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Financial Instruments and Risk Management, Offsetting Derivative Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 28, 2014
Sep. 28, 2013
Liability Derivatives [Abstracts]    
Gross amounts $ 5,850 $ 6,034
Effects of netting (3,348) (3,176)
Net amounts presented in the balance sheet 2,502 2,858
Cash collateral 958 0
Commodity-Related Derivatives [Member]
   
Liability Derivatives [Abstracts]    
Gross amounts 1,788 802
Effects of netting (1,354) (372)
Net amounts presented in the balance sheet 434 430
Interest Rate Swaps [Member]
   
Liability Derivatives [Abstracts]    
Gross amounts 4,062 5,232
Effects of netting (1,994) (2,804)
Net amounts presented in the balance sheet $ 2,068 $ 2,428