FAIR VALUE MEASUREMENTS Schedule of Fair Value, Assets and Liabilities Measured on a Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Apr. 28, 2013	Apr. 29, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	$ 6.8	$ 53.3
Foreign Currency Contract, Asset, Fair Value Disclosure	0.8	4.3
Open-Ended Mutual Funds, Asset Fair Value Disclosure	6.4	12.2
Cash Surrender Value, Fair Value Disclosure	60.0	51.3
Assets, Fair Value Disclosure	74.0	121.1
Commodity Contracts, Liability, Fair Value Disclosure	67.6	8.6
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.4	0.7
Liabilities, Fair Value Disclosure	68.0	9.3
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	6.8	52.0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Open-Ended Mutual Funds, Asset Fair Value Disclosure	6.4	12.2
Cash Surrender Value, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	13.2	64.2
Commodity Contracts, Liability, Fair Value Disclosure	30.5	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	30.5	0
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	1.3
Foreign Currency Contract, Asset, Fair Value Disclosure	0.8	4.3
Open-Ended Mutual Funds, Asset Fair Value Disclosure	0	0
Cash Surrender Value, Fair Value Disclosure	60.0	51.3
Assets, Fair Value Disclosure	60.8	56.9
Commodity Contracts, Liability, Fair Value Disclosure	37.1	8.6
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.4	0.7
Liabilities, Fair Value Disclosure	37.5	9.3
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