PENSION AND POSTRETIREMENT BENEFITS (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Feb. 23, 2014	Feb. 23, 2014
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions to pension plan and other postretirement plan	$ 3.6	$ 13.7
Further contribution to pension and other postretirement plan		3.6
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions to pension plan and other postretirement plan	4.6	15.1
Further contribution to pension and other postretirement plan		$ 10.9