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		9 Months Ended
	Feb. 23, 2014	Feb. 24, 2013	Feb. 23, 2014	Feb. 24, 2013
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net			$ 14.3
Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	42.9	(12.2)	14.3	96.0
Commodity contracts | Consumer Foods
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(4.4)	11.9	(3.1)	14.8
Commodity contracts | Commercial Foods
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0.9	1.7	2.1	(6.5)
Commodity contracts | Private Brands
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(5.9)	1.1	(7.2)	0.5
Operating Segments [Member] | Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(9.4)	14.7	(8.2)	8.8
Segment Reconciling Items | Commodity contracts
Operating Statistics [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 52.3	$ (26.9)	$ 22.5	$ 87.2