Restructuring Charges Restructuring Charges (Schedule Of Pre-Tax Charges And Remaining Costs 2011 Iniative) (Details) (2011 Initiatives [Member], USD $) In Millions, unless otherwise specified	19 Months Ended
	Jan. 27, 2013
Restructuring Cost and Reserve [Line Items]
Total Program	$ 74
Recognized as of end of period	(73)
Remaining Costs to be Recognized	1
Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Total Program	41
Recognized as of end of period	(41)
Remaining Costs to be Recognized	0
Asset Impairment Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Total Program	23
Recognized as of end of period	(23)
Remaining Costs to be Recognized	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Total Program	10
Recognized as of end of period	(9)
Remaining Costs to be Recognized	$ 1