Income Taxes (Reconciliation Of The Federal Statutory Income Tax Rate To Effective Tax Rate) (Details)	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Income Tax Disclosure [Abstract]
Computed at federal statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	3.70%	3.30%	3.40%
Benefit of jobs tax credits	(1.10%)	(1.20%)	(1.90%)
Expense/(benefit) related to COLIs	0.30%	(1.60%)	(2.90%)
Others, net	(1.00%)	(0.20%)	(0.80%)
Effective tax rate	36.90%	35.30%	32.80%