Income Taxes (Schedule Of Tax Effects Of Temporary Differences That Generated Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Oct. 01, 2016
Income Tax Disclosure [Abstract]
Benefit accruals	$ 204,017	$ 237,261
Inventory reserves	33,879	33,950
Tax benefit carryforwards	9,598	17,349
Contract loss reserves not currently deductible	15,994	10,931
Other accrued expenses	17,689	17,669
Total gross deferred tax assets	281,177	317,160
Less valuation allowance	(4,775)	(10,938)
Total net deferred tax assets	276,402	306,222
Differences in bases and depreciation of property, plant and equipment	169,562	163,977
Pension	93,602	77,471
Total gross deferred tax liabilities	263,164	241,448
Net deferred tax assets	$ 13,238	$ 64,774