Revenue from Contracts with Customers (Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 28, 2026	Sep. 27, 2025
Revenue from Contract with Customer [Abstract]
Unbilled receivables	$ 842,157	$ 744,352
Contract advances and progress billings	469,206	372,988
Net contract assets	$ 372,951	$ 371,364

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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