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Income Taxes (Reasons For Differences Between Statutory Federal Tax Rate And Effective Income Tax Rate) (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 30, 2017
Sep. 29, 2018
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Income Tax Disclosure [Abstract]          
Federal income tax rate 35.00% 21.00% 24.50% 35.00% 35.00%
State income taxes     3.30% 2.30% 2.70%
Domestic production deduction     (1.70%) (3.10%) (2.60%)
Impairment and Sale of Non-Protein Businesses     3.10% 0.00% 0.00%
Impact of the Tax Act     (37.90%) 0.00% 0.00%
Other     (1.60%) (1.90%) (3.30%)
Effective income tax rate     (10.30%) 32.30% 31.80%