Financial Instruments and Risk Management - Fair Value of the Partnership's Senior Notes (Details) - USD ($) $ in Thousands	Jun. 25, 2016	Sep. 26, 2015
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	$ 1,130,273	$ 1,103,922
7.375% Senior Notes due August 1, 2021 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	360,460	363,922
5.5% Senior Notes due June 1, 2024 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	521,063	498,750
5.75% Senior Notes due March 1, 2025 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	$ 248,750	$ 241,250