Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Class B Common Stock
Defined Benefit Plan Disclosure
Number of shares owned by the participants under RSP (in shares)	1,778,645
Pension Plan
Defined Benefit Plan Disclosure
Total accumulated benefit obligation	$ 676,061	$ 687,292
Fair value of assets at measurement date	579,818
Trust for Unqualified Plan
Defined Benefit Plan Disclosure
Estimated future employer contributions in next fiscal year	5,700
Postretirement Benefit Plan
Defined Benefit Plan Disclosure
Plan assets	$ 0
Discount rate	4.70%	4.50%	5.60%
Service cost discount rate	4.30%	5.40%	5.10%
Interest cost discount rate	4.40%	5.70%	5.10%
Assumed annual per capita rate of increase of medical and drug costs for next fiscal year	8.00%
Medical and drug cost - ultimate trend rate	4.50%
Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2035
U.S. Plans | Pension Plan
Defined Benefit Plan Disclosure
Fair value of assets at measurement date	$ 477,482	$ 472,633	$ 392,444
Assumptions for pension expense, average rate of return on plan assets	7.30%	7.30%	6.50%
Plan assets	$ 0	$ 0
Discount rate	5.50%	5.00%	5.90%
Service cost discount rate	5.10%	6.00%	5.50%
Interest cost discount rate	4.80%	5.80%	5.40%
U.S. Plans | Equity securities | Pension Plan
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	49.00%	41.00%
U.S. Plans | Fixed income securities | Pension Plan
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	51.00%	59.00%
Non-U.S. Plans | Pension Plan
Defined Benefit Plan Disclosure
Fair value of assets at measurement date	$ 102,336	$ 113,776	$ 97,184
Assumptions for pension expense, average rate of return on plan assets	4.20%	4.40%	4.30%
Estimated future employer contributions in next fiscal year	$ 4,500
Plan assets	$ 15,254	$ 15,640
Discount rate	4.80%	4.10%	4.70%
Service cost discount rate	2.90%	4.70%	4.50%
Interest cost discount rate	4.00%	4.60%	4.50%
Non-U.S. Plans | Equity securities | Pension Plan
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	24.00%	26.00%
Non-U.S. Plans | Fixed income securities | Pension Plan
Defined Benefit Plan Disclosure
Actual Plan Asset Allocations	45.00%	43.00%
Profit Sharing
Defined Benefit Plan Disclosure
Profit share expense	$ 52,100	$ 46,424	$ 38,702