	6 Months Ended
Sep. 28, 2018 USD ($) segment	Mar. 31, 2018 USD ($)
Goodwill [Line Items]
Number of operating segments \| segment	4
Activity in goodwill account
Balance, beginning of the year	$ 1,121,170
Divestitures	18,929
Foreign currency translation adjustments	(19,718)
Balance, end of the period	1,082,523
Gross Carrying Amount	590,385	$ 610,950
Accumulated Amortization	(214,978)	(186,517)
Net Carrying Amount	375,407	424,433
HRS
Activity in goodwill account
Balance, beginning of the year	550,983
Divestitures	4,006
Balance, end of the period	527,259
CTG
Activity in goodwill account
Balance, beginning of the year	107,748
Divestitures	4,412
Foreign currency translation adjustments	0
Balance, end of the period	103,336
IEI
Activity in goodwill account
Balance, beginning of the year	337,707
Divestitures	4,120
Foreign currency translation adjustments	0
Balance, end of the period	333,587
CEC
Activity in goodwill account
Balance, beginning of the year	124,732
Divestitures	6,391
Foreign currency translation adjustments	0
Balance, end of the period	118,341
Customer-related intangibles
Activity in goodwill account
Gross Carrying Amount	303,361	306,943
Accumulated Amortization	(98,112)	(79,051)
Net Carrying Amount	205,249	227,892
Licenses and other intangibles
Activity in goodwill account
Gross Carrying Amount	287,024	304,007
Accumulated Amortization	(116,866)	(107,466)
Net Carrying Amount	$ 170,158	$ 196,541

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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