Unit-Based Compensation Arrangements - Summary of Activity In the Restricted Units Plans (Details) - 2009 Restricted Unit Plan [Member] - $ / shares		12 Months Ended
		Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Units [Rollforward]
Outstanding, beginning of period (in units)		621,045	654,120	627,399
Awarded (in units)		424,431	323,715	307,559
Forfeited (in units)		(14,092)	(6,737)	(12,057)
Vested (in units)	[1]	(335,253)	(350,053)	(268,781)
Outstanding, end of period (in units)		696,131	621,045	654,120
Weighted Average Grant Date Fair Value Per Unit [Abstract]
Outstanding, beginning of period (in dollars per unit)		$ 22.10	$ 26.74	$ 31.87
Awarded (in dollars per unit)		19.52	21.00	23.62
Forfeited (in dollars per unit)		(19.70)	(23.51)	(25.44)
Vested (in dollars per unit)	[1]	(24.39)	(29.74)	(35.19)
Outstanding, end of period (in dollars per unit)		$ 19.47	$ 22.10	$ 26.74

[1] During fiscal 2018, 2017 and 2016, the Partnership withheld 34,388, 34,883 and 10,477 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.