Consolidated Statements Of Equity - USD ($) shares in Millions, $ in Millions	Total	Shares of Common Stock	Common Stock and Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total Cisco Shareholders’ Equity	Non-controlling Interests
Beginning balance (in shares) at Jul. 26, 2014		5,107
Beginning balance at Jul. 26, 2014	$ 56,661		$ 41,884	$ 14,093	$ 677	$ 56,654	$ 7
Net income	8,981			8,981		8,981
Other comprehensive income (loss)	(614)				(616)	(616)	2
Issuance of common stock (in shares)		153
Issuance of common stock	2,016		2,016			2,016
Repurchase of common stock (in shares)		(155)
Repurchase of common stock	(4,234)		(1,291)	(2,943)		(4,234)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)		(20)
Shares repurchased for tax withholdings on vesting of restricted stock units	(502)		(502)			(502)
Cash dividends declared	(4,086)			(4,086)		(4,086)
Tax effects from employee stock incentive plans	41		41			41
Share-based compensation	1,440		1,440			1,440
Purchase acquisitions and other	4		4			4
Ending Balance (in shares) at Jul. 25, 2015		5,085
Ending Balance at Jul. 25, 2015	59,707		43,592	16,045	61	59,698	9
Net income	10,739			10,739		10,739
Other comprehensive income (loss)	(397)				(387)	(387)	(10)
Issuance of common stock (in shares)		113
Issuance of common stock	$ 1,127		1,127			1,127
Repurchase of common stock (in shares)	(148)	(148)
Repurchase of common stock	$ (3,918)		(1,280)	(2,638)		(3,918)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(21)	(21)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (557)		(557)			(557)
Cash dividends declared	(4,750)			(4,750)		(4,750)
Tax effects from employee stock incentive plans	30		30			30
Share-based compensation	1,458		1,458			1,458
Purchase acquisitions and other	146		146			146
Ending Balance (in shares) at Jul. 30, 2016		5,029
Ending Balance at Jul. 30, 2016	63,585		44,516	19,396	(326)	63,586	(1)
Net income	9,609			9,609		9,609
Other comprehensive income (loss)	373				372	372	1
Issuance of common stock (in shares)		92
Issuance of common stock	$ 708		708			708
Repurchase of common stock (in shares)	(118)	(118)
Repurchase of common stock	$ (3,706)		(1,050)	(2,656)		(3,706)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(20)	(20)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (619)		(619)			(619)
Cash dividends declared	(5,511)			(5,511)		(5,511)
Tax effects from employee stock incentive plans	(10)		(10)			(10)
Share-based compensation	1,540		1,540			1,540
Purchase acquisitions and other	168		168			168
Ending Balance (in shares) at Jul. 29, 2017		4,983
Ending Balance at Jul. 29, 2017	$ 66,137		$ 45,253	$ 20,838	$ 46	$ 66,137	$ 0