VARIABLE INTEREST ENTITIES (Narrative) (Details) - USD ($)	3 Months Ended
	Aug. 30, 2015	May. 31, 2015
Variable Interest Entity [Line Items]
Price at which Ochoa has the right to put its equity interest	$ 42,100,000
Balance of promissory note due from joint venture	$ 36,100,000
Stated interest rate (as a percent)	3.25%
Line of credit with Lamb Weston BSW, Maximum Borrowing Capacity	$ 15,000,000.0
LIBOR
Variable Interest Entity [Line Items]
Libor plus (as percent)	2.00%
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	$ 14,200,000	$ 14,600,000
Owners' equity in capital structure of variable interest entity	28,300,000
Term borrowings from banks in capital structure of Lamb Weston, RDO	41,600,000
Loss on lease put option
Variable Interest Entity [Line Items]
Estimate of possible loss	103,000,000
Accrued put cost	$ 5,700,000