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Derivative Instruments - Gross Contract Notional Volume of Outstanding Derivative Contracts (Detail) (Commodity contracts [Member])
Sep. 28, 2013
bu
Sep. 29, 2012
bu
Corn [Member]
    
Derivative [Line Items]    
Derivative commodity contract outstanding volume 0 400,000
Soy Meal [Member]
    
Derivative [Line Items]    
Derivative commodity contract outstanding mass 0 2,000