Document and Entity Information - USD ($)
12 Months Ended
Jun. 26, 2016
Dec. 24, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name CREE INC  
Entity Central Index Key 0000895419  
Current Fiscal Year End Date --06-26  
Entity Filer Category Large Accelerated Filer  
Document Type 10-K  
Document Period End Date Jun. 26, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus FY  
Amendment Flag false  
Entity Common Stock, Shares Outstanding 100,850,243  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Public Float   $ 2,821,982,837