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Derivatives and Hedging - Outstanding Contracts (Details)
item in Millions, bu in Millions, $ in Millions
12 Months Ended
Oct. 29, 2017
USD ($)
item
bu
Oct. 30, 2016
USD ($)
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 | $ $ 1.8 $ 9.2
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
Corn | Cash Flow Hedges    
Derivatives and Hedging    
Futures contracts, volume (in million bushels) 11.5 22.4
Corn | Fair Value Hedges    
Derivatives and Hedging    
Futures contracts, volume (in million bushels) 4.1 3.6
Lean hogs | Cash Flow Hedges    
Derivatives and Hedging    
Futures contracts, volume ( in centum weight) | item 0.3  
Lean hogs | Fair Value Hedges    
Derivatives and Hedging    
Futures contracts, volume ( in centum weight) | item 0.4 0.2
Soybean meal | Derivatives not designated as hedges    
Derivatives and Hedging    
Futures contracts, volume (in tons) | T   11,000