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Financial Instruments and Risk Management, Offsetting Derivative Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2013
Sep. 28, 2013
Liability Derivatives [Abstracts]    
Gross amounts $ 9,111 $ 6,034
Effects of netting (4,664) (3,176)
Net amounts presented in the balance sheet 4,447 2,858
Cash collateral 1,272 0
Commodity-Related Derivatives [Member]
   
Liability Derivatives [Abstracts]    
Gross amounts 4,253 802
Effects of netting (2,047) (372)
Net amounts presented in the balance sheet 2,206 430
Interest Rate Swaps [Member]
   
Liability Derivatives [Abstracts]    
Gross amounts 4,858 5,232
Effects of netting (2,617) (2,804)
Net amounts presented in the balance sheet $ 2,241 $ 2,428