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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
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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)

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