Consolidated Statements Of Equity (USD $) In Millions, unless otherwise specified	Total USD ($)		Common Stock	Common Stock Including Additional Paid in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Parent USD ($)	Noncontrolling Interest [Member] USD ($)
Stockholders' Equity Attributable to Noncontrolling Interest at Jul. 28, 2012								$ 15
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 28, 2012	51,301
Stockholders' Equity Attributable to Parent at Jul. 28, 2012				39,271	11,354	661	51,286
Shares, Issued at Jul. 28, 2012			5,298
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,713				7,713		7,713
Other Comprehensive Income (Loss), Net of Tax	23					28	28	(5)
Stock Issued During Period, (In shares)			111
Stock Issued During Period, Value, New Issues	1,193			1,193			1,193
Repurchased Shares During Period ( In shares)			(81)
Stock Repurchased During Period, Value	(1,613)			(606)	(1,007)		(1,613)
Shares Repurchased In Settlement Of Employee Tax Withholding Obligations ( In shares)	(13)		(13)
Adjustments Related to Tax Withholding for Share-based Compensation	(249)			(249)			(249)
Cash dividends declared	(2,392)				(2,392)		(2,392)
Tax effects from employee stock incentive plans	(120)			(120)			(120)
Share-based Compensation, Requisite Service Period Recognition	880			880			880
Stock Issued During Period, Value, Acquisitions	62			62			62
Stockholders' Equity Attributable to Noncontrolling Interest at Apr. 27, 2013								10
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Apr. 27, 2013	56,798
Stockholders' Equity Attributable to Parent at Apr. 27, 2013				40,431	15,668	689	56,788
Shares, Issued at Apr. 27, 2013			5,315
Stockholders' Equity Attributable to Noncontrolling Interest at Jul. 27, 2013	8							8
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jul. 27, 2013	59,128
Stockholders' Equity Attributable to Parent at Jul. 27, 2013	59,120			42,297	16,215	608	59,120
Shares, Issued at Jul. 27, 2013			5,389
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,606				5,606		5,606
Other Comprehensive Income (Loss), Net of Tax	90					89	89	1
Stock Issued During Period, (In shares)			100
Stock Issued During Period, Value, New Issues	1,053			1,053			1,053
Repurchased Shares During Period ( In shares)	(359)	[1]	(359)
Stock Repurchased During Period, Value	(8,025)			(2,837)	(5,188)		(8,025)
Shares Repurchased In Settlement Of Employee Tax Withholding Obligations ( In shares)	(14)		(14)
Adjustments Related to Tax Withholding for Share-based Compensation	(345)			(345)			(345)
Cash dividends declared	(2,784)				(2,784)		(2,784)
Tax effects from employee stock incentive plans	16			16			16
Share-based Compensation, Requisite Service Period Recognition	1,009			1,009			1,009
Stock Issued During Period, Value, Acquisitions	48			48			48
Stockholders' Equity Attributable to Noncontrolling Interest at Apr. 26, 2014	9							9
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Apr. 26, 2014	55,796
Stockholders' Equity Attributable to Parent at Apr. 26, 2014	$ 55,787			$ 41,241	$ 13,849	$ 697	$ 55,787
Shares, Issued at Apr. 26, 2014			5,116

[1] Includes stock repurchases of $60 million, which were pending settlement as of April 26, 2014. There were no stock repurchases pending settlement as of July 27, 2013.