RETIREMENT BENEFITS (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Nov. 29, 2011	May 31, 2011	Nov. 29, 2011 Pension Plans, Defined Benefit [Member]	Nov. 30, 2010 Pension Plans, Defined Benefit [Member]	Nov. 29, 2011 Pension Plans, Defined Benefit [Member]	Nov. 30, 2010 Pension Plans, Defined Benefit [Member]	Nov. 29, 2011 Postretirement Medical and Life Benefits [Member]	Nov. 30, 2010 Postretirement Medical and Life Benefits [Member]	Nov. 29, 2011 Postretirement Medical and Life Benefits [Member]	Nov. 30, 2010 Postretirement Medical and Life Benefits [Member]
RETIREMENT BENEFITS [Abstract]
Defined benefit pension plans	3
Estimated contributions to be made in remainder of fiscal year	$ 400,000
Lump sum pension payment accrued liability for CEO	8,100,000
Defined Benefit Plan Disclosure [Line Items]
Service cost			134,000	129,000	268,000	258,000	2,000	2,000	4,000	4,000
Interest cost			576,000	573,000	1,152,000	1,146,000	18,000	19,000	36,000	38,000
Expected return on plan assets			(126,000)	(98,000)	(252,000)	(196,000)
Amortization of prior service cost			64,000	82,000	128,000	164,000	(14,000)	(15,000)	(28,000)	(30,000)
Recognized actuarial loss			426,000	398,000	852,000	796,000	34,000	28,000	68,000	56,000
Net periodic benefit cost			$ 1,074,000	$ 1,084,000	$ 2,148,000	$ 2,168,000	$ 40,000	$ 34,000	$ 80,000	$ 68,000
Time following retirement before payment is to be made (in months)	6M
Defined contribution plans		2