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. 29, 2012	$ 898	$ 20	$ (8,259)	$ 329	$ 9,584	$ (776)	$ 0
Treasury stock, shares at Jul. 29, 2012			(230)
Capital stock, shares at Jul. 29, 2012		542
Contribution from noncontrolling interest	3						3
Net earnings (loss)	609				616		(7)
Other comprehensive income (loss)	67					67	0
Dividends	(279)				(279)
Dividends per share	$ 0.87
Treasury stock purchased, shares			(4)
Treasury stock purchased, value	(139)		(139)
Treasury stock retired, shares		(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	154		126	28
Balance, value at Apr. 28, 2013	1,313	12	(365)	357	2,022	(709)	(4)
Treasury stock, shares at Apr. 28, 2013			(11)
Capital stock, shares at Apr. 28, 2013		323
Balance, value at Jul. 28, 2013	1,210	12	(364)	362	1,772	(565)	(7)
Treasury stock, shares at Jul. 28, 2013			(11)
Capital stock, shares at Jul. 28, 2013		323
Contribution from noncontrolling interest	5						5
Net earnings (loss)	672				681		(9)
Other comprehensive income (loss)	38					38	0
Dividends	(294)				(294)
Dividends per share	$ 0.936
Treasury stock purchased, shares			(2)
Treasury stock purchased, value	(76)		(76)
Treasury stock issued under management incentive and stock option plans, shares			2
Treasury stock issued under management incentive and stock option plans, value	36		76	(40)
Balance, value at Apr. 27, 2014	$ 1,591	$ 12	$ (364)	$ 322	$ 2,159	$ (527)	$ (11)
Treasury stock, shares at Apr. 27, 2014			(11)
Capital stock, shares at Apr. 27, 2014		323