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Income Taxes (Schedule Of Tax Effects Of Temporary Differences That Generated Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Sep. 28, 2024 | Sep. 30, 2023
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Income Tax Disclosure [Abstract] |  |
Research and development | $ 64,530 | $ 41,118
Benefit accruals | 54,667 | 59,738
Inventory reserves | 28,796 | 28,301
Tax benefit carryforwards | 18,034 | 7,897
Contract reserves not currently deductible | 15,898 | 10,467
Lease liability | 16,063 | 16,342
Other accrued expenses | 2,835 | 6,212
Total gross deferred tax assets | 200,823 | 170,075
Less valuation allowance | (10,905) | (6,430)
Total net deferred tax assets | 189,918 | 163,645
Differences in bases and depreciation of property, plant and equipment | 178,868 | 170,284
Pension | 17,797 | 22,238
Total gross deferred tax liabilities | 196,665 | 192,522
Net deferred tax liabilities | $ (6,747) | $ (28,877)

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