Supplemental Financial Statement Data (Schedule of Statement of Earnings) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended						12 Months Ended
	Aug. 03, 2014	Apr. 27, 2014	Jan. 26, 2014	Oct. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Aug. 03, 2014		Jul. 28, 2013		Jul. 29, 2012
Derivative, Gain (Loss) on Derivative, Net	$ 0	$ 0	$ 0	$ (6)
Foreign Currency Transaction Gain (Loss), before Tax							6	[1]	3	[1]	(3)	[1]
Amortization of Intangible Assets							18		14		1
Business Combination, Acquisition Related Costs					10	5	0		10		5
Other Nonoperating Expense							(2)		2		8
Other General Expense							22		29		11
Advertising Expense							411	[2]	419	[2]	476	[2]
Interest Costs Incurred							124		138		116
Interest Costs Capitalized							(2)		(3)		(2)
Interest Expense							122		135		114
Corporate, Non-Segment [Member] | Foreign Exchange Contract [Member]
Derivative, Gain (Loss) on Derivative, Net							$ (9)

[1] 2014 included a loss of $9 on foreign exchange forward contracts used to hedge the proceeds from the sale of the European simple meals business.

[2] Included in Marketing and selling expenses.