Inventories (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Mar. 28, 2026	Sep. 27, 2025
Inventory Disclosure [Abstract]
Raw materials and purchased parts	$ 341,992	$ 301,679
Work in progress	495,583	520,315
Finished goods	94,229	92,308
Inventories, net	$ 931,804	$ 914,302

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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