Revenue and Contract Balances - Summary of Contract Liabilities/Assets (Details) - USD ($) $ in Thousands	Mar. 30, 2025	Sep. 29, 2024
Disaggregation of Revenue [Line Items]
Contract assets	$ 134,106	$ 129,678
Contract liabilities - current	(373,591)	(351,738)
Contract liabilities - non-current	(7,772)	0
Net contract liabilities	(247,257)	(222,060)
Contract Retentions
Disaggregation of Revenue [Line Items]
Contract assets	$ 9,500	$ 7,900