Income Taxes (Schedule Of Tax Effects Of Temporary Differences That Generated Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Benefit accruals	$ 125,566	$ 204,017
Inventory reserves	27,678	33,879
Tax benefit carryforwards	16,211	9,598
Contract loss reserves not currently deductible	11,028	15,994
Other accrued expenses	6,670	17,689
Total gross deferred tax assets	187,153	281,177
Less valuation allowance	(15,181)	(4,775)
Total net deferred tax assets	171,972	276,402
Differences in bases and depreciation of property, plant and equipment	125,132	169,562
Pension	75,989	93,602
Total gross deferred tax liabilities	201,121	263,164
Net deferred tax assets		$ 13,238
Net deferred tax liabilities	$ (29,149)