Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 10,739	$ 8,981	$ 7,853
Change in net unrealized gains, net of tax benefit (expense) of $(49), $14, and $(146) for fiscal 2016, 2015, and 2014, respectively	92	(12)	233
Net (gains) losses reclassified into earnings, net of tax expense (benefit) of $0, $57, and $111 for fiscal 2016, 2015, and 2014, respectively	1	(100)	(189)
Total- Available-for-sale investments	93	(112)	44
Change in unrealized gains and losses, net of tax benefit (expense) of $7, $19 and $(6) for fiscal 2016, 2015, and 2014, respectively	(59)	(140)	42
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	16	136	(62)
Total- Cash flow hedging instruments	(43)	(4)	(20)
Net change in cumulative translation adjustment and actuarial gains and losses, net of tax benefit (expense) of $(42), $63, and $(5) for fiscal 2016, 2015 and 2014, respectively	(447)	(498)	44
Other comprehensive income (loss)	(397)	(614)	68
Comprehensive income	10,342	8,367	7,921
Comprehensive (income) loss attributable to noncontrolling interests	10	(2)	1
Comprehensive income attributable to Cisco Systems, Inc.	$ 10,352	$ 8,365	$ 7,922