Pension And Postretirement Benefits (Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost) (Details) (Pension Plans, Defined Benefit [Member])	12 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 31, 2011
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.05%	5.41%	5.46%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.65%	7.90%	8.15%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.31%	3.31%	3.29%