Indebtedness (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2025	Jun. 28, 2025	Mar. 29, 2025	Dec. 28, 2024	Sep. 28, 2024	Jun. 29, 2024	Mar. 30, 2024	Dec. 30, 2023	Sep. 30, 2023
Debt Instrument
Pledged Assets, NBV	$ 4,426,055	$ 4,384,020	$ 4,307,055	$ 4,181,848	$ 4,077,647	$ 4,080,387	$ 4,041,682	$ 3,980,265	$ 3,768,347
Unused borrowing capacity	925,388
Line of Credit | U.S. revolving credit facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	1,100,000
Expansion option to increase credit facility	$ 400,000
Debt, Weighted Average Interest Rate	5.80%
Applicable margin in interest rate of revolving credit facility, basis points	1.60%
Unused borrowing capacity	$ 900,721
Line of Credit | SECT revolving credit facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	$ 25,000				$ 35,000
Applicable margin in interest rate of revolving credit facility, basis points	2.23%
Term Loan
Debt Instrument
Debt, Weighted Average Interest Rate	5.90%
Applicable margin in interest rate of revolving credit facility, basis points	1.60%
Debt Instrument, Face Amount	$ 250,000
Installment Payments - 2026	3,125
Installment Payments - 2027	9,375
Senior Notes | Senior notes 4.25%
Debt Instrument
Debt Instrument, Face Amount	$ 500,000
Debt Instrument, Interest Rate, Stated Percentage	4.25%
Debt Instrument, Interest Rate, Effective Percentage	4.60%
Asset Pledged as Collateral
Debt Instrument
Pledged Assets, NBV	$ 2,163,282