Document and Entity Information (USD $)
12 Months Ended
Jun. 29, 2014
Aug. 21, 2014
Dec. 27, 2013
Document and Entity Information [Abstract]      
Entity Registrant Name CREE INC    
Entity Central Index Key 0000895419    
Current Fiscal Year End Date --06-29    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Jun. 29, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   120,040,796  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 7,379,080,394