Unit-Based Compensation Arrangements - Summary of Activity In the Restricted Units Plans (Details) - 2009 Restricted Unit Plan [Member] - $ / shares		12 Months Ended
		Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Units [Rollforward]
Outstanding, beginning of period (in units)		696,131	621,045	654,120
Awarded (in units)		618,268	424,431	323,715
Forfeited (in units)		(5,904)	(14,092)	(6,737)
Vested (in units)	[1]	(320,156)	(335,253)	(350,053)
Outstanding, end of period (in units)		988,339	696,131	621,045
Weighted Average Grant Date Fair Value Per Unit [Abstract]
Outstanding, beginning of period (in dollars per unit)		$ 19.47	$ 22.10	$ 26.74
Awarded (in dollars per unit)		18.13	19.52	21.00
Forfeited (in dollars per unit)		(18.34)	(19.70)	(23.51)
Vested (in dollars per unit)	[1]	(21.08)	(24.39)	(29.74)
Outstanding, end of period (in dollars per unit)		$ 18.12	$ 19.47	$ 22.10

[1] During fiscal 2019, 2018 and 2017, the Partnership withheld 59,227, 34,388 and 34,883 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.