Consolidated Statements Of Equity (USD $) In Millions, except Per Share data	Total	Capital Stock Issued [Member]	Capital Stock In Treasury [Member]	Additional Paid-In Capital [Member]	Earnings Retained In The Business [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Balance, value at Aug. 01, 2010	$ 929	$ 20	$ (7,459)	$ 341	$ 8,760	$ (736)	$ 3
Balance, shares at Aug. 01, 2010		542	(206)
Purchase of investments in noncontrolling interest	8						8
Contribution from noncontrolling interest	10
Net earnings (loss)	802				805		(3)
Other comprehensive income (loss)	309					309
Dividends	(380)				(380)
Dividends per share	$ 1.145
Treasury stock purchased, shares			21
Treasury stock purchased, value	(728)		(728)
Treasury stock issued under management incentive and stock option plans, shares			5
Treasury stock issued under management incentive and stock option plans, value	156		166	(10)
Balance, value at Jul. 31, 2011	1,096	20	(8,021)	331	9,185	(427)	8
Balance, shares at Jul. 31, 2011		542	(222)
Contribution from noncontrolling interest	2						2
Net earnings (loss)	764				774		(10)
Other comprehensive income (loss)	(349)					(349)	0
Dividends	(375)				(375)
Dividends per share	$ 1.16
Treasury stock purchased, shares			13
Treasury stock purchased, value	(412)		(412)
Treasury stock issued under management incentive and stock option plans, shares			5
Treasury stock issued under management incentive and stock option plans, value	172		174	(2)
Balance, value at Jul. 29, 2012	898	20	(8,259)	329	9,584	(776)	0
Balance, shares at Jul. 29, 2012		542	(230)
Contribution from noncontrolling interest	3						3
Net earnings (loss)	449				458		(9)
Other comprehensive income (loss)	210					211	(1)
Dividends	(371)				(371)
Dividends per share	$ 1.16
Treasury stock purchased, shares			4
Treasury stock purchased, value	(153)		(153)
Treasury stock retired, shares	219	(219)	219
Treasury stock retired, value	0	(8)	7,907		(7,899)
Treasury stock issued under management incentive and stock option plans, shares			4
Treasury stock issued under management incentive and stock option plans, value	174		141	33
Balance, value at Jul. 28, 2013	$ 1,210	$ 12	$ (364)	$ 362	$ 1,772	$ (565)	$ (7)
Balance, shares at Jul. 28, 2013		323	(11)