Unit-Based Compensation Arrangements - Summary of Activity In the Restricted Units Plans (Details) - 2018 Restricted Unit Plan [Member] - $ / shares		12 Months Ended
		Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Units [Rollforward]
Outstanding, beginning of period (in units)		1,100,278	1,366,362	1,516,229
Awarded (in units)		509,951	466,625	571,732
Forfeited (in units)		(25,368)	(1,470)	(15,552)
Vested (in units)	[1]	(657,440)	(731,239)	(706,047)
Outstanding, end of period (in units)		927,421	1,100,278	1,366,362
Weighted Average Grant Date Fair Value Per Unit [Abstract]
Outstanding, beginning of period (in dollars per unit)		$ 13.37	$ 12.94	$ 13.52
Awarded (in dollars per unit)		15.09	14.77	13.45
Forfeited (in dollars per unit)		(13.79)	(18.44)	(13.15)
Vested (in dollars per unit)	[1]	(13.3)	(13.47)	(14.59)
Outstanding, end of period (in dollars per unit)		$ 14.35	$ 13.37	$ 12.94

[1] During fiscal 2025, 2024 and 2023, the Partnership withheld 156,540, 180,787 and 171,840 Common Units, respectively, from participants for income tax withholding purposes for those executive officers of the Partnership whose shares of restricted units vested during the period.