Stock Repurchases Since Inception of Program (Detail) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011
Supplementary Information [Line Items]
Authorized common stock repurchase amount	$ 82,000,000,000
Cumulative Repurchases of common stock under the repurchase program, shares	3,868	3,740	3,478
Cumulative Repurchases of common stock under the repurchase program, value	78,906,000,000	76,133,000,000	71,773,000,000
Common Stock and Additional Paid-In Capital
Supplementary Information [Line Items]
Cumulative Repurchases of common stock under the repurchase program, value	18,002,000,000
Retained Earnings
Supplementary Information [Line Items]
Cumulative Repurchases of common stock under the repurchase program, value	60,904,000,000
Total Cisco Shareholders' Equity
Supplementary Information [Line Items]
Cumulative Repurchases of common stock under the repurchase program, value	$ 78,906,000,000