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Basis of Presentation and New Accounting Standards - Narrative (Details)		3 Months Ended						9 Months Ended
	Mar. 01, 2021 USD ($)	Mar. 28, 2021 USD ($)	Dec. 27, 2020 USD ($)	Sep. 27, 2020 USD ($)	Mar. 29, 2020 USD ($)	Dec. 29, 2019 USD ($)	Sep. 29, 2019 USD ($)	Mar. 28, 2021 USD ($) segment	Mar. 29, 2020 USD ($)
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]
Number of reportable segments | segment								1
Proceeds from sale of business, net								$ 36,600,000	$ 0
Net loss		$ (108,100,000)	$ (82,700,000)	$ (184,100,000)	$ (59,900,000)	$ (54,000,000.0)	$ (37,800,000)	$ (374,900,000)	(151,700,000)
Restatement Adjustment
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]
Net loss					$ (1,500,000)				$ (1,500,000)
LED Business | Maximum
Basis of Presentation and Changes in Significant Accounting Policies [Line Items]
Proceeds from sale of business, net	$ 300,000,000

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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