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FAIR VALUE MEASUREMENTS Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Millions, unless otherwise specified
Jul. 28, 2013
Apr. 28, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Contracts, Asset, Fair Value Disclosure $ 0 $ 6.8
Foreign Currency Contract, Asset, Fair Value Disclosure 0.1 0.8
Open-Ended Mutual Funds, Asset Fair Value Disclosure 5.8 6.4
Cash Surrender Value, Fair Value Disclosure 61.5 60.0
Assets, Fair Value Disclosure 67.4 74.0
Commodity Contracts, Liability, Fair Value Disclosure 65.6 67.6
Foreign Currency Contracts, Liability, Fair Value Disclosure 1.5 0.4
Liabilities, Fair Value Disclosure 67.1 68.0
Fair Value, Inputs, Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Contracts, Asset, Fair Value Disclosure 0 6.8
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0
Open-Ended Mutual Funds, Asset Fair Value Disclosure 5.8 6.4
Cash Surrender Value, Fair Value Disclosure 0 0
Assets, Fair Value Disclosure 5.8 13.2
Commodity Contracts, Liability, Fair Value Disclosure 29.5 30.5
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0
Liabilities, Fair Value Disclosure 29.5 30.5
Fair Value, Inputs, Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Contracts, Asset, Fair Value Disclosure 0 0
Foreign Currency Contract, Asset, Fair Value Disclosure 0.1 0.8
Open-Ended Mutual Funds, Asset Fair Value Disclosure 0 0
Cash Surrender Value, Fair Value Disclosure 61.5 60.0
Assets, Fair Value Disclosure 61.6 60.8
Commodity Contracts, Liability, Fair Value Disclosure 36.1 37.1
Foreign Currency Contracts, Liability, Fair Value Disclosure 1.5 0.4
Liabilities, Fair Value Disclosure 37.6 37.5
Fair Value, Inputs, Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Contracts, Asset, Fair Value Disclosure 0 0
Foreign Currency Contract, Asset, Fair Value Disclosure 0 0
Open-Ended Mutual Funds, Asset Fair Value Disclosure 0 0
Cash Surrender Value, Fair Value Disclosure 0 0
Assets, Fair Value Disclosure 0 0
Commodity Contracts, Liability, Fair Value Disclosure 0 0
Foreign Currency Contracts, Liability, Fair Value Disclosure 0 0
Liabilities, Fair Value Disclosure $ 0 $ 0