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		6 Months Ended
	Nov. 24, 2013	Nov. 25, 2012	Nov. 24, 2013	Nov. 25, 2012
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net			$ (29.8)
Commodity contracts
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	(11.1)	(12.0)	(28.6)	108.2
Commodity contracts | Consumer Foods
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	(0.6)	6.1	1.3	2.9
Commodity contracts | Commercial Foods
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	(0.8)	(2.1)	1.2	(8.2)
Commodity contracts | Private Brands
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	(0.6)	0.1	(1.3)	(0.6)
Operating Segments [Member] | Commodity contracts
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	(2.0)	4.1	1.2	(5.9)
Segment Reconciling Items | Commodity contracts
Operating Statistics [Line Items]
Derivative gain (loss) on derivative, net	$ (9.1)	$ (16.1)	$ (29.8)	$ 114.1