Supplemental Information (Stock Repurchases Since Inception of Program) (Details) - USD ($) shares in Millions, $ in Millions	Oct. 24, 2015	Jul. 25, 2015	[1]
Supplementary Information [Line Items]
Authorized common stock repurchase amount	$ 97,000
Cumulative stock repurchased and retired (in shares)	4,488	4,443
Repurchases of common stock under the repurchase program	$ 93,886	$ 92,679
Shares of Common Stock (in shares)
Supplementary Information [Line Items]
Cumulative stock repurchased and retired (in shares)	4,488
Common Stock and Additional Paid-In Capital
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	$ 23,001
Retained Earnings
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	70,885
Total Cisco Shareholders’ Equity
Supplementary Information [Line Items]
Repurchases of common stock under the repurchase program	$ 93,886

[1] There were $36 million of stock repurchases that were pending settlement as of July 25, 2015.