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Document and Entity Information
 9 Months Ended
Mar. 29, 2015
Apr. 15, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name CREE INC  
Entity Central Index Key 0000895419  
Current Fiscal Year End Date --06-28  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 29, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   109,114,990dei_EntityCommonStockSharesOutstanding
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes