XML 16 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - shares
 3 Months Ended
Sep. 23, 2018
Oct. 12, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name CREE INC  
Entity Central Index Key 0000895419  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 23, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   102,559,333
Entity Emerging Growth Company false  
Entity Small Business false