Pension, Postretirement and Postemployment Defined Benefit Plans - Narrative (Details) - USD ($)	9 Months Ended
	Jun. 25, 2023	Jun. 26, 2022	Sep. 25, 2022
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plans, withdrawal obligation	$ 23,100,000		$ 25,000,000
Multiemployer plans, withdrawal obligation, period (years)	20 years
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, contributions by employer	$ 0	$ 0
Defined benefit plan, expected future employer contributions, next fiscal year	$ 0