Other Retirement Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 24, 2023	Sep. 25, 2022	Sep. 26, 2021
Multiemployer Plan [Line Items]
Defined contribution retirement plan costs	$ 3.5	$ 3.6	$ 3.4
Percentage of CBA's expiring in the next twelve months	55.00%
Minimum
Multiemployer Plan [Line Items]
Multiemployer plans, withdrawal obligation, period (year)	20 years
Warrants and Other Liabilities
Multiemployer Plan [Line Items]
Withdrawal liabilities	$ 25.1	$ 25.0