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HOG PRODUCTION COST SAVINGS INITIATIVE (Details) (Hog Production Segment [Member], USD $)
In Millions
 3 Months Ended 18 Months Ended
Jul. 31, 2011
Jul. 31, 2011
May 01, 2011
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Period Expense $ 1.1    
Restructuring and Related Cost, Cost Incurred to Date   38.2  
Estimated Remaining Restructuring and Related Costs 5.2 5.2  
Cost Savings Activities [Domain]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0.8 0.8 2.4
Restructuring Reserve, Period Expense 1.0    
Restructuring Reserve, Settled with Cash (2.6)    
Restructuring and Related Cost, Cost Incurred to Date   30.1  
Estimated Remaining Restructuring and Related Costs 4.9 4.9  
Contract Termination [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0.6 0.6 0.8
Restructuring Reserve, Period Expense 0.1    
Restructuring Reserve, Settled with Cash (0.3)    
Restructuring and Related Cost, Cost Incurred to Date   22.3  
Estimated Remaining Restructuring and Related Costs 3.3 3.3  
Other Costs Associated with Restructuring and Related Activities [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve 0.2 0.2 1.6
Restructuring Reserve, Period Expense 0.9    
Restructuring Reserve, Settled with Cash (2.3)    
Restructuring and Related Cost, Cost Incurred to Date   7.8  
Estimated Remaining Restructuring and Related Costs 1.6 1.6  
Other Cost Savings Charges [Domain]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Period Expense 0.1    
Restructuring and Related Cost, Cost Incurred to Date   8.1  
Estimated Remaining Restructuring and Related Costs 0.3 0.3  
Accelerated Depreciation Associated with Restructuring and Related Activities [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Period Expense 0.1    
Restructuring and Related Cost, Cost Incurred to Date   5.6  
Estimated Remaining Restructuring and Related Costs 0.3 0.3  
Impairment Charges Associated with Restructuring and Related Activities [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Period Expense 0    
Restructuring and Related Cost, Cost Incurred to Date   2.5  
Estimated Remaining Restructuring and Related Costs $ 0 $ 0