Supplemental Information (Stock Repurchases Since Inception of Program) (Details) (USD $)	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012
Supplementary Information [Line Items]
Authorized common stock repurchase amount	$ 97,000,000,000
Repurchases of common stock under the repurchase program	88,445,000,000	78,906,000,000	76,133,000,000
Shares of Common Stock
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	4,288,000,000
Common Stock and Additional Paid-In Capital
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	21,324,000,000
Retained Earnings
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	67,121,000,000
Total Cisco Shareholders’ Equity
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	$ 88,445,000,000