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. 28, 2016	Aug. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	$ 1.4
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	0.2	$ (9.3)
Commodity contracts | Reporting segments
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	(0.8)	(7.1)
Commodity contracts | Reporting segments | Net derivative losses allocated to Grocery & Snacks
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	(0.5)	(4.2)
Commodity contracts | Reporting segments | Net derivative losses allocated to Refrigerated & Frozen
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	(0.2)	(1.6)
Commodity contracts | Reporting segments | Net derivative gains allocated to International Foods
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	0.1	0.0
Commodity contracts | Reporting segments | Net derivative losses allocated to Foodservice
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	(0.3)	(0.6)
Commodity contracts | Reporting segments | Net derivative gains (losses) allocated to Commercial
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	0.1	(0.7)
Commodity contracts | Net derivative gains (losses) recognized in general corporate expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses) incurred	$ 1.0	$ (2.2)