VARIABLE INTEREST ENTITIES (Narrative) (Details) (USD $)	12 Months Ended
	May 26, 2013	May 27, 2012
Variable Interest Entity [Line Items]
Basis points borrowing under the lines of credit	2.00%
Price at which Ochoa has the right to put its equity interest	$ 37,700,000
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	15,000,000.0
Lamb Weston BSW
Variable Interest Entity [Line Items]
Acquisition of equity interest in Lamb Weston	49.99%
Lamb Weston RDO
Variable Interest Entity [Line Items]
Acquisition of equity interest in Lamb Weston	50.00%
Investment in Lamb Weston, maximum exposure	15,200,000	14,800,000
Owners' equity in capital structure of variable interest entity	30,400,000
Term borrowings from banks in capital structure of Lamb Weston, RDO	$ 43,900,000