Employee Benefit Plans - Schedule of Measurement of Partnership's Pension Plan Assets by Category (Details) - Pension Benefits [Member] - USD ($) $ in Thousands		Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Fair value of plan assets		$ 51,340	$ 55,091	$ 77,892
Short-term investments [Member]
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Fair value of plan assets	[1]	1,474	1,410
Domestic equity securities [Member]
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Fair value of plan assets	[1],[2]	2,766	2,803
International equity securities [Member]
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Fair value of plan assets		4,781	4,941
Fixed income securities [Member]
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items]
Fair value of plan assets	[1],[3]	$ 42,319	$ 45,937

[1] Includes funds which are not publicly traded and are valued at the net asset value of the units provided by the fund issuer.

[2] Includes funds which invest primarily in a diversified portfolio of publicly traded U.S. and Non-U.S. common stock.

[3] Includes funds which invest primarily in publicly traded and non-publicly traded, investment grade corporate bonds, U.S. government bonds and asset-backed securities.