DERIVATIVE FINANCIAL INSTRUMENTS - Gains (Losses) from Derivatives not Designated as Hedging Instruments (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended
	Aug. 27, 2017	Aug. 28, 2016
Derivative Instruments, Gain (Loss)
Amount of Gain or (Loss) Recognized on Derivative	$ 3.2	$ 0.5
Commodity contracts | Other
Derivative Instruments, Gain (Loss)
Amount of Gain or (Loss) Recognized on Derivative	3.5	0.3
Commodity contracts | Reportable segments
Derivative Instruments, Gain (Loss)
Amount of Gain or (Loss) Recognized on Derivative	(0.3)	0.2
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss)
Amount of Gain or (Loss) Recognized on Derivative	$ 3.2	$ 0.5