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	Jan. 29, 2012	May 01, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	$ 21.1	$ 79.8
Foreign Currency Contract, Asset, Fair Value Disclosure	2.2	0.5
Cash Surrender Value, Fair Value Disclosure	46.5	49.4
Assets, Fair Value Disclosure	69.8	129.7
Commodity Contracts, Liability, Fair Value Disclosure	8.4	16.8
Interest Rate Contracts, Liability, Fair Value Disclosure	0	2.3
Foreign Currency Contracts, Liability, Fair Value Disclosure	4.2	1.9
Liabilities, Fair Value Disclosure	12.6	21.0
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	18.4	45.2
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Cash Surrender Value, Fair Value Disclosure	46.5	49.4
Assets, Fair Value Disclosure	64.9	94.6
Commodity Contracts, Liability, Fair Value Disclosure	0	16.8
Interest Rate Contracts, Liability, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	16.8
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	2.7	34.6
Foreign Currency Contract, Asset, Fair Value Disclosure	2.2	0.5
Cash Surrender Value, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	4.9	35.1
Commodity Contracts, Liability, Fair Value Disclosure	8.4	0
Interest Rate Contracts, Liability, Fair Value Disclosure	0	2.3
Foreign Currency Contracts, Liability, Fair Value Disclosure	4.2	1.9
Liabilities, Fair Value Disclosure	12.6	4.2
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
Cash Surrender Value, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	0	0
Commodity Contracts, Liability, Fair Value Disclosure	0	0
Interest Rate Contracts, Liability, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	$ 0	$ 0