Restructuring Charges (Schedule Of Pre-Tax Charges And Remaining Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				22 Months Ended				37 Months Ended
	Aug. 03, 2014 2014 Initiatives [Member]	Aug. 03, 2014 2014 Initiatives [Member] Severance Pay And Benefits [Member]	Aug. 03, 2014 2014 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 2014 Initiatives [Member] Other Restructuring [Member]	Aug. 03, 2014 2013 Initiatives [Member]	Aug. 03, 2014 2013 Initiatives [Member] Severance Pay And Benefits [Member]	Aug. 03, 2014 2013 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 2013 Initiatives [Member] Other Restructuring [Member]	Aug. 03, 2014 2011 Initiatives [Member]	Aug. 03, 2014 2011 Initiatives [Member] Severance Pay And Benefits [Member]	Aug. 03, 2014 2011 Initiatives [Member] Asset Impairment Accelerated Depreciation [Member]	Aug. 03, 2014 2011 Initiatives [Member] Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 56	$ 42	$ 12	$ 2	$ 148	$ 35	$ 99	$ 14
Restructuring and Related Cost, Cost Incurred to Date	(54)	(41)	(12)	(1)	(146)	(35)	(99)	(12)	(73)	(41)	(23)	(9)
Restructuring and Related Cost, Expected Cost Remaining	$ 2	$ 1	$ 0	$ 1	$ 2	$ 0	$ 0	$ 2