Pension and Other Post Retirement Benefit Plans - Schedule of Amount Recognized in Accompanying Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 26, 2025	Sep. 27, 2024
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost included in noncurrent liabilities	$ 272,069	$ 298,221
Pension Plan | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Prepaid benefit cost included in noncurrent assets	0	0
Accrued benefit cost included in current liabilities	90	90
Accrued benefit cost included in noncurrent liabilities	4,628	2,828
Net amount recognized at the end of the year	4,718	2,918
Pension Plan | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Prepaid benefit cost included in noncurrent assets	65,792	62,056
Accrued benefit cost included in current liabilities	7,057	6,833
Accrued benefit cost included in noncurrent liabilities	95,484	134,501
Net amount recognized at the end of the year	$ 36,749	$ 79,278