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Discontinued Operations - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Oct. 18, 2020 | Dec. 27, 2020 | Sep. 27, 2020 | Dec. 29, 2019 | Dec. 27, 2020 | Dec. 29, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Term of certain silicon carbide materials and fabrication services | 4 years |  |  |  |  |
Discontinued Operations, Held-for-sale | LED Business |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash received from divestiture | $ 50,000,000 |  |  |  |  |
Unsecured promissory note issued to parent in disposition | $ 125,000,000 |  |  |  |  |
Goodwill impairment |  | $ 6,900,000 | $ 105,700,000 | $ 0 | $ 112,600,000 | $ 0
Impairment on assets held for sale |  | $ 19,500,000 |  | $ 0 | $ 19,500,000 | $ 0
Discontinued Operations, Held-for-sale | LED Business | Purchase Price Note | Unsecured Promissory Note | 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% |  |  |  |  |
Discontinued Operations, Held-for-sale | LED Business | 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 |  |  |  |  |

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- Definition The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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