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Cover Page - USD ($)
 12 Months Ended
Jun. 30, 2019
Aug. 16, 2019
Dec. 30, 2018
Cover page.      
Entity Central Index Key 0000895419    
Current Fiscal Year End Date --06-30    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2019    
Document Transition Report false    
Entity File Number 0-21154    
Entity Registrant Name CREE, INC    
Entity Incorporation, State or Country Code NC    
Entity Tax Identification Number 56-1572719    
Entity Address, Address Line One 4600 Silicon Drive    
Entity Address, City or Town Durham    
Entity Address, State or Province NC    
Entity Address, Postal Zip Code 27703    
City Area Code 919    
Local Phone Number 407-5300    
Title of 12(b) Security Common Stock, $0.00125 par value    
Trading Symbol  CREE    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 4,266,297,428
Entity Common Stock, Shares Outstanding   106,975,538