Description Of Business And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Aug. 30, 2014 State	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Number of contiguous states	46
Cash overdrafts	$ 76,000,000	$ 100,500,000
Cash and cash equivalents	139,840,000	140,999,000	92,333,000	141,405,000
Restricted Account	34,400,000	55,500,000
Restricted Cash and Cash Equivalents, Current	31,400,000	35,400,000
Restricted Cash and Cash Equivalents, Noncurrent	3,000,000	20,100,000
Interest Costs Capitalized	2,700,000	7,300,000	4,000,000
Revenue Recognition, Gift Cards, Breakage	1,600,000
Advertising costs	7,800,000	18,900,000	19,600,000
Number Stores Closed - Restructuring	377
Asset Impairment Charges	19,926,000	0	0
Wholly Owned Subsidiary [Member]
Cash and cash equivalents	4,000,000	2,700,000
Available-for-sale Securities	$ 8,800,000	$ 27,000,000
Minimum [Member]
Number of stores	8,000
Majority Of Products [Member] | Maximum [Member]
Selling price per product	10
Many Products [Member] | Maximum [Member]
Selling price per product	1
Software [Member] | Minimum [Member]
Estimated useful lives, minimum (in years)	3 years
Software [Member] | Maximum [Member]
Estimated useful lives, minimum (in years)	8 years
Real Estate [Member]
Duration of renewal option	5 years
Real Estate [Member] | Minimum [Member]
Lease term (in years)	5 years
Real Estate [Member] | Maximum [Member]
Lease term (in years)	15 years
Equipment [Member] | Minimum [Member]
Lease term equipment (in years)	5 years
Equipment [Member] | Maximum [Member]
Lease term equipment (in years)	10 years
Leasehold Improvements [Member] | Minimum [Member]
Estimated useful lives, minimum (in years)	5 years
Lease term equipment (in years)	5 years
Leasehold Improvements [Member] | Maximum [Member]
Estimated useful lives, minimum (in years)	10 years
Lease term equipment (in years)	15 years