Postretirement and Postemployment Benefits - Assumptions (Details) - Other Postretirement Benefits Plan	12 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 27, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	5.30%	2.60%
Expected long-term return on plan assets	5.00%	4.00%
Discount rate - service cost	5.50%	2.50%	3.40%
Discount rate - interest cost	5.10%	1.90%	2.80%
Expected long-term return on plan assets	5.00%	4.00%	4.50%