Income Taxes (Reconciliation of U.S. Statutory Income Tax Rate) (Details)	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Income Tax Disclosure [Abstract]
US federal statutory rate	35.00%	35.00%	34.00%
State taxes, net of federal benefit	2.30%	2.10%	2.50%
Tax-free and dividend income	(1.50%)	(2.20%)	(9.70%)
Income tax credits	(0.40%)	(1.70%)	(1.70%)
Domestic production activities deduction	(2.80%)	(2.40%)	(1.10%)
Other permanent items	(0.90%)	(0.80%)	4.80%
Valuation allowance	(0.40%)	0.20%	(372.80%)
Uncertain tax positions settlements and adjustments	(1.00%)	(1.10%)	(1.60%)
Amended state returns	0.00%	0.00%	0.60%
Effective tax provision (benefit) rate	30.30%	29.10%	(345.00%)