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Income Taxes (Reconciliation of U.S. Statutory Income Tax Rate) (Details)	12 Months Ended
	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Income Tax Disclosure [Abstract]
US federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	2.40%	2.30%	2.10%
Tax-free and dividend income	(1.30%)	(1.50%)	(2.20%)
Income tax credits	(0.30%)	(0.40%)	(1.70%)
Domestic production activities deduction	(3.70%)	(2.80%)	(2.40%)
Other permanent items	(0.80%)	(0.90%)	(0.80%)
Valuation allowance	0.00%	(0.40%)	0.20%
Uncertain tax positions settlements and adjustments	(0.50%)	(1.00%)	(1.10%)
Effective tax provision rate	30.80%	30.30%	29.10%

X

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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