Consolidated Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 27, 2013	Apr. 28, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 2,478	$ 2,165	$ 7,713	$ 6,124
Change in net unrealized gains, net of tax benefit (expense) of $38 and $(7) for the three and nine months ended April 27, 2013, respectively, and $(67) and $(39) for the corresponding periods of fiscal 2012, respectively	(63)	98	10	55
Net gains reclassified into earnings, net of tax effects of $2 and $16 for the three and nine months ended April 27, 2013, respectively, and $11 and $27 for the corresponding periods of fiscal 2012, respectively	(4)	(18)	(30)	(48)
Total available-for-sale investments	(67)	80	(20)	7
Change in unrealized gains and losses, net of tax benefit (expense) of $1 and $(1) for the three and nine months ended April 27, 2013, and $0 for both corresponding periods of fiscal 2012	(10)	11	58	(83)
Net (gains) losses reclassified into earnings	(4)	18	(7)	44
Total cash flow hedging instruments	(14)	29	51	(39)
Net change in cumulative translation adjustment and other, net of tax benefit (expense) of $1 and $(14) for the three and nine months ended April 27, 2013, respectively, and $0 and $31 for the corresponding periods of fiscal 2012, respectively	(128)	21	(8)	(296)
Other comprehensive income (loss)	(209)	130	23	(328)
Comprehensive income	2,269	2,295	7,736	5,796
Comprehensive (income) loss attributable to noncontrolling interests	0	(2)	5	12
Comprehensive income attributable to Cisco Systems, Inc.	$ 2,269	$ 2,293	$ 7,741	$ 5,808