LONG-TERM DEBT AND REVOLVING CREDIT FACILITY - Net Interest Expense from Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 28, 2016	Aug. 30, 2015
Debt Disclosure [Abstract]
Long-term debt	$ 61.5	$ 82.3
Short-term debt	0.5	0.2
Interest income	(0.8)	(0.2)
Interest capitalized	(2.2)	(2.0)
Interest expense, net	$ 59.0	$ 80.3