Revenue and Contract Balances - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Oct. 01, 2023
Revenue from Contract with Customer [Abstract]
Contract liability revenue recognized during the period	$ 251,000	$ 247,000
Net favorable operating income adjustments	46,400	29,800	$ 11,000
Liabilities for anticipated losses	13,500	15,100
Estimated cost to complete the related contracts	$ 78,000	$ 101,000
Period for billing and collecting unbilled receivables	12 months
Remaining unsatisfied performance obligation	$ 4,101,127
Remaining performance obligation, termination notice period one	30 days
Remaining performance obligation, termination notice period two	60 years
Remaining performance obligation, termination notice period three	90 days