Supplemental Information (Stock Repurchases Since Inception of Program) (Details) (USD $) Share data in Millions, unless otherwise specified	Jan. 24, 2015	Jul. 26, 2014
Supplementary Information [Line Items]
Authorized common stock repurchase amount	$ 97,000,000,000
Cumulative stock repurchased and retired (in shares)	4,373	4,288
Repurchases of common stock under the repurchase program	90,666,000,000	88,445,000,000
Shares of Common Stock (in shares)
Supplementary Information [Line Items]
Cumulative stock repurchased and retired (in shares)	4,373
Common Stock and Additional Paid-In Capital
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	22,021,000,000
Retained Earnings
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	68,645,000,000
Total Cisco Shareholders’ Equity
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	$ 90,666,000,000