Document and Entity Information Document - shares
9 Months Ended
Mar. 31, 2018
Apr. 19, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name AVNET INC  
Entity Central Index Key 0000008858  
Document Type 10-Q  
Document Period End Date Mar. 31, 2018  
Current Fiscal Year End Date --06-30  
Amendment Flag false  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   117,981,593