VARIABLE INTEREST ENTITIES (Narrative) (Details) - USD ($)	12 Months Ended
	May. 31, 2015	May. 25, 2014
Lamb Weston BSW
Variable Interest Entity [Line Items]
Basis points borrowing under the lines of credit	2.00%
Acquisition of equity interest in Lamb Weston	49.99%
Price at which Ochoa has the right to put its equity interest	$ 41,600,000
Balance of promissory note due from joint venture	$ 36,100,000
Interest rate	3.25%
Line of credit with Lamb Weston BSW, maximum borrowing capacity	$ 15,000,000
Lamb Weston RDO
Variable Interest Entity [Line Items]
Acquisition of equity interest in Lamb Weston	50.00%
Investment in Lamb Weston, maximum exposure	$ 14,600,000	$ 12,600,000
Owners' equity in capital structure of variable interest entity	29,200,000
Term borrowings from banks in capital structure of Lamb Weston, RDO	$ 41,600,000