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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%