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Discontinued Operations - Narrative (Details) - USD ($)		3 Months Ended				12 Months Ended
	Mar. 01, 2021	Jun. 27, 2021	Mar. 28, 2021	Dec. 27, 2020	Sep. 27, 2020	Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable, net		$ 95,900,000				$ 95,900,000	$ 72,400,000
Cost of selling business					$ 27,400,000
Term of certain silicon carbide materials and fabrication services	4 years
LED Business | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale						(29,100,000)	0	$ 0
Accounts receivable, net							41,600,000
Cash received from divestiture	$ 50,000,000
Unsecured promissory note issued to parent in disposition	125,000,000
Cost of selling business						27,400,000
Goodwill impairment				$ (6,900,000)	$ (105,700,000)	(112,600,000)	0	0
Impairment on assets held for sale			$ 19,500,000			19,500,000	0	0
Income tax expense			4,100,000			11,000,000.0	8,200,000	17,100,000
Other long-term liabilities	$ 31,000,000.0		22,700,000				9,800,000
Non-operating expense		800,000
Other assets			$ 7,000,000.0				1,700,000
LED Business | Discontinued Operations, Disposed of by Sale | Purchase Price Note | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Basis spread on variable rate of debt instrument (as a percent)	3.00%
LED Business | Discontinued Operations, Disposed of by Sale | Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential earn-out payment	$ 2,500,000
LED Business | Discontinued Operations, Disposed of by Sale | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential earn-out payment	$ 125,000,000
Term of real estate license agreement	24 months
LED Business, Real Estate License Agreement | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Administrative fees						1,200,000
LED Business, Real Estate License Agreement | Discontinued Operations, Disposed of by Sale | Accounts Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Administrative fees						300,000
Transition Service Agreement | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Administrative fees						4,200,000	10,500,000	1,600,000
Accrued administrative fees		100,000				100,000	1,600,000
Administrative fees						4,000,000.0
Transition Service Agreement | Discontinued Operations, Disposed of by Sale | Accounts Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Administrative fees						700,000
LED Supply Agreement | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue						4,200,000	$ 12,000,000.0	2,100,000
Accounts receivable, net		700,000				700,000
Contract liability		$ 9,900,000				$ 9,900,000
Lighting Products | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received on disposal of assets								219,000,000.0
Loss on sale								$ 66,200,000

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