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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 01, 2018
Nov. 25, 2017
Nov. 26, 2016
Income Tax Disclosure [Abstract]      
Effective income tax rate   35.50% 38.80%
Discrete tax benefits related to adoption new policy   $ 1.6  
Subsequent Event [Line Items]      
U.S. federal income tax rate   35.00%  
Subsequent event      
Subsequent Event [Line Items]      
U.S. federal income tax rate 21.00%