Document and Entity Information Document - shares
6 Months Ended
Dec. 29, 2018
Jan. 17, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name AVNET INC  
Entity Central Index Key 0000008858  
Document Type 10-Q  
Document Period End Date Dec. 29, 2018  
Current Fiscal Year End Date --06-29  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   108,427,879