Revenue and Contract Balances - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Oct. 01, 2023
Revenue from Contract with Customer [Abstract]
Contract liability revenue recognized during the period	$ 130,000	$ 81,000
Net favorable (unfavorable) revenue and operating income adjustments	5,700	$ 3,500
Liabilities for anticipated losses	9,200		$ 8,500
Estimated cost to complete the related contracts	$ 68,000		$ 68,000
Period for billing and collecting unbilled receivables	12 months
Remaining unsatisfied performance obligation	$ 4,707,088
Remaining performance obligation, termination notice period one	30 days
Remaining performance obligation, termination notice period two	60 days
Remaining performance obligation, termination notice period three	90 days