Income Taxes (Schedule Of Tax Effects Of Temporary Differences That Generated Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019
Income Tax Disclosure [Abstract]
Benefit accruals	$ 78,703	$ 114,077
Inventory reserves	31,571	26,364
Tax benefit carryforwards	14,146	14,196
Contract reserves not currently deductible	16,418	15,382
Lease liability	17,622	0
Other accrued expenses	12,510	4,918
Total gross deferred tax assets	170,970	174,937
Less valuation allowance	(14,784)	(13,137)
Total net deferred tax assets	156,186	161,800
Differences in bases and depreciation of property, plant and equipment	152,926	121,353
Pension	24,810	60,983
Total gross deferred tax liabilities	177,736	182,336
Net deferred tax liabilities	$ (21,550)	$ (20,536)