Revenue and Contract Balances - Summary of Contract Liabilities/Assets (Details) - USD ($) $ in Thousands	Jun. 29, 2025	Sep. 29, 2024
Disaggregation of Revenue [Line Items]
Contract assets	$ 142,852	$ 129,678
Contract liabilities - current	(389,856)	(351,738)
Contract liabilities - non-current	(6,687)	0
Net contract liabilities	(253,691)	(222,060)
Contract Retentions
Disaggregation of Revenue [Line Items]
Contract assets	$ 11,700	$ 7,900