Unit-Based Compensation Arrangements - Summary of Activity for the Restricted Units Plans (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013
Units [Rollforward]
Outstanding, beginning of period (in units)	694,927	527,627	442,851
Granted (in units)	154,403	256,273	200,933
Forfeited (in units)	(7,607)	(3,119)	(3,497)
Issued (in units)	(214,324)	(85,854)	(112,660)
Outstanding, end of period (in units)	627,399	694,927	527,627
Weighted Average Grant Date Fair Value Per Unit [Abstract]
Outstanding, beginning of period (in dollars per unit)	$ 32.07	$ 29.30	$ 32.68
Granted (in dollars per unit)	37.59	37.43	23.42
Forfeited (in dollars per unit)	(31.04)	(28.39)	(32.15)
Issued (in dollars per unit)	(36.68)	(31.23)	(32.01)
Outstanding, end of period (in dollars per unit)	$ 31.87	$ 32.07	$ 29.30