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Document and Entity Information - shares
9 Months Ended
Apr. 28, 2018
May 17, 2018
Document Documentand Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 28, 2018  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2018  
Trading Symbol CSCO  
Entity Registrant Name CISCO SYSTEMS, INC.  
Entity Central Index Key 0000858877  
Current Fiscal Year End Date --07-28  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   4,702,882,494