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Investments in and Acquisitions and Dispositions of Businesses Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 28, 2022	Feb. 17, 2022	Mar. 26, 2022	Sep. 28, 2024	Sep. 30, 2023	Sep. 24, 2022
Business Acquisition [Line Items]
Cash paid to acquire business				$ 25,152	$ 130,124	$ 56,083
Weighted average useful lives				12 years
Goodwill, Measurement Period Adjustment				$ 500
Business Combination, Acquisition Related Costs				0	4,695
Proceeds from sale of business				$ 0	$ 0	$ 850
Customer Relationships [Member] \| Sph All Other [Member]
Business Acquisition [Line Items]
Fair value of intangible assets	$ 42,924
Favorable Supply Contracts [Member] \| Sph All Other [Member]
Business Acquisition [Line Items]
Fair value of intangible assets	5,100
Propane and Propane Retailer [Member]
Business Acquisition [Line Items]
Proceeds from sale of business		$ 850
Gain on sale of assets			$ 363
Oberon
Business Acquisition [Line Items]
Percentage of equity interest				38.00%
Independence Hydrogen, Inc.
Business Acquisition [Line Items]
Percentage of equity interest				25.00%
RNG assets
Business Acquisition [Line Items]
Cash paid to acquire business	$ 190,000