Supplemental Information (Details) (USD $) Share data in Millions, unless otherwise specified	Jan. 28, 2012	Jul. 30, 2011
Authorized common stock repurchase amount	$ 82,000,000,000
Repurchases of common stock under the repurchase program, shares	3,604	3,478
Repurchases of common stock under the repurchase program, value	73,783,000,000	71,773,000,000
Shares Of Common Stock [Member]
Repurchases of common stock under the repurchase program, shares	3,604
Common Stock And Additional Paid-In Capital [Member]
Repurchases of common stock under the repurchase program, value	16,052,000,000
Retained Earnings [Member]
Repurchases of common stock under the repurchase program, value	57,731,000,000
Total Cisco Shareholders' Equity [Member]
Repurchases of common stock under the repurchase program, value	$ 73,783,000,000