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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 9 Months Ended
Jan. 27, 2013
Jan. 29, 2012
Jan. 27, 2013
Jan. 29, 2012
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Recognized in Income, Net $ 2.8 $ (11.8) $ 15.9 $ 18.1
Commodity Contract [Member] | Cost of Sales [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Recognized in Income, Net 3.0 (14.5) 11.9 10.8
Foreign Exchange Contract [Member] | Operating Expense [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative Instruments, Gain (Loss) Recognized in Income, Net $ (0.2) $ 2.7 $ 4.0 $ 7.3