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Derivatives and Hedging - Outstanding Contracts (Details)
item in Millions, bu in Millions, $ in Millions
12 Months Ended
Oct. 30, 2016
USD ($)
item
T
bu
Oct. 25, 2015
USD ($)
item
T
bu
Derivatives and Hedging    
Maximum number of upcoming fiscal years to hedge grain or natural gas exposure 2 years  
Accumulated change, pretax, in accumulated gains from derivative instruments designated and qualifying as the effective portion of cash flow hedges | $ $ 9.2 $ 1.0
Period over which majority of hedging gains is expected to be recognized 12 months  
Corn | Derivatives not designated as hedges    
Derivatives and Hedging    
Futures contracts, volume (in million bushels) 4.0 2.6
Corn | Cash Flow Hedges    
Derivatives and Hedging    
Futures contracts, volume (in million bushels) 22.4 20.1
Corn | Fair Value Hedges    
Derivatives and Hedging    
Futures contracts, volume (in million bushels) 3.6 5.3
Lean hogs | Fair Value Hedges    
Derivatives and Hedging    
Futures contracts, volume ( in centum weight) | item 0.2 0.4
Soybean meal | Derivatives not designated as hedges    
Derivatives and Hedging    
Futures contracts, volume (in tons) | T 11,000 11,500