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Derivatives and Hedging - Outstanding Contracts (Details)
cwt in Millions, $ in Millions
12 Months Ended
Oct. 28, 2018
USD ($)
cwt
bu
Oct. 29, 2017
USD ($)
cwt
bu
Derivatives and Hedging    
Accumulated change, pretax, in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges | $ $ (1.4) $ 1.8
Period over which majority of hedging gains is expected to be recognized 12 months  
Corn    
Derivatives and Hedging    
Maximum number of upcoming fiscal years to hedge grain or natural gas exposure 2 years  
Corn | Derivatives not designated as hedges    
Derivatives and Hedging    
Future contracts, volume (in million bushels) 0 0
Corn | Cash Flow Hedges    
Derivatives and Hedging    
Future contracts, volume (in million bushels) 16,800,000 11,500,000
Corn | Fair Value Hedges    
Derivatives and Hedging    
Future contracts, volume (in million bushels) 6,200,000 4,100,000
Lean hogs    
Derivatives and Hedging    
Maximum number of upcoming fiscal years to hedge grain or natural gas exposure 12 months  
Lean hogs | Cash Flow Hedges    
Derivatives and Hedging    
Futures contracts, volume ( in centum weight) | cwt 0.4 0.3
Lean hogs | Fair Value Hedges    
Derivatives and Hedging    
Futures contracts, volume ( in centum weight) | cwt 0.2 0.4