Investments in and Acquisitions of Businesses - schedule of condensed consolidated balance sheets (Details) - USD ($) $ in Thousands	Jun. 24, 2023	Dec. 28, 2022	Sep. 24, 2022
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill	$ 1,148,776		$ 1,113,423
RNG Projects [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and cash equivalents		$ 1,560
Accounts receivable		4,150
Other current assets		178
Current assets acquired		5,888
Property, plant & equipment		91,490
Other intangibles		48,024
Goodwill		48,024
Goodwill		31,759
Other assets		13,372
Total assets acquired		190,533
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable		(6,122)
Other current liabilities		(1,969)
Long-term debt		(65,776)
Other noncurrent liabilities		(6,318)
Total liabilities assumed		(80,185)
Total net assets acquired		$ 110,348