Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

GOODWILL AND PURCHASED INTANGIBLE ASSETS (Details) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended	12 Months Ended
	Sep. 26, 2020 USD ($)	Mar. 28, 2020 USD ($) unit	Sep. 28, 2019 USD ($)	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Dec. 28, 2019 unit	Mar. 28, 2020 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of Reporting Units \| unit		4				1
Goodwill, Impairment Loss		$ 483,700					$ 323,088
Amortization of Intangible Assets	$ 31,400		$ 46,000	$ 63,800	$ 91,300