v3.8.0.1
Document and Entity Information - shares
3 Months Ended
Sep. 24, 2017
Oct. 13, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name CREE INC  
Entity Central Index Key 0000895419  
Current Fiscal Year End Date --06-24  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 24, 2017  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   98,135,192
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes