LONG-TERM DEBT - Schedule of Net Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016	May 31, 2015
Debt Disclosure [Abstract]
Long-term debt	$ 203.6	$ 302.9	$ 333.0
Short-term debt	0.6	1.9	2.8
Interest income	(3.7)	(1.2)	(1.0)
Interest capitalized	(5.0)	(7.8)	(6.6)
Net interest expense	$ 195.5	$ 295.8	$ 328.2