BUSINESS SEGMENTS AND RELATED INFORMATION - Schedule of Net Derivative Gains (Losses) from Economic Hedges of Forecasted Commodity Consumption and Foreign Currency Risk (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 27, 2017	Aug. 28, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	$ (6.8)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	(7.4)	$ (0.3)
Commodity contracts | Reporting segments
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	(1.4)	(1.0)
Commodity contracts | Reporting segments | Net derivative losses allocated to Grocery & Snacks
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	(0.6)	(0.4)
Commodity contracts | Reporting segments | Net derivative losses allocated to Refrigerated & Frozen
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	0.0	(0.2)
Commodity contracts | Reporting segments | Net derivative losses allocated to International
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	(0.7)	0.0
Commodity contracts | Reporting segments | Net derivative losses allocated to Foodservice
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	(0.1)	(0.3)
Commodity contracts | Reporting segments | Net derivative losses allocated to Commercial
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	0.0	(0.1)
Commodity contracts | Net derivative gains (losses) recognized in general corporate expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative losses incurred	$ (6.0)	$ 0.7