DERIVATIVES FINANCIAL INSTRUMENTS Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 29, 2012	May 01, 2011	May 02, 2010
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 4.6
Derivative, Collateral, Obligation to Return Cash	14.1
Credit Exposure on Non-Exchange Traded Derivative Contracts, Excluding the Effects of Netting Arrangements	10.6
Gain on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring	12.0
Accumulated other comprehensive income (loss), Hedge accounting	51.2	48.1
Tax On Deferred Gains (Losses) in Accumulated Other Comprehensive Income (Loss)	(32.0)
Gains (Losses) on Derivative Contracts Representing the Differences Between Spot and Futures Prices Which are Excluded from the Assessment of Effectiveness and Recorded Directly Into Earnings	5.1	0.2	(4.4)
Gains (Losses) Recognized on Closed Commodity Derivative Contracts As the Underlying Cash Transactions Affected Earnings	6.0	(24.9)	(3.1)
Scenario, Forecast [Member] | Commodity Contract [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	37.6
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax	$ 23.0