Investments in and Acquisitions and Dispositions of Businesses - Summary of Acquisition and Purchase Price Allocation (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
North Carolina [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid	[1]			$ 9,813
New Mexico [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid	[2]		$ 26,707
Washington [Member]
Business Acquisition [Line Items]
Business acquisition, cost of acquired, cash paid	[3]	$ 19,651

[1] Includes one acquisition of a propane retailer located in North Carolina

[2] Includes one acquisition of a propane retailer located in New Mexico

[3] Includes one acquisition of a propane retailer located in Washington