Consolidated Statements Of Equity - USD ($) $ 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. 25, 2015		5,085,000,000
Beginning balance at Jul. 25, 2015	$ 59,707		$ 43,592	$ 16,045	$ 61	$ 59,698	$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,926			7,926		7,926
Other comprehensive income (loss)	(297)				(288)	(288)	(9)
Issuance of common stock (in shares)		87,000,000
Issuance of common stock	771		771			771
Repurchase of common stock (in shares)		(120,000,000)
Repurchase of common stock	$ (3,118)		(1,036)	(2,082)		(3,118)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(18,000,000)	(18,000,000)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (469)		(469)			(469)
Cash dividends declared	(3,441)			(3,441)		(3,441)
Tax effects from employee stock incentive plans	32		32			32
Share-based compensation	1,101		1,101			1,101
Purchase acquisitions and other	146		146			146
Ending Balance (in shares) at Apr. 30, 2016		5,034,000,000
Ending Balance at Apr. 30, 2016	62,358		44,137	18,448	(227)	62,358	0
Beginning balance (in shares) at Jul. 30, 2016		5,029,000,000
Beginning balance at Jul. 30, 2016	63,585		44,516	19,396	(326)	63,586	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,185			7,185		7,185
Other comprehensive income (loss)	(15)				(16)	(16)	1
Issuance of common stock (in shares)		65,000,000
Issuance of common stock	$ 418		418			418
Repurchase of common stock (in shares)	(80,000,000)	(80,000,000)
Repurchase of common stock	$ (2,505)		(708)	(1,797)		(2,505)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(16,000,000)	(16,000,000)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (497)		(497)			(497)
Cash dividends declared	(4,063)			(4,063)		(4,063)
Tax effects from employee stock incentive plans	(34)		(34)			(34)
Share-based compensation	1,138		1,138			1,138
Purchase acquisitions and other	170		170			170
Ending Balance (in shares) at Apr. 29, 2017		4,998,000,000
Ending Balance at Apr. 29, 2017	$ 65,382		$ 45,003	$ 20,721	$ (342)	$ 65,382	$ 0