PENSION AND POSTRETIREMENT BENEFITS (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Feb. 24, 2013	Feb. 24, 2013
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions to pension plan and other postretirement plan	$ 4.6	$ 14.7
Further contribution to pension and other postretirement plan	4.2	4.2
Postretirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions to pension plan and other postretirement plan	6.9	20.0
Further contribution to pension and other postretirement plan	$ 6.5	$ 6.5