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Income Taxes (Reconciliation of the Federal Statutory Income Tax Rate to Effective Tax Rate) (Details)	12 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Income Tax Disclosure [Abstract]
Income tax expense at federal statutory rate	21.00%	24.50%	35.00%
State income taxes, net of federal tax benefit	5.30%	4.70%	3.80%
One-time, non-cash impact of the Tax Act	0.00%	17.50%	0.00%
Stock compensation excess tax benefit	(0.10%)	(1.10%)	0.00%
Benefit of jobs tax credits, net of valuation allowance	(0.30%)	(0.40%)	(0.40%)
Release of federal tax liability	(0.60%)	0.00%	0.00%
Adjustment to state tax provision	(0.90%)	0.00%	0.00%
Benefit related to COLIs	(1.00%)	(0.40%)	(1.10%)
Termination of interest rate swaps	(2.60%)	0.00%	0.00%
Other, net	0.00%	(0.90%)	(0.40%)
Effective tax rate	20.80%	43.90%	36.90%

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Effective Income Tax Rate Reconciliation, Adjustment to State Tax Provision, Percent

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