Indebtedness (Components of Long-term debt) (Details) - USD ($) $ in Thousands	Mar. 28, 2026	Sep. 27, 2025
Debt Instrument
Senior debt	$ 1,251,000	$ 946,000
Less deferred debt issuance cost	(11,175)	(314)
Long-Term Debt, Current Maturities	(500,000)	(1,563)
Long-term debt	739,825	944,123
Line of Credit | Revolving loan (Credit facility)
Debt Instrument
Senior debt	0	195,000
Line of Credit | Revolving loan (SECT)
Debt Instrument
Senior debt	1,000	1,000
Term Loan
Debt Instrument
Senior debt	250,000	250,000
Senior Notes | Senior Notes 5.50%
Debt Instrument
Senior debt	500,000	0
Senior Notes | Senior notes 4.25%
Debt Instrument
Senior debt	$ 500,000	$ 500,000