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. 29, 2021	Aug. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	$ 10.2
Commodity Contracts and Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	10.2	$ (4.0)
Commodity Contracts and Foreign Currency Contracts | Reporting segments
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	5.0	(1.5)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Grocery & Snacks
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	3.2	(1.8)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Refrigerated & Frozen
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	4.7	(1.1)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to International
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	(3.2)	1.6
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Foodservice
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	0.3	(0.2)
Commodity Contracts and Foreign Currency Contracts | Corporate
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	$ 5.2	$ (2.5)