Goodwill And Intangible Assets (Narrative) (Details)	9 Months Ended
	Apr. 29, 2012	May 01, 2011
Goodwill And Intangible Assets [Abstract]
Amortization of amortizable intangible assets	approximately $1	approximately $1
Estimated aggregated amortization expense year one	less than $1
Estimated aggregated amortization expense year two	less than $1
Estimated aggregated amortization expense year three	less than $1
Estimated aggregated amortization expense year four	less than $1
Estimated aggregated amortization expense year five	less than $1
Asset useful lives minimum range, years	1
Asset useful lives maximum range, years	20