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DERIVATIVE FINANCIAL INSTRUMENTS Gains (Losses) Recognized in Earnings on Mark-to-Market Contracts (Details) (Not Designated as Hedging Instrument [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Jul. 29, 2012
Jul. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments, Gain (Loss) Recognized in Income, Net $ (3.6) $ 22.1
Commodity Contract [Member] | Cost of Sales [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments, Gain (Loss) Recognized in Income, Net (8.2) 20.8
Foreign Exchange Contract [Member] | Operating Expense [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Instruments, Gain (Loss) Recognized in Income, Net $ 4.6 $ 1.3