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Document and Entity Information (USD $)
 12 Months Ended
Jun. 24, 2012
Aug. 14, 2012
Dec. 23, 2011
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-K    
Document Period End Date Jun. 24, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   115,953,015  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 2,472,345,957