BUSINESS SEGMENTS AND RELATED INFORMATION (Allocation of Net Derivative Gains (Losses) from Economic Hedges of Forecasted Commodity Consumption and Foreign Currency Risk) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 24, 2014	Aug. 25, 2013
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 38.3
Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(38.3)	(18.1)
Commodity contracts | Consumer Foods
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	3.7	1.9
Commodity contracts | Commercial Foods
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	3.1	1.7
Commodity contracts | Private Brands
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5.2	(0.8)
Operating Segments | Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	12.0	2.8
Segment Reconciling Items | Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (50.3)	$ (20.9)