Pension And Postretirement Benefits (Schedule of Pension Plan Weighted-Average Asset Allocation By Cateogry) (Details) (Pension Plan, Defined Benefit [Member])	12 Months Ended
	Aug. 03, 2014	Jul. 28, 2013
Defined Benefit Plan, Target Plan Asset Allocations	100.00%
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations	51.00%
Defined Benefit Plan, Actual Plan Asset Allocations	51.00%	54.00%
Debt Securities [Member]
Defined Benefit Plan, Target Plan Asset Allocations	35.00%
Defined Benefit Plan, Actual Plan Asset Allocations	33.00%	32.00%
Real Estate [Member]
Defined Benefit Plan, Target Plan Asset Allocations	14.00%
Defined Benefit Plan, Actual Plan Asset Allocations	16.00%	14.00%