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Revenue from Contracts with Customers Revenue from Contracts with Customers (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2026	Mar. 29, 2025	Mar. 28, 2026	Mar. 29, 2025	Sep. 27, 2025
Disaggregation of Revenue [Line Items]
Revenue for adjustments made to performance obligations satisfied in previous periods	$ 14,718	$ 2,604	$ 27,265	$ 11,274
Contract loss and contract-related loss reserves	81,217		81,217		$ 84,360
Revenue recognized due to contract liabilities	64,087		213,900
Remaining performance obligation, amount	$ 7,230,000		$ 7,230,000
Remaining performance obligation, percentage	46.00%		46.00%
Minimum
Disaggregation of Revenue [Line Items]
Payment terms - days			30
Maximum
Disaggregation of Revenue [Line Items]
Payment terms - days			60 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-03-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	12 months		12 months