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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 17, 2020 segment | Jul. 17, 2017 USD ($) | Jun. 28, 2020 USD ($) board_member segment | Jun. 30, 2019 USD ($) | Jun. 24, 2018 USD ($) | Jul. 01, 2019 USD ($)
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Prior period reclassification adjustment |  |  | $ 0 |  |  |
Number of operating segments | segment | 2 |  | 1 |  |  |
Number of reportable segments | segment | 2 |  | 1 |  |  |
Other-than-temporary impairment losses on investments |  |  | $ 0 | $ 0 | $ 0 |
Advertising costs |  |  | 3,800,000 | 3,700,000 | 3,500,000 |
Net income from discontinued operations attributable to noncontrolling interest |  |  | 1,100,000 | 0.0 | 100,000 |
Cash paid for interest |  |  | 5,900,000 | 4,000,000.0 | 6,100,000 |
Cash paid for income taxes, net of refunds received |  |  | $ 3,600,000 | $ 500,000 |  |
Cash refunds received, net of taxes |  |  |  |  | $ 5,400,000 |
Accounting Standards Update [Extensible List] |  |  |  | us-gaap:AccountingStandardsUpdate201409Member |  |
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible List] |  |  | us-gaap:AccountingStandardsUpdate201602ModifiedRetrospectiveMember |  |  |
Lease liability |  |  | $ 12,300,000 |  |  |
Right-of-use assets |  |  | $ 12,300,000 |  |  |
Cree Venture LED |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Payments to acquire interest in joint venture |  | $ 5,100,000 |  |  |  |
Ownership interest by parent (as a percent) |  | 51.00% |  |  |  |
Number of directors | board_member |  |  | 5 |  |  |
Number of directors appointed by company | board_member |  |  | 3 |  |  |
San'an Optoelectronics Co., Ltd. | Cree Venture LED |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Proceeds from issuing Cree Venture LED stock to noncontrolling interest |  | $ 4,900,000 |  |  |  |
Ownership interest by noncontrolling owners (as a percent) |  | 49.00% |  |  |  |
Number of directors appointed by company | board_member |  |  | 2 |  |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Accounting Standards Update [Extensible List] |  |  | us-gaap:AccountingStandardsUpdate201602Member |  |  |
Lease liability |  |  |  |  |  | $ 11,000,000.0
Right-of-use assets |  |  |  |  |  | $ 11,000,000.0
Accounting Standards Update 2018-10 |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Accounting Standards Update [Extensible List] |  |  | us-gaap:AccountingStandardsUpdate201810Member |  |  |
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Currency translation gains (losses) reclassified to earnings |  |  |  | $ (5,200,000) |  |
Minimum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of finite-lived intangible assets |  |  | 4 years |  |  |
Number of renewal options | segment |  |  | 1 |  |  |
Renewal term of leases |  |  | 1 year |  |  |
Maximum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of finite-lived intangible assets |  |  | 15 years |  |  |
Renewal term of leases |  |  | 5 years |  |  |
Patents | Maximum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of finite-lived intangible assets |  |  | 20 years |  |  |
Furniture and fixtures |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 5 years |  |  |
Buildings and building improvements | Minimum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 5 years |  |  |
Buildings and building improvements | Maximum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 40 years |  |  |
Machinery and equipment | Minimum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 3 years |  |  |
Machinery and equipment | Maximum |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 15 years |  |  |
Vehicles |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 5 years |  |  |
Computer hardware/software |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of property, plant and equipment |  |  | 3 years |  |  |
Lextar |  |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |  |
Common stock ownership interest (as a percent) |  |  | 16.00% |  |  |

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