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. 24, 2013	Feb. 26, 2012	Feb. 24, 2013	Feb. 26, 2012
Operating Statistics [Line Items]
Net derivative gains (losses) incurred	$ (12.2)	$ 22.9	$ 96.0	$ (9.7)
Net derivative gains (losses) allocated to reporting segments	14.7	0.9	8.8	29.0
Net derivative gains (losses) recognized in general corporate expenses	(26.9)	22.0	87.2	(38.7)
Consumer Foods [Member]
Operating Statistics [Line Items]
Net derivative gains (losses) allocated to reporting segments	14.0	2.7	16.3	27.5
Commercial Foods [Member]
Operating Statistics [Line Items]
Net derivative gains (losses) allocated to reporting segments	$ 0.7	$ (1.8)	$ (7.5)	$ 1.5