Retirement Plan (Schedule Of Defined Benefit Pension Plan Asset Allocations) (Details)	Oct. 01, 2016	Sep. 26, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan asset allocation	100.00%	100.00%
Equity Securities And Equity-Like Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan asset allocation	29.00%	51.00%
Debt Securities And Debt-Like [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan asset allocation	33.00%	37.00%
International Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan asset allocation	33.00%
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan asset allocation	5.00%	12.00%