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Operating Leases (Details) (USD $)
In Millions
12 Months Ended
May 29, 2011
May 30, 2010
May 31, 2009
Summary of noncancelable operating lease      
2012 $ 65.5    
2013 56.2    
2014 46.7    
2015 38.1    
2016 28.5    
Later years 132.0    
Total noncancelable operating lease 367.0    
Operating Leases (Textuals) [Abstract]      
Sale of farm land in acres   17600 acres  
Proceeds in cash from sale of farmland   75.0  
Deferred gain from sale of farmland   29.7  
Initial term of lease agreement and Renewal options   P10Y  
Renewal options 5 years    
Segment, Continuing Operations [Member]
     
Operating Leases (Textuals) [Abstract]      
Rent expense from operations 126.1 127.2 134.3
Segment, Discontinued Operations [Member]
     
Operating Leases (Textuals) [Abstract]      
Rent expense from operations $ 0.4 $ 3.2 $ 5.9