Defined Benefit Pension Plans - Benefit Obligations and Plan Assets (Details) - Pension Plan - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 25, 2022	Sep. 25, 2022	Sep. 26, 2021	Sep. 27, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year		$ 384,187	$ 401,381
Service cost		467	2,529	$ 1,361
Interest cost		7,941	7,147	7,577
Plan Amendments		6,077	0
Actuarial (gain) loss		(85,754)	(5,413)
Benefits paid		(21,686)	(21,182)
Liability (gain)/loss due to curtailment		(1,027)	0
Settlements	$ (81,377)	(81,377)	0
Administrative expenses paid		0	(275)
Benefit obligation, end of year	208,828	208,828	384,187	401,381
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year:		398,430	331,354
Actual return on plan assets		(84,000)	89,892
Benefits paid		(21,686)	(21,182)
Administrative expenses paid		(2,123)	(2,599)
Settlements		(81,377)	0
Employer contributions		112	965
Fair value of plan assets, end of year	209,356	209,356	398,430	$ 331,354
Funded status	$ 528	$ 528	$ 14,243