Restructuring Charges (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		1 Months Ended				4 Months Ended	6 Months Ended	4 Months Ended			6 Months Ended		4 Months Ended		3 Months Ended	6 Months Ended		12 Months Ended	19 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013 MEXICO	Jan. 27, 2013 MEXICO Severance Pay And Benefits [Member]	Jan. 27, 2013 MEXICO Asset Impairment Accelerated Depreciation [Member]	Jan. 27, 2013 MEXICO Other Restructuring [Member]	Jan. 27, 2013 2013 Initiatives [Member]	Jan. 27, 2013 2013 Initiatives [Member]	Jan. 27, 2013 2013 Initiatives [Member] Severance Pay And Benefits [Member]	Jan. 27, 2013 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Jan. 27, 2013 2013 Initiatives [Member] Other Restructuring [Member]	Jan. 27, 2013 2013 Initiatives [Member] Sacramento, CA [Member]	Jan. 27, 2013 2013 Initiatives [Member] South Plainfield, NJ [Member]	Jan. 27, 2013 2013 Initiatives [Member] U.S. Simple Meals [Member]	Jan. 27, 2013 2013 Initiatives [Member] U.S. Beverages [Member]	Jul. 31, 2011 2011 Initiatives [Member]	Jan. 27, 2013 2011 Initiatives [Member]	Jan. 29, 2012 2011 Initiatives [Member]	Jul. 29, 2012 2011 Initiatives [Member]	Jan. 27, 2013 2011 Initiatives [Member]	Jan. 27, 2013 2011 Initiatives [Member] Severance Pay And Benefits [Member]	Jan. 27, 2013 2011 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Jan. 27, 2013 2011 Initiatives [Member] Other Restructuring [Member]	Jan. 27, 2013 2011 Initiatives [Member] Camden New Jersey [Member]	Jan. 27, 2013 2011 Initiatives [Member] Outsource Of U.S. Retail Merchandising [Member]	Jan. 27, 2013 2011 Initiatives [Member] Moscow [Member]	Jan. 27, 2013 2011 Initiatives [Member] U.S. Simple Meals [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated					260					727				700	27				190
Curtailment loss					$ 3
Asset Impairment Charges					3
Positions eliminated																						510				130	190	50
Restructuring charges	8	3	30	5	6					24								63		5	10
Restructuring Reserve, Accelerated Depreciation										61
Restructuring charges and related costs, after tax										53
Restructuring charges, after tax					4													41		3	6
Restructuring charges per diluted share					$ 0.01					$ 0.17								$ 0.12		$ 0.01	$ 0.02
Restructuring and Related Cost, Expected Cost					9	1	1	1	115		25	75	15									74	41	23	10
Expected cash expenditures					4				38													50
Expected investment in capital expenditures									27													40
Payments for (Proceeds from) Productive Assets																						27
Aggregate pre-tax costs expected to be incurred									$ 30		$ 3	$ 14	$ 13			$ 23	$ 7					$ 1	$ 0	$ 0	$ 1				$ 1