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Shareholders' Equity (Comprehensive Income) (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 31, 2010
Comprehensive Income (Loss) [Line Items]      
Net income $ 8,041 $ 6,490 $ 7,767
Change in net unrealized (losses) gains, net of tax benefit (expense) of $6, $(151), and $(199) for fiscal 2012, 2011 and 2010, respectively (31) 281 334
Net (gains) losses reclassified into earnings, net of tax effects of $36, $68, and $17 for fiscal 2012, 2011 and 2010, respectively (65) (112) (151)
Net change in unrealized gains/losses on available-for-sale investments, Total (96) 169 183
Change in derivative instruments, net of tax benefit (expense) of $0, $0 and $(9) for fiscal 2012, 2011 and 2010, respectively (131) 87 46
Net losses (gains) reclassified into earnings 72 (108) 2
Net change in unrealized gains/losses on derivative instruments, Total (59) (21) 48
Net change in cumulative translation adjustment and other, net of tax benefit (expense) of $36, $(34), and $(9) for fiscal 2012, 2011 and 2010, respectively (496) 538 (55)
Comprehensive income 7,390 7,176 7,943
Comprehensive loss (income) attributable to noncontrolling interests 18 (15) 12
Comprehensive income attributable to Cisco Systems, Inc. $ 7,408 $ 7,161 $ 7,955