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Income Taxes (Significant Differences Between Statutory Federal Tax Rate And Effective Income Tax Rate) (Details)
12 Months Ended
Sep. 30, 2016
Oct. 02, 2015
Oct. 03, 2014
Income Taxes [Abstract]      
Statutory U.S. federal income tax rate 35.00% 35.00% 35.00%
Foreign rate differential 0.30% (1.50%) (0.50%)
State income tax, net of federal benefit 6.10% 2.40% 4.40%
Tax credit (3.50%) (18.80%) (6.30%)
Deferred tax asset valuation allowance 0.80% 10.00% (0.30%)
Uncertain tax positions, net of settlements 1.40% 1.70% 5.40%
Goodwill impairment 6.60% 0.00% 10.40%
Section 199 manufacturer's deduction (4.20%) (3.70%) (1.60%)
Amended tax returns 0.00% 3.50% 0.00%
Other 0.40% 4.00% 1.20%
Effective income tax rate, continuing operations, Total 42.90% 32.60% 47.70%