Defined Benefit Pension Plans - Weighted-Average Assumptions (Details)	12 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 27, 2020
Defined Benefit Plan Disclosure [Line Items]
Interest crediting rate	2.50%	2.50%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.30%	2.70%
Discount rate - service cost	5.40%	3.00%	3.30%
Discount rate - interest cost	5.30%	1.90%	2.60%
Expected long-term return on plan assets	5.00%	5.90%	6.00%