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 Jul. 31, 2011	$ 1,096	$ 20	$ (8,021)	$ 331	$ 9,185	$ (427)	$ 8
Balance, shares at Jul. 31, 2011		542	(222)
Net earnings (loss)	464				470		(6)
Other comprehensive income (loss), after tax	(58)					(58)	0
Dividends	(189)				(189)
Dividends	$ 0.58
Treasury stock purchased, shares	(5)
Treasury stock purchased, value	(173)
Treasury stock issued under management incentive and stock option plans, shares			2
Treasury stock issued under management incentive and stock option plans, value	57		56	1
Balance, value at Jan. 29, 2012	1,197	20	(8,138)	332	9,466	(485)	2
Balance, shares at Jan. 29, 2012		542	(225)
Balance, value at Jul. 29, 2012	898	20	(8,259)	329	9,584	(776)	0
Balance, shares at Jul. 29, 2012		542	(230)
Net earnings (loss)	430				435		(5)
Other comprehensive income (loss), after tax	76					76	0
Dividends	(279)				(279)
Dividends	$ 0.87
Treasury stock purchased, shares	(2)		(2)
Treasury stock purchased, value	(63)
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			3
Treasury stock issued under management incentive and stock option plans, value	93		91	2
Balance, value at Jan. 27, 2013	$ 1,155	$ 12	$ (324)	$ 331	$ 1,841	$ (700)	$ (5)
Balance, shares at Jan. 27, 2013		323	(10)