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Income Taxes (Reconciliation Of The Federal Statutory Income Tax Rate To Effective Tax Rate) (Details)
12 Months Ended
Sep. 30, 2018
Oct. 01, 2017
Oct. 02, 2016
Income Tax Disclosure [Abstract]      
Computed at federal statutory rate 24.50% 35.00% 35.00%
Non-cash impact of the Tax Act 17.50% 0.00% 0.00%
State income taxes, net of federal tax benefit 4.70% 3.80% 3.70%
Stock compensation excess tax benefit (1.10%) 0.00% 0.00%
Benefit of jobs tax credits, net of valuation allowance (0.40%) (0.40%) (1.00%)
Benefit related to COLIs (0.40%) (1.10%) (1.50%)
Other, net (0.90%) (0.40%) 0.10%
Effective tax rate 43.90% 36.90% 36.30%