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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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Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=cree_LEDBusinessLightingProductsMember
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Data Type: | na
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