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. 25, 2015		5,085
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	5,577			5,577		5,577
Other comprehensive income (loss)	(870)				(868)	(868)	(2)
Issuance of common stock (in shares)		76
Issuance of common stock	701		701			701
Repurchase of common stock (in shares)		(93)
Repurchase of common stock	$ (2,469)		(801)	(1,668)		(2,469)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(16)	(16)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (412)		(412)			(412)
Cash dividends declared (per common share)	(2,133)			(2,133)		(2,133)
Tax effects from employee stock incentive plans	28		28			28
Share-based compensation	706		706			706
Purchase acquisitions and other	43		43			43
Ending Balance (in shares) at Jan. 23, 2016		5,052
Ending Balance at Jan. 23, 2016	60,878		43,857	17,821	(807)	60,871	7
Beginning balance (in shares) at Jul. 30, 2016		5,029
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	4,670			4,670		4,670
Other comprehensive income (loss)	(467)				(475)	(475)	8
Issuance of common stock (in shares)		57
Issuance of common stock	$ 386		386			386
Repurchase of common stock (in shares)	(65)	(65)
Repurchase of common stock	$ (2,002)		(575)	(1,427)		(2,002)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)	(14)	(14)
Shares repurchased for tax withholdings on vesting of restricted stock units	$ (432)		(432)			(432)
Cash dividends declared (per common share)	(2,612)			(2,612)		(2,612)
Tax effects from employee stock incentive plans	(54)		(54)			(54)
Share-based compensation	738		738			738
Purchase acquisitions and other	6		6			6
Ending Balance (in shares) at Jan. 28, 2017		5,007
Ending Balance at Jan. 28, 2017	$ 63,818		$ 44,585	$ 20,027	$ (801)	$ 63,811	$ 7