Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 7,853	$ 9,983	$ 8,041
Change in net unrealized gains, net of tax benefit (expense) of $(146), $(2), and $6 for fiscal 2014, 2013, and 2012, respectively	233	(6)	(31)
Net gains reclassified into earnings, net of tax expense of $111, $17, and $36 for fiscal 2014, 2013, and 2012, respectively	(189)	(31)	(65)
Total- Available-for-sale investments	44	(37)	(96)
Change in unrealized gains and losses, net of tax benefit (expense) of $0, $(1), and $0 for fiscal 2014, 2013, and 2012, respectively	48	73	(131)
Net (gains) losses reclassified into earnings	(68)	(12)	72
Total- Cash flow hedging instruments	(20)	61	(59)
Net change in cumulative translation adjustment and other, net of tax benefit (expense) of $(5), $(1), and $36 for fiscal 2014, 2013, and 2012, respectively	44	(84)	(496)
Other comprehensive income(loss)	68	(60)	(651)
Comprehensive income	7,921	9,923	7,390
Comprehensive (income) loss attributable to noncontrolling interests	1	7	18
Comprehensive income attributable to Cisco Systems, Inc.	$ 7,922	$ 9,930	$ 7,408