LONG-TERM DEBT AND REVOLVING CREDIT FACILITY (Net Interest Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 30, 2015	Aug. 24, 2014
Debt Disclosure [Abstract]
Long-term debt	$ 82.3	$ 85.1
Short-term debt	0.2	0.5
Interest income	(0.2)	(0.5)
Interest capitalized	(2.0)	(1.8)
Interest expense, net	$ 80.3	$ 83.3