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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Feb. 24, 2018
Feb. 25, 2017
Income Tax Disclosure [Abstract]    
Effective income tax rate 29.50% 33.40%
Tax cuts and jobs act of 2017, provisional income tax expense (benefit) $ 1.4  
Unrecognized tax benefits 1.7  
Unrecognized tax benefits that would have an impact on effective tax rate 1.5  
Unrecognized tax benefits, income tax penalties and interest accrued $ 0.5