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		9 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Feb. 27, 2022	Feb. 28, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred			$ 17.7
Commodity Contracts and Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	$ 10.0	$ 5.3	27.2	$ 1.4
Commodity Contracts and Foreign Currency Contracts | Reporting segments
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	8.1	(1.1)	21.9	(5.8)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Grocery & Snacks
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	3.9	0.3	11.8	(4.1)
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 incurred	3.6	(0.1)	12.9	(2.1)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to International
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	0.3	(1.3)	(3.6)	1.1
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Foodservice
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	0.3	0.0	0.8	(0.7)
Commodity Contracts and Foreign Currency Contracts | Corporate
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains incurred	$ 1.9	$ 6.4	$ 5.3	$ 7.2