Defined Benefit Pension Plans - Weighted-Average Assumptions (Details)	12 Months Ended
	Sep. 24, 2023	Sep. 25, 2022	Sep. 26, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest crediting rate	2.50%	2.50%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.70%	5.30%
Discount rate - service cost	5.80%	5.40%	3.00%
Discount rate - interest cost	5.70%	5.30%	1.90%
Expected long-term return on plan assets	5.00%	5.00%	5.90%